A catalyst component for olefin polymerization, an olefin polymerization catalyst, and use thereof

Abstract

The application discloses an olefin polymerization catalyst component, an olefin polymerization catalyst and application thereof. The olefin polymerization catalyst component comprises Mg, Ti, halogen, at least one internal electron donor a compound and at least one internal electron donor b compound. The internal electron donor a compound is selected from 2,6-dimethoxycarbonyl substituent-4-pyrone in a general formula (I), and the internal electron donor b compound is selected from a Lewis base compound. The catalyst component of the application can significantly improve the activity after being compounded with the Lewis base compound by taking 2,6-dimethoxycarbonyl substituent-4-pyrone as the internal electron donor. The catalyst can obtain high isotacticity of polypropylene, and even when no external electron donor is added, high isotacticity of polyolefin can still be obtained.

Description

Technical Field

[0001] This invention relates to a catalyst component for olefin polymerization, a catalyst containing the solid catalyst component, and the application of the catalyst in olefin polymerization reactions, particularly in propylene polymerization reactions. Background Technology

[0002] Polyolefins are a class of polymer materials with the largest production volume and widest application due to their abundant raw materials, low price, ease of processing and molding, and excellent comprehensive properties. Currently, Ziegler-Natta catalysts (ZN catalysts) still dominate polyolefin production. Most ZN catalyst development focuses on the development of highly active and stereoregular catalysts and improving the copolymerization ability of catalysts. Moreover, because traditional ZN catalysts (transition metal compounds such as titanium chemically bonded to a magnesium support) have high catalytic efficiency, produce polymers with good comprehensive performance, and are low in cost, the vast majority of catalysts used in polyolefin production worldwide are still based on ZN catalytic systems, characterized by high activity, high stereoregularity, long lifespan, and customizable product structures. The development process of ZN catalysts shows that as early as after the emergence of the first generation of catalysts, it was discovered that the addition of a third component (mostly an electron donor, also known as a Lewis base; those added during catalyst preparation are called internal electron donors, while those added during polymerization are called external electron donors) has a significant impact on olefin polymerization behavior and polymer properties. Modifying the internal electron donor in a catalyst can maximally alter the properties of the catalyst's active center, thereby maximizing the change in catalyst performance. Therefore, the development of novel electron donors has always been a hot topic in polyolefin catalyst research and development.

[0003] The most distinctive high-performance internal electron donor compounds in the prior art include: 1) fatty acid esters and aromatic esters, mainly phthalates; 2) diethers (e.g., EP0361493, EP0728724); 3) succinates (e.g., WO9856834, WO0063261, WO03022894); 4) glycol esters (e.g., WO9856834, WO0063261, WO03022894); and 5) compounds with other functional groups (CN1105671, CN1242780, US20060128558), etc. However, in practical applications, the above-mentioned compounds all have certain problems as internal electron donors for olefin polymerization catalysts. Although catalysts using 1,3-diether compounds as internal electron donors have high activity and good hydrogen-modulated sensitivity, the relative molecular mass distribution of the synthesized PP is narrow, which is not conducive to the development of different grades of PP. Succinate compounds as internal electron donors have the advantage of producing PP with a wider relative molecular mass distribution, but the stereoregularity of PP and the hydrogen-modulated sensitivity of the catalyst need to be improved. The activity of glycol ester catalytic systems is generally not as ideal as that of diether systems.

[0004] High-rigidity polypropylene (PP) possesses characteristics such as high strength, high modulus, high surface hardness, good scratch and creep resistance, high heat distortion resistance, chemical corrosion resistance, good melt flowability, and short molding cycle, and has been widely used in domestic and international markets. Improving the rigidity of PP can be categorized into two methods: external reactor rigidification and internal reactor rigidification. External reactor rigidification involves adding fillers, nucleating agents, or rigidifying agents to PP through blending. Internal reactor rigidification involves improving the polymerization process, selecting a suitable catalyst system, modifying the catalyst, adding nucleating agents to the reactor, or a combination of these methods to prepare high-rigidity PP. Internal reactor rigidification PP features low raw material loss, low energy consumption, low cost, and uniform product quality, thus showing great development potential. The preparation of high-rigidity PP using the internal rigidification method generally requires the selection of catalysts with high activity, high stereoselectivity, and the ability to effectively control the relative molecular mass and distribution of PP.

[0005] The preparation of polyolefin catalysts with high activity, high isotacticity, and wide molecular weight distribution is an important research direction in the industry. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a catalyst component for olefin polymerization, wherein the olefin polymerization catalyst containing this component has high activity, and the polyolefin obtained by catalysis has characteristics such as high isotacticity and wide molecular weight distribution.

[0007] The purpose of this invention is to provide a catalyst component for olefin polymerization.

[0008] Another object of the present invention is to provide a method for preparing the catalyst component for olefin polymerization.

[0009] Another object of the present invention is to provide the olefin polymerization catalyst.

[0010] Another object of the present invention is to provide the application of the catalyst in olefin polymerization.

[0011] To achieve the objectives of this invention, this invention provides a catalyst component for olefin polymerization, comprising Mg, Ti, halogen, at least one internal electron donor a compound and at least one internal electron donor b compound, wherein the internal electron donor a compound is selected from 2,6-dimethoxycarbonyl-substituted-4-pyranone of general formula (I), and the internal electron donor b compound is selected from Lewis base compounds.

[0012]

[0013] In general formula (I), R 1 R 2 R 3 and R 4 Whether the elements are the same or different, they are each independently selected from H, halogens, and C1-C. 20 The hydrocarbon group; preferably, R 1 R 2 R 3 and R 4 It may also contain at least one heteroatom selected from N, O, S, P, Si and halogens; preferably, R 1 R 2 R 3 and R 4 Two or more of them can bond together to form a ring.

[0014] Preferably, R in general formula (I) 1 R 2 R 3 and R 4 The substituents, whether identical or different, are independently selected from H, halogens, and the following substituents with up to 20 carbon atoms: straight-chain or branched alkyl, cycloalkyl, alkenyl, ester, phenyl, alkylphenyl, phenylalkyl, indene, benzyl, halogenated or substituted with N, O, S, P, or Si heteroatoms, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, indene, benzyl; or are independently selected from heterocyclic aryl substituents.

[0015] Preferably, R in general formula (I) 1 R 2 R 3 and R 4Whether the groups are the same or different, each is independently selected from H, halogen, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, cyclopentyl, n-hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, C 11 ~C 20 The following substituents with 20 or fewer carbon atoms, whether straight-chain or branched alkyl groups: alkenyl, phenyl, m-chlorophenyl, p-chlorophenyl, o-chlorophenyl, m-methoxyphenyl, p-methoxyphenyl, o-methoxyphenyl, p-methylphenyl, p-nitrophenyl, m-nitrophenyl, substituted benzyl, substituted phenethyl, furanyl, pyrroleyl, thiophenyl, propenyl, butenyl, pentenyl, hexenyl, indene.

[0016] Preferably, the 2,6-dimethoxycarbonyl-substituted 4-pyranone of general formula (I) is selected from 2,6-dimethoxycarbonylethyl-4-pyranone, 2,6-dimethoxycarbonylpropyl-4-pyranone, 2,6-dimethoxycarbonylbutyl-4-pyranone, 2,6-dimethoxycarbonylpentyl-4-pyranone, 2,6-dimethoxycarbonylcyclohexyl-4-pyranone, and 2,6-dimethoxycarbonylcyclohexyl-4-pyranone. Carbonyloctyl-4-pyranone, 2,6-dimethoxycarbonyldodecyl-4-pyranone, 2,6-dimethoxycarbonyltetradecyl-4-pyranone, 2,6-dimethoxycarbonylhexadecyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-4-pyranone, 2,6-dimethoxycarbonylm-chlorophenyl-p-tolyl-4-pyranone, 2,6-dimethoxycarbonylo-chlorophenyl-4-pyranone The ketone, 2,6-dimethoxycarbonyl-p-chlorophenyl-4-pyranone, 2,6-dimethoxycarbonyl-p-methoxyphenyl-4-pyranone, 2,6-dimethoxycarbonyl-p-nitrophenyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-dimethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-diethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-dipropyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-dibutyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3-methyl-5-ethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3-ethyl-5-butyl-4-pyranone, and 2,6-dimethoxycarbonylphenyl-3-methyl-5-butyl-4-pyranone.

[0017] Preferably, the 2,6-dimethoxycarbonyl-substituted 4-pyranone of general formula (I) can be synthesized by methods including but not limited to the following:

[0018]

[0019] R 1 and R 2 Same or different, R 3 and R 4One of the synthetic routes for 2,6-dimethoxycarbonyl-substituted 4-pyranones of the same or different general formula (I) is shown below:

[0020]

[0021] The synthetic route specifically includes the following steps: diethyl oxalate reacts with the corresponding ketone and is then reduced to obtain a substituted 2,6-dimethyl-4-pyranone compound, which is then reacted with an acyl chloride to obtain a pure (substituted) 2,6-dimethoxycarbonyl-substituted 4-pyranone compound, or reacted with a mixture of two acyl chlorides to obtain a mixture of three (substituted) 2,6-dimethoxycarbonyl-substituted 4-pyranone compounds. Without separation, the mixture is directly used as an internal electron donor. The proportion of each component in the mixture can be adjusted by the addition ratio of the two acyl chlorides as reactants. The proportion of each component can be determined by characterization using analytical methods such as chromatography-mass spectrometry and nuclear magnetic resonance.

[0022] Preferably, the molar ratio of the internal electron donor compound a to the internal electron donor compound b is greater than or equal to 2:8.

[0023] Preferably, the molar ratio of the internal electron donor compound a to the internal electron donor compound b is greater than or equal to 5:5.

[0024] Preferably, the molar ratio of the internal electron donor compound a to the internal electron donor compound b is greater than or equal to 6:4.

[0025] Preferably, the molar ratio of the internal electron donor compound a to the internal electron donor compound b is greater than or equal to 7:3.

[0026] Preferably, the molar ratio of the internal electron donor compound a to the internal electron donor compound b is 7:3.

[0027] Preferably, the Lewis base compound contains one or more electronegative groups, wherein the electron-donating atom is selected from N, O, S, P, As or Sn.

[0028] Preferably, the Lewis base compound is selected from electron-donating compounds of diethers, esters, diketones, diamines, monocarboxylic acid esters, or polycarboxylic acid esters. When the 2,6-dimethoxycarbonyl-substituted 4-pyranone of general formula (I) is used together with the Lewis base compound, a catalyst with tunable performance can be obtained, especially with a significant improvement in catalyst activity.

[0029] Preferably, the Lewis base compound is selected from 1,3-diether compounds represented by general formula (II):

[0030]

[0031] In general formula (II), R 5 -R 10 Whether the groups are the same or different, each is independently selected from H, or each is independently selected from straight-chain or branched alkyl, cycloalkyl, aryl, alkylaryl, or aralkyl groups containing 1-18 carbon atoms; R 11 and R 2 Whether the groups are the same or different, each is independently selected from straight-chain or branched alkyl groups with 1-20 carbon atoms, cycloalkyl groups with 3-20 carbon atoms, aryl groups with 5-20 carbon atoms, alkylaryl groups with 7-20 carbon atoms, and aralkyl groups; preferably, R 5 -R 12 One or more groups in the structure are linked to form a ring structure, and preferably, each group also contains at least one heteroatom selected from halogen, N, O, S, P and Si.

[0032] Specifically, the 1,3-diether compounds include, but are not limited to, those selected from: 2-(2-ethylhexyl)1,3-dimethoxypropane, 2-isopropyl-1,3-dimethoxypropane, 2-butyl-1,3-dimethoxypropane, 2-sec-butyl-1,3-dimethoxypropane, 2-cyclohexyl-1,3-dimethoxypropane, 2-phenyl-1,3-dimethoxypropane, 2-tert-butyl-1,3-dimethoxypropane, 2-cumyl-1,3-dimethoxypropane, 2-(2-phenylethyl)-1,3-dimethoxypropane, 2-(2-cyclohexylethyl)-1,3-dimethoxypropane, 2-(p-chlorophenyl)-1,3-dimethoxypropane, 2-(diphenylmethyl)-1,3-dimethoxypropane, 2 (1-Naphthyl)-1,3-dimethoxypropane, 2-(p-fluorophenyl)-1,3-dimethoxypropane, 2-(1-decahydronaphthyl)-1,3-dimethoxypropane, 2-(p-tert-butylphenyl)-1,3-dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-dimethoxypropane, 2,2-dipropyl-1,3-dimethoxypropane, 2,2-dibutyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-diethoxypropane, 2,2-dicyclopentyl-1,3-dimethoxypropane, 2,2-dipropyl-1,3-diethoxypropane, 2,2-dibutyl-1,3-diethoxypropane, 2-methyl-2-ethyl-1,3-dimethyl 2-Methyl-2-propyl-1,3-dimethoxypropane, 2-Methyl-2-benzyl-1,3-dimethoxypropane, 2-Methyl-2-phenyl-1,3-dimethoxypropane, 2-Methyl-2-cyclohexyl-1,3-dimethoxypropane, 2-Methyl-2-methylcyclohexyl-1,3-dimethoxypropane, 2,2-bis(p-chlorophenyl)-1,3-dimethoxypropane, 2,2-bis(2-phenylethyl)-1,3-dimethoxypropane, 2,2-bis(2-cyclohexylethyl)-1,3-dimethoxypropane, 2-Methyl-2-isobutyl-1,3-dimethoxypropane, 2-Methyl-2-(2-ethylhexyl)-1,3-dimethoxypropane, 2,2-bis(2-ethylhexyl) )-1,3-dimethoxypropane, 2,2-bis(p-methylphenyl)-1,3-dimethoxypropane, 2-methyl-2-isopropyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane, 2,2-diphenyl-1,3-dimethoxypropane, 2,2-dibenzyl-1,3-dimethoxypropane, 2-isopropyl-2-cyclopentyl-1,3-dimethoxypropane, 2,2-bis(cyclohexylmethyl)-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-diethoxypropane, 2,2-diisobutyl-1,3-dibutoxypropane, 2-isobutyl-2-isopropyl-1,3-dimethoxypropane, 2,2-di-sec-butyl-1,3-dimethoxypropane, 2,2-Di-tert-butyl-1,3-dimethoxypropane, 2,2-dineopentyl-1,3-dimethoxypropane, 2-iso-propyl-2-isopentyl-1,3-dimethoxypropane, 2-phenyl-2-benzyl-1,3-dimethoxypropane, 2-cyclohexyl-2-cyclohexylmethyl-1,3-dimethoxypropane. 1,1-bis(methoxymethyl)-cyclopentadiene; 1,1-bis(methoxymethyl)-2,3,4,5-tetramethylcyclopentadiene; 1,1-bis(methoxymethyl)-2,3,4,5-tetraphenylcyclopentadiene; 1,1-bis(methoxymethyl)-2,3,4,5-tetrafluorocyclopentadiene; 1,1-bis(methoxymethyl)-3,4-dicyclopentylcyclopentadiene; 1,1-bis(methoxymethyl)indene; 1,1-bis(methoxymethyl)-2,3-dimethylindene; 1,1-bis(methoxymethyl)-4,5,6,7-tetrahydroindene; 1,1-bis(methoxymethyl)-2,3,6,7-tetrafluoroindene; 1,1-bis( 1,1-bis(methoxymethyl)-4,7-dimethylindene; 1,1-bis(methoxymethyl)-3,6-dimethylindene; 1,1-bis(methoxymethyl)-4-phenylindene; 1,1-bis(methoxymethyl)-4-phenyl-2-methylindene; 1,1-bis(methoxymethyl)-4-cyclohexylindene; 1,1-bis(methoxymethyl)-7-(3,3,3-trifluoropropyl)indene; 1,1-bis(methoxymethyl)-7-trimethylsilylindene; 1,1-bis(methoxymethyl)-7-trifluoromethylindene; 1,1-bis(methoxymethyl)-4,7-dimethyl-4,5,6,7-tetrahydroindene; 1,1-bis(methoxymethyl)-7- Methyl indene; 1,1-bis(methoxymethyl)-7-cyclopentyl indene; 1,1-bis(methoxymethyl)-7-isopropyl indene; 1,1-bis(methoxymethyl)-7-cyclohexyl indene; 1,1-bis(methoxymethyl)-7-tert-butyl indene; 1,1-bis(methoxymethyl)-7-tert-butyl-2-methyl indene; 1,1-bis(methoxymethyl)-7-phenyl indene; 1,1-bis(methoxymethyl)-2-phenyl indene; 1,1-bis(methoxymethyl)-1H-benzo[e]indene; 1,1-bis(methoxymethyl)-1H-2-methylbenzo[e]indene; 9,9-bis(methoxymethyl)fluorene; 9,9-bis(methoxymethyl)fluorene 9,9-Bis(methoxymethyl)-2,3,4,5,6,7-hexafluorofluorene; 9,9-Bis(methoxymethyl)-2,3-benzo[a]fluorene; 9,9-Bis(methoxymethyl)-2,3,6,7-dibenzo[a]fluorene; 9,9-Bis(methoxymethyl)-2,7-diisopropylfluorene; 9,9-Bis(methoxymethyl)-1,8-dichlorofluorene; 9,9-Bis(methoxymethyl)-2,7-dicyclopentylfluorene; 9,9-Bis(methoxymethyl)-1,8-difluorofluorene; 9,9-Bis(methoxymethyl)-1,2,3,4-tetrahydrofluorene; 9,9-Bis(methoxymethyl)-1,2,3,4-tetrahydrofluorene; 9,9-Bis(methoxymethyl)-1,2,3,4-tetrahydrofluorene;At least one of 4,5,6,7,8-octahydrofluorene; 9,9-bis(methoxymethyl)-4-tert-butylfluorene.

[0033] Preferably, the electron-donating compound of the diether is further selected from diether compounds represented by general formula (III):

[0034]

[0035] In general formula (III), R 19 -R 26 The same, each independently selected from hydrogen, halogen, straight-chain or branched alkyl, cycloalkyl, aryl, alkylaryl, and arylalkyl groups with 1-20 carbon atoms, 3-20 carbon atoms, aryl, alkylaryl, and arylalkyl groups with 7-20 carbon atoms, optionally containing at least one heteroatom selected from N, O, S, P, Si, and halogen as a substituent for a carbon atom, a hydrogen atom, or both; R 13 -R 16 Whether the groups are the same or different, each is independently selected from H, or each is independently selected from straight-chain or branched alkyl, cycloalkyl, aryl, alkylaryl, or aralkyl groups containing 1-18 carbon atoms; R 17 and R 18 Whether the groups are the same or different, each is independently selected from straight-chain or branched alkyl groups with 1-20 carbon atoms, cycloalkyl groups with 3-20 carbon atoms, aryl groups with 5-20 carbon atoms, alkylaryl groups with 7-20 carbon atoms, and aralkyl groups; preferably, R 13 -R 18 One or more groups in the structure are linked to form a ring structure, and preferably, each group also contains at least one heteroatom selected from halogen, N, O, S, P and Si.

[0036] Preferably, the diether compounds include, but are not limited to, those selected from: 2-(2-ethylhexyl)1,3-dimethoxypropane, 2-isopropyl-1,3-dimethoxypropane, 2-butyl-1,3-dimethoxypropane, 2-sec-butyl-1,3-dimethoxypropane, 2-cyclohexyl-1,3-dimethoxypropane, 2-phenyl-1,3-dimethoxypropane, 2-tert-butyl-1,3-dimethoxypropane, 2-cumyl-1,3-dimethoxypropane, 2-(2-phenylethyl)-1,3-dimethoxypropane, 2-(2-cyclohexylethyl)-1,3-dimethoxypropane, 2-(p-chlorophenyl)-1,3-dimethoxypropane, 2-(diphenylmethyl)-1,3-dimethoxypropane, 2(1- Naphthyl)-1,3-dimethoxypropane, 2(p-fluorophenyl)-1,3-dimethoxypropane, 2(1-decahydronaphthyl)-1,3-dimethoxypropane, 2(p-tert-butylphenyl)-1,3-dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-dimethoxypropane, 2,2-dipropyl-1,3-dimethoxypropane, 2,2-dibutyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-diethoxypropane, 2,2-dicyclopentyl-1,3-dimethoxypropane, 2,2-dipropyl-1,3-diethoxypropane, 2,2-dibutyl-1,3-diethoxypropane, 2-methyl-2-ethyl-1,3-dimethoxypropane Alkane, 2-methyl-2-propyl-1,3-dimethoxypropane, 2-methyl-2-benzyl-1,3-dimethoxypropane, 2-methyl-2-phenyl-1,3-dimethoxypropane, 2-methyl-2-cyclohexyl-1,3-dimethoxypropane, 2-methyl-2-methylcyclohexyl-1,3-dimethoxypropane, 2,2-bis(p-chlorophenyl)-1,3-dimethoxypropane, 2,2-bis(2-phenylethyl)-1,3-dimethoxypropane, 2,2-bis(2-cyclohexylethyl)-1,3-dimethoxypropane, 2-methyl-2-isobutyl-1,3-dimethoxypropane, 2-methyl-2-(2-ethylhexyl)-1,3-dimethoxypropane, 2,2-bis(2-ethylhexyl)-1 3-Dimethoxypropane, 2,2-bis(p-methylphenyl)-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, 2-methyl-2-isopropyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane, 2,2-diphenyl-1,3-dimethoxypropane, 2,2-dibenzyl-1,3-dimethoxypropane, 2-isopropyl-2-cyclopentyl-1,3-dimethoxypropane, 2,2-bis(cyclohexylmethyl)-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-diethoxypropane, 2,2-diisobutyl-1,3-dibutoxypropane, 2-isobutyl-2-isopropyl-1,3-dimethoxypropane, 2,2-Di-sec-butyl-1,3-dimethoxypropane, 2,2-di-tert-butyl-1,3-dimethoxypropane, 2,2-dineopentyl-1,3-dimethoxypropane, 2-iso-propyl-2-isopentyl-1,3-dimethoxypropane, 2-phenyl-2-benzyl-1,3-dimethoxypropane, 2-cyclohexyl-2-cyclohexylmethyl-1,3-dimethoxypropane, 1,1-bis(methoxymethyl)-cyclopentadiene; 1,1-bis(methoxymethyl)-2,3,4,5-tetramethylcyclopentadiene; 1,1-bis(methoxymethyl)-2,3,4,5-tetraphenylcyclopentadiene; 1,1-bis(methoxymethyl)-2,3,4,5-tetrafluorocyclopentadiene; 1,1-bis(methoxymethyl)-3 4-Dicyclopentylcyclopentadiene; 1,1-bis(methoxymethyl)indene; 1,1-bis(methoxymethyl)-2,3-dimethylindene; 1,1-bis(methoxymethyl)-4,5,6,7-tetrahydroindene; 1,1-bis(methoxymethyl)-2,3,6,7-tetrafluoroindene; 1,1-bis(methoxymethyl)-4,7-dimethylindene; 1,1-bis(methoxymethyl)-3,6-dimethylindene; 1,1-bis(methoxymethyl)-4-phenylindene; 1,1-bis(methoxymethyl)-4-phenyl-2-methylindene; 1,1-bis(methoxymethyl)-4-cyclohexylindene; 1,1-bis(methoxymethyl)-7-(3,3,3-trifluoropropyl)indene; 1,1-bis(methoxymethyl)-7- Trimethylsilyl indene; 1,1-bis(methoxymethyl)-7-trifluoromethyl indene; 1,1-bis(methoxymethyl)-4,7-dimethyl-4,5,6,7-tetrahydro indene; 1,1-bis(methoxymethyl)-7-methyl indene; 1,1-bis(methoxymethyl)-7-cyclopentyl indene; 1,1-bis(methoxymethyl)-7-isopropyl indene; 1,1-bis(methoxymethyl)-7-cyclohexyl indene; 1,1-bis(methoxymethyl)-7-tert-butyl indene; 1,1-bis(methoxymethyl)-7-tert-butyl-2-methyl indene; 1,1-bis(methoxymethyl)-7-phenyl indene; 1,1-bis(methoxymethyl)-2-phenyl indene; 1,1-bis(methoxymethyl)-1H-benzo[e]indene; 1 1-Bis(methoxymethyl)-1H-2-methylbenzo[e]indene; 9,9-bis(methoxymethyl)fluorene; 9,9-bis(methoxymethyl)-2,3,6,7-tetramethylfluorene; 9,9-bis(methoxymethyl)-2,3,4,5,6,7-hexafluorofluorene; 9,9-bis(methoxymethyl)-2,3-benzofluorene; 9,9-bis(methoxymethyl)-2,3-benzofluorene 9,9-bis(methoxymethyl)-2,3,6,7-dibenzo[a]fluorene; 9,9-bis(methoxymethyl)-2,7-diisopropylfluorene; 9,9-bis(methoxymethyl)-1,8-dichlorofluorene; 9,9-bis(methoxymethyl)-2,7-dicyclopentylfluorene; 9,9-bis(methoxymethyl)-1,8-difluorofluorene; 9,9-bis(methoxymethyl)-1,2,3,At least one of 4-tetrahydrofluorene; 9,9-bis(methoxymethyl)-1,2,3,4,5,6,7,8-octahydrofluorene; and 9,9-bis(methoxymethyl)-4-tert-butylfluorene.

[0037] Preferably, the polycarboxylic acid ester compound is an aromatic dicarboxylic acid compound or an aliphatic chain dicarboxylic acid ester compound;

[0038] The aromatic dicarboxylic acid compound may be a diester of an aromatic dicarboxylic acid, such as phthalate diesters or terephthalate diesters. The phthalate diesters may include, but are not limited to: dimethyl phthalate, diethyl phthalate, di-n-propyl phthalate, diisopropyl phthalate, dibutyl phthalate, di-n-butyl phthalate, and diisopropyl phthalate. Butyl phthalate, ethyl phthalate, isopropyl phthalate, n-propyl phthalate, n-butyl phthalate, isobutyl phthalate, di-n-pentyl phthalate, diisopentyl phthalate, dihexyl phthalate, di-n-heptyl phthalate, di-n-octyl phthalate, diisooctyl phthalate, (2,2-dimethylhexyl) phthalate, o- Di(2-ethylhexyl) phthalate, di-n-nonyl phthalate, diisodecyl phthalate, (2,2-dimethylheptyl) phthalate, isohexyl phthalate, (2-ethylhexyl) phthalate, n-pentyl hexyl phthalate, isononyl phthalate, isodecyl phthalate, undecyl phthalate, n-pentyl phthalate, phthalic acid Isopentyl isohexyl dicarboxylate, n-hexyl phthalate (2-methylhexyl ester), n-hexyl phthalate (2-ethylhexyl ester), n-hexyl phthalate (isononyl ester), n-hexyl phthalate (n-decyl ester), n-heptyl phthalate (2-ethylhexyl ester), n-heptyl phthalate (isononyl ester), n-heptyl neononyl phthalate, and 2-ethylhexyl phthalate (isononyl ester). These esters can be used alone or in combination.The diterephthalates mentioned include, but are not limited to: dimethyl terephthalate, diethyl terephthalate, di-n-propyl terephthalate, diisopropyl terephthalate, di-n-butyl terephthalate, diisobutyl terephthalate, methyl terephthalate, isopropyl terephthalate, ethyl terephthalate (n-propyl), ethyl terephthalate (n-butyl), ethyl terephthalate (isobutyl), and so on. Di-n-pentyl terephthalate, diisopentyl terephthalate, dihexyl terephthalate, di-n-heptyl terephthalate, di-n-octyl terephthalate, diiso-n-octyl terephthalate, di(2,2-dimethylhexyl) terephthalate, di(2-ethylhexyl) terephthalate, di-n-nonyl terephthalate, diisononyl terephthalate, diisodecyl terephthalate, di(2,2-diethylhexyl) terephthalate Methyl ethyl heptyl ester, butyl terephthalate isohexyl ester, butyl terephthalate (2-ethylhexyl) ester, pentyl terephthalate (n-hexyl) ester, pentyl terephthalate isohexyl ester, isopentyl terephthalate (heptyl) ester, terephthalic acid, pentyl terephthalate (2-ethylhexyl) ester, pentyl terephthalate (isononyl) ester, isopentyl terephthalate (n-decyl) ester, pentyl terephthalate At least one of undecyl ester, isoamyl terephthalate, n-hexyl terephthalate (2-ethylhexyl ester), n-hexyl terephthalate (isononyl ester), n-hexyl terephthalate (n-decyl ester), n-heptyl terephthalate (2-ethylhexyl ester), n-heptyl terephthalate (isononyl ester), n-heptyl terephthalate (neodecanyl ester), and 2-ethylhexyl terephthalate (isononyl ester).

[0039] Among the aforementioned aromatic dicarboxylic acid diester compounds, at least one of diethyl phthalate, dipropyl butyl phthalate, diisopropyl terephthalate, di-n-butyl phthalate, diisobutyl phthalate, di-n-octyl phthalate, diisooctyl phthalate, di-n-butyl terephthalate, diisobutyl terephthalate, di-n-octyl terephthalate, diiso-n-octyl terephthalate, di(2-ethylhexyl) terephthalate, and diisodecyl phthalate is preferred.

[0040] Preferably, the polycarboxylic acid ester compound of the Lewis base compound is selected from succinate compounds represented by general formula (IV):

[0041]

[0042] In general formula (IV), R 27 and R 28 Whether the two are the same or different, they are each independently selected from C1-C. 20 Linear or branched alkyl, alkenyl, cycloalkyl, aryl, aralkyl, or alkylaryl groups, optionally containing heteroatoms; R 29 -R32 At least two groups are different from hydrogen and are selected from C1-C2. 20 Linear or branched alkyl, alkenyl, cycloalkyl, aryl, aralkyl, or alkylaryl groups, optionally containing heteroatoms; preferably, R 29 -R 32 Connected together to form a loop; preferably, R 27 and R 28 Whether the groups are the same or different, each is independently selected from C1-C8 alkyl, cycloalkyl, aryl, aralkyl, and alkylaryl groups; preferably, R 27 and R 28 Selected from primary alkyl groups, especially branched primary alkyl groups; preferably, R 27 and R 28 Selected from methyl, ethyl, n-propyl, n-butyl, isobutyl, neopentyl, and 2-ethylhexyl.

[0043] Preferably, the general formula (IV) is a class of compounds: R 29 -R 31 It is hydrogen and R 32 It is a branched alkyl, cycloalkyl, aryl, aralkyl, and alkylaryl group having 3-10 carbon atoms; preferably, R 32It is a branched primary alkyl group or cycloalkyl group having 3-10 carbon atoms. Specifically, the succinate compound is a monosubstituted succinate compound, which may include, but is not limited to: diethyl sec-butyl succinate, diethyl hexyl succinate, diethyl cyclopropyl succinate, diethyl norbornyl succinate, diethyl perhydrogenated succinate, diethyl trimethyl succinate, diethyl methoxysuccinate, diethyl p-methoxyphenyl succinate, diethyl p-chlorophenyl succinate, diethyl phenyl succinate, and diethyl cyclohexyl succinate. Diethyl succinate, benzyl succinate, diethyl cyclohexyl methyl succinate, diethyl tert-butyl succinate, diethyl isobutyl succinate, diethyl isopropyl succinate, diethyl neopentyl succinate, diethyl isopentyl succinate, diethyl (1-trifluoromethylethyl) succinate, diethyl fluorenyl succinate, phenyl succinate (1-ethoxycarbonyl diisobutyl ester)(1-(ethoxycarbodiisobutyl) phenylsuccinate), sec-butyl diisobutyl succinate, hexyl diisobutyl succinate, cyclopropyl diisobutyl succinate, norbornel diisobutyl succinate, perhydrogenated diisobutyl succinate, trimethylsilyl diisobutyl succinate, methoxy diisobutyl succinate, p-methoxyphenyl diisobutyl succinate, p-chlorophenoxy diisobutyl succinate, cyclohexyl diisobutyl succinate, benzyl diisobutyl succinate, cyclohexylmethyl diisobutyl succinate, tert-butyl diisobutyl succinate, isobutyl diisobutyl succinate, isopropyl diisobutyl succinate, neopentyl diisobutyl succinate, isopentyl diisobutyl succinate, (1-trifluoromethylethyl) diisobutyl succinate, fluorenyl diisobutyl succinate The following are at least one of the following: dipentyl sec-butylsuccinate, dipentyl hexylsuccinate, dipentyl cyclopropylsuccinate, dipentyl norbornylsuccinate, dipentyl perhydrogenated succinate, dipentyl trimethylsilylsuccinate, dipentyl methoxysuccinate, dipentyl p-methoxyphenylsuccinate, dipentyl p-chlorophenylsuccinate, dipentyl phenylsuccinate, dipentyl cyclohexylsuccinate, dipentyl benzylsuccinate, dipentyl cyclohexylmethylsuccinate, dipentyl tert-butylsuccinate, dipentyl isobutylsuccinate, dipentyl isopropylsuccinate, dipentyl neopentylsuccinate, dipentyl isopentylsuccinate, dipentyl (1-trifluoromethylethyl)succinate, and dipentyl fluorenylsuccinate.

[0044] As another preferred embodiment, the compound represented by general formula (IV) can be a class of compounds in which R 29 -R 32 At least two groups are different from hydrogen and are selected from C1-C2. 20The succinate compound contains linear or branched alkyl, alkenyl, cycloalkyl, aryl, aralkyl, or alkylaryl groups, optionally containing heteroatoms; preferably, two non-hydrogen groups are attached to the same carbon atom; specifically, the succinate compound is a disubstituted succinate compound, which may include, but is not limited to: diethyl 2,2-dimethylsuccinate, diethyl 2-ethyl-2-methylsuccinate, diethyl 2-benzyl-2-isopropylsuccinate, diethyl 2-cyclohexylmethyl-2-isobutylsuccinate, diethyl 2-cyclopentyl-2-n-butylsuccinate, diethyl 2,2-diisobutylsuccinate, diethyl 2-cyclohexylmethyl-2-isobutylsuccinate, diethyl 2-cyclopentyl-2-n-butylsuccinate, diethyl 2,2-diisobutylsuccinate, diethyl 2-cyclohexylmethylsuccinate, diethyl 2-cyclohexylmethylsuccinate, diethyl 2-isobutyl ...isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl 2-isobutylsuccinate, diethyl Diethyl 2-ethyl succinate, 2-isopropyl-2-methyl succinate, 2-tetradecyl-2-ethyl succinate, 2-isobutyl-2-ethyl succinate, 2-(1-trifluoromethylethyl)-2-methyl succinate, 2-isopentyl-2-isobutyl succinate, 2-phenyl-2-n-butyl succinate, 2,2-dimethyl succinate, 2-ethyl-2-methyl succinate, 2-benzyl-2-isopropyl succinate, 2-cyclohexylmethyl-2-isobutyl succinate, 2-cyclopentyl-2-n-ethyl succinate Diisobutyl butyl succinate, 2,2-diisobutyl butyl succinate, 2-cyclohexyl-2-ethylsuccinate, 2-isopropyl-2-methylsuccinate, 2-tetradecyl-2-ethylsuccinate, 2-isobutyl-2-ethylsuccinate, 2-(1-trifluoromethylethyl)-2-methylsuccinate, 2-isopentyl-2-isobutyl succinate, 2-phenyl-2-n-butylsuccinate, 2,2-dimethylsuccinate, 2-ethyl-2-methylsuccinate, 2-benzyl-2-isopropylsuccinate Dipentyl succinate, 2-cyclohexylmethyl-2-isobutylsuccinate, 2-cyclopentyl-2-n-butylsuccinate, 2,2-diisobutylsuccinate, 2-cyclohexyl-2-ethylsuccinate, 2-isopropyl-2-methylsuccinate, 2-tetradecyl-2-ethylsuccinate, 2-isobutyl-2-ethylsuccinate, 2-(1-trifluoromethylethyl)-2-methylsuccinate, 2-isopentyl-2-isobutylsuccinate, and 2-phenyl-2-n-butylsuccinate.

[0045] Furthermore, according to another embodiment of the present invention, in the compound represented by general formula (IV), at least two non-hydrogen groups are attached to different carbon atoms; preferably, at least two non-hydrogen groups are attached to R. 29 and R 31 Or R 30 and R 32Above. Specifically, such succinate compounds may include, but are not limited to: diethyl 2,3-di(trimethylsilyl)succinate, diethyl 2-sec-butyl-3-methylsuccinate, diethyl 2-(3,3,3-trifluoropropyl)-3-methylsuccinate, diethyl 2,3-di(2-ethylbutyl)succinate, diethyl 2,3-diethyl-2-isopropylsuccinate, diethyl 2,3-diisopropyl-2-methylsuccinate, diethyl 2,3-dicyclohexyl-2-methylsuccinate, diethyl 2,3-dibenzylsuccinate, diethyl 2,3-diisopropylsuccinate, diethyl 2,3-di(cyclohexylmethyl)succinate, diethyl 2,3-di-tert-butylsuccinate, diethyl 2,3-diisobutylsuccinate, 2, Diethyl 3-dinepentylsuccinate, diethyl 2,3-diisopentylsuccinate, diethyl 2,3-di(1-trifluoromethylethyl)succinate, diethyl 2,3-di(tetradecyl)succinate, diethyl 2,3-difluorenylsuccinate, diethyl 2-isopropyl-3-isobutylsuccinate, diethyl 2-tert-butyl-3-isopropylsuccinate, diethyl 2-isopropyl-3-cyclohexylsuccinate, diethyl 2-isopentyl-3-cyclohexylsuccinate, diethyl 2-tetradecyl-3-cyclohexylsuccinate, diethyl 2-cyclohexyl-3-cyclopentylsuccinate, diethyl 2,2,3,3-tetramethylsuccinate, diethyl 2,2,3,3-tetraethylsuccinate, diethyl 2,2,3,3-tetrapropylsuccinate, diethyl 2,3-di Diethyl 2,3-diisopropylsuccinate, diethyl 2,2,3,3-tetrafluorosuccinate, diisobutyl 2,3-di(trimethylsilyl)succinate, diisobutyl 2-sec-butyl-3-methylsuccinate, diisobutyl 2-(3,3,3-trifluoropropyl)-3-methylsuccinate, diisobutyl 2,3-di(2-ethylbutyl)succinate, diisobutyl 2,3-diethyl-2-isopropylsuccinate, diisobutyl 2,3-diisopropyl-2-methylsuccinate, diisobutyl 2,3-dicyclohexyl-2-methylsuccinate, diisobutyl 2,3-dibenzylsuccinate, diisobutyl 2,3-diisopropylsuccinate, diisobutyl 2,3-di(cyclohexylmethyl)succinate, diisobutyl 2,3-di-tert-butylsuccinate Butyl ester, 2,3-diisobutylsuccinate, 2,3-dineopentylsuccinate, 2,3-diisopentylsuccinate, 2,3-di(1-trifluoromethylethyl)succinate, 2,3-di(tetradecyl)succinate, 2,3-difluorenylsuccinate, 2-isopropyl-3-isobutylsuccinate, 2-tert-butyl-3-isopropylsuccinate, 2-isopropyl-3-cyclohexylsuccinate, 2-isopentyl-3-cyclohexylsuccinate, 2-tetramethyl-3-cyclohexylmethylsuccinate, 2-cyclohexyl-3-cyclopentylsuccinate, 2,2,3,3-tetramethylsuccinate, 2,2,3,3-diisobutyl ...-diisobutylsuccinate, 2,2,3-diisobutylsuccinate, 2,2,3-diisobutylsuccinate, 2,2,3-diisobutylsuccinate, 2,2,3-diisobutylsuccinate, 2,2,3-diisobutylsuccinate, 2,2,3-diisobutylsuccinate,3-Tetraethyl diisobutyl succinate, 2,2,3,3-tetrapropyl diisobutyl succinate, 2,3-diethyl-2,3-dipropyl diisobutyl succinate, 2,2,3,3-tetrafluorosuccinate, 2,3-di(trimethylsilyl)succinate dinepentyl succinate, 2-sec-butyl-3-methylsuccinate dinepentyl succinate, 2-(3,3,3-trifluoropropyl)-3-methylsuccinate dinepentyl succinate, 2,3-di(2-ethylbutyl)succinate Dipentyl succinate, 2,3-diethyl-2-isopropyl dipentyl succinate, 2,3-diisopropyl-2-methyl dipentyl succinate, 2,3-dicyclohexyl-2-methyl dipentyl succinate, 2,3-dibenzyl dipentyl succinate, 2,3-diisopropyl dipentyl succinate, 2,3-di(cyclohexylmethyl) dipentyl succinate, 2,3-di-tert-butyl dipentyl succinate, 2,3-diisobutyl dipentyl succinate, 2 Dipentyl 3-dineopentyl succinate, dipentyl 2,3-diisopentyl succinate, dipentyl 2,3-(1-trifluoromethylethyl)succinate, dipentyl 2,3-di(tetradecyl)succinate, dipentyl 2,3-difluorenyl succinate, dipentyl 2-isopropyl-3-isobutyl succinate, dipentyl 2-tert-butyl-3-isopropyl succinate, dipentyl 2-isopropyl-3-cyclohexyl succinate, dipentyl 2-isopentyl ... Dipentyl succinate, 2-tetramethyl-3-cyclohexylmethylsuccinate, 2-cyclohexyl-3-cyclopentylsuccinate, 2,2,3,3-tetramethylsuccinate, 2,2,3,3-tetraethylsuccinate, 2,2,3,3-tetrapropylsuccinate, 2,3-diethyl-2,3-diisopropylsuccinate, and 2,2,3,3-tetrafluorosuccinate are at least one of the following:

[0046] Preferably, in compounds of general formula (IV), the R group attached to the same carbon atom 29 -R 32 Two or four of them are linked together to form a ring. Such succinate compounds may include, but are not limited to, at least one of: 1-(ethoxycarbonyl)-1-(ethoxyacetyl)-2,6-dimethylcyclohexane, 1-(ethoxycarbonyl)-1-(ethoxyacetyl)-2,5-dimethylcyclopentane, 1-(ethoxycarbonyl)-1-(ethoxyacetylmethyl)-2-methylcyclohexane, and 1-(ethoxycarbonyl)-1-(ethoxyacetylcyclohexyl)cyclohexane.

[0047] The compounds discussed above can be used as pure isomers or as mixtures of enantiomers, or as mixtures of positional isomers and enantiomers. When pure isomers are to be used, they are generally separated and purified using separation techniques known in the art. In particular, some of the succinate compounds of the present invention can be used as pure racemic or meso forms, or alternatively as mixtures of both.

[0048] Preferably, the ester compound of the Lewis base compound is an ortho-phenylene diester of general formula (V):

[0049]

[0050] In general formula (V), R 33 and R 34 The C1-C molecules, whether identical or different, are independently selected from substituted or unsubstituted straight or branched chains. 20 Alkyl, C3-C 20 cycloalkyl, C6-C 20 Substituted or unsubstituted aryl groups, C7-C 20 Substituted or unsubstituted aralkyl, C2-C 10 olefin group, C 10 -C 20 Fused ring aryl or ester group, and R 33 and R 34 Not hydrogen; R 35 -R 38 Whether identical or different, each is independently selected from hydrogen, substituted or unsubstituted C1-C. 20 hydrocarbon groups, including C1-C 20 Alkoxy groups, heteroatoms, and combinations thereof.

[0051] Preferably, the ester compound of the Lewis base compound is a compound represented by general formula (VI):

[0052]

[0053] In general formula (VI), R 39 -R 52 They may be the same or different, each independently selected from hydrogen, substituted hydrocarbon groups containing 1 to 20 carbon atoms, unsubstituted hydrocarbon groups containing 1 to 20 carbon atoms, alkoxy groups containing 1 to 20 carbon atoms, heteroatoms and combinations thereof.

[0054] Preferably, in general formula (VI), R 39 -R 42 At least one of them is selected from substituted hydrocarbon groups containing 1 to 20 carbon atoms, unsubstituted hydrocarbon groups containing 1 to 20 carbon atoms, and combinations thereof.

[0055] Preferably, in general formula (VI), R 43 -R 52 At least one of them is selected from substituted hydrocarbon groups containing 1 to 20 carbon atoms, unsubstituted hydrocarbon groups containing 1 to 20 carbon atoms, alkoxy groups containing 1 to 20 carbon atoms, heteroatoms, and combinations thereof.

[0056] Preferably, the compounds represented by general formula (VI) include, but are not limited to, those selected from:

[0057] 1,2-Ceramide-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0058] 1,2-Ceramide-3-methyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0059] 1,2-Ceramide-3-methoxy-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0060] 1,2-Ceramide-3-ethyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0061] 1,2-Ceramide-3-propyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0062] 1,2-Ceramide-3-isobutyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0063] 1,2-Ceramide-3-n-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0064] 1,2-Ceramide-3-ethoxy-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0065] 1,2-Ceramide-4-methyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0066] 1,2-Ceramide-4-ethyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0067] 1,2-Ceramide-4-propyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0068] 1,2-Ceramide-4-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0069] 1,2-Ceramide-4-isopentyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0070] 1,2-Ceramide-4-formyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0071] 1,2-Ceramide-4-acetyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0072] 1,2-Ceramide-4-hydroxy-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0073] 1,2-Cephedrol-4-chloro-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0074] 1,2-Ceramide-4-bromo-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0075] 1,2-Cephedrol-3,4-dimethyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0076] 1,2-Ceramide-3,4-dimethoxy-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0077] 1,2-Cephedrol-3,4-dichloro-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0078] 1,2-Ceramide-3-methyl-5-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0079] 1,2-Ceramide-3,5-di-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0080] 1,2-Ceramide-3,5-diisopropyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0081] 1,2-Ceramide-3,5-dimethoxy-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0082] 1,2-Cephedrol-3,6-dimethyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0083] 1,2-Ceramide-3,6-di-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0084] 1,2-Cephedrol-3,6-dimethyl-4-isopropyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0085] 1,2-Ceramide-3-isopropyl-4,5-dimethyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0086] 1,2-Ceramide-4-ethyl-5-isobutyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0087] 1,2-Ceramide-4-ethyl-5-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0088] 1,2-Ceramide-3-methoxy-5-methyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0089] 1,2-Ceramide-3,4,6-trimethyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0090] 1,2-Ceramide-3,4,6-triisopropyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate].

[0091] The above-mentioned compound is further preferably:

[0092] 1,2-Ceramide-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0093] 1,2-Ceramide-3-methyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0094] 1,2-Ceramide-3-n-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0095] 1,2-Ceramide-4-methyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0096] 1,2-Ceramide-4-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0097] 1,2-Ceramide-3-methyl-5-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0098] 1,2-Cephedrol-3,6-dimethyl-1,2-di[benzoic acid ester, 2-methylbenzoic acid ester, 2-isopropylbenzoic acid ester, 4-methylbenzoic acid ester, 4-n-propylbenzoic acid ester, 4-isopropylbenzoic acid ester, 4-n-butylbenzoic acid ester, 4-tert-butylbenzoic acid ester, 4-isobutylbenzoic acid ester, 4-aminobenzoic acid ester, 4-fluorobenzoic acid ester, 2-chlorobenzoic acid ester, 3-chlorobenzoic acid ester, 4-chlorobenzoic acid ester, 2,4,6-trimethylbenzoic acid ester, 3-methoxybenzoic acid ester, 4-methoxybenzoic acid ester];

[0099] 1,2-Ceramide-3,6-di-tert-butyl-1,2-di[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate];

[0100] 1,2-Ceramide-3,4,6-trimethyl-1,2-bis[benzoate, 2-methylbenzoate, 2-isopropylbenzoate, 4-methylbenzoate, 4-n-propylbenzoate, 4-isopropylbenzoate, 4-n-butylbenzoate, 4-tert-butylbenzoate, 4-isobutylbenzoate, 4-aminobenzoate, 4-fluorobenzoate, 2-chlorobenzoate, 3-chlorobenzoate, 4-chlorobenzoate, 2,4,6-trimethylbenzoate, 3-methoxybenzoate, 4-methoxybenzoate].

[0101] Preferably, the catalyst component comprises a titanium compound, a magnesium compound, the 2,6-dimethoxycarbonyl-substituted 4-pyranone, and a Lewis base compound;

[0102] The precursor of the magnesium compound is selected from X. n Mg(OR a ) 2-n MgCl2·mRa OH, R a 2-n MgX n At least one of the following: a mixture of MgCl2 / SiO2, MgCl2 / Al2O3, magnesium halide, and titanium alkoxide, wherein m is 0.1-6, 0≤n≤2, X is a halogen, and R a For C1-C 20 hydrocarbon group;

[0103] The general formula of the titanium compound is TiX. N (OR b ) 4-N In the formula, R b For C1-C 20 The hydrocarbon group, where X is a halogen and N is 1-4.

[0104] Preferably, the magnesium compound is an alkoxide of magnesium dihalide;

[0105] Alternatively, the magnesium compound may be a liquid magnesium compound;

[0106] Alternatively, the magnesium compound is a derivative in which at least one halogen atom in a magnesium dihalide molecule is replaced by a hydroxyl group or a halohydroxyl group; preferably, it is a hydroxyl-based magnesium compound; more preferably, it is an alkoxyl-based magnesium compound and / or an aryl-based magnesium compound.

[0107] Preferably, the titanium compound comprises titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, or alkyl titanium halide, wherein the alkyl titanium halide includes, but is not limited to, at least one of methoxy titanium trichloride, ethoxy titanium trichloride, propoxy titanium trichloride, n-butoxy titanium trichloride, dimethoxy titanium dichloride, diethoxy titanium dichloride, dipropoxy titanium dichloride, di-n-butoxy titanium dichloride, trimethoxy titanium chloride, triethoxy titanium chloride, tripropoxy titanium chloride, and tri-n-butoxy titanium chloride; wherein these alkyl titanium halides may be used in combination or in one or more forms. The titanium compound of the present invention is preferably titanium tetrachloride.

[0108] According to a specific embodiment of the present invention, preferably, the molar ratio of the sum of the internal electron donor compound a and the internal electron donor compound b to the magnesium compound is 0.01-5.0, more preferably 0.05-3.0, wherein the magnesium compound is calculated in terms of magnesium element.

[0109] This invention does not specifically limit the preparation method of the olefin polymerization catalyst component, which can be carried out according to the following methods:

[0110] Method 1: A solution of titanium compounds (such as TiCl4 or hydroxyl titanium) in aromatic hydrocarbons (e.g., toluene, xylene, etc.) is reacted with magnesium compounds (such as dialkoxymagnesium or diaryloxymagnesium) at -25–0 °C, followed by halogenation at 80–130 °C. The treatment with the TiCl4 aromatic hydrocarbon solution can be repeated once or multiple times, using at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound. For example, the preparation method of the titanium-containing solid catalyst component disclosed in US5077357A can be used: ethoxymagnesium, tetraethoxytitanium, o-cresol, ethanol, and chlorobenzene are added sequentially and stirred; a TiCl4 / chlorobenzene solution is rapidly added to the above liquid, and the temperature is raised until complete dissolution, then the temperature is further raised to 80–130 °C; the ethanol reactants are removed by bubbling with N2, and stirring is continued for a certain period of time, followed by washing once with hot chlorobenzene, twice with isooctane, and then drying with N2 to obtain the support. Alternatively, follow another example: add TiCl4, tetraethoxytitanium, ethoxymagnesium, and o-cresol to chlorobenzene in sequence and stir; add ethanol, and continue stirring for 3 hours after the ethoxymagnesium dissolves at high temperature; filter while hot, then wash once with warm chlorobenzene, wash once with isooctane, and finally dry with N2.

[0111] Method 2: An excess of TiCl4 containing a magnesium compound (such as an alkoxide or chloroalkoxide of magnesium) and at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound is reacted at a temperature of 80-135°C. According to the preferred method, TiX can be... N (OR b ) 4-N Titanium compounds (where R) b For C1-C 20 The hydrocarbon group, where X is a halogen and N is 1-4; preferably TiCl4) and the general formula MgCl2·mR a OH (where m is a number from 0.1 to 6, preferably 2 to 4, and R) a For C1-C 20 Solid catalyst components are prepared by reacting adducts of hydrocarbon groups. The adducts can be suitably sphericalized by mixing an alcohol and magnesium chloride in the presence of an inert hydrocarbon immiscible with the adduct, followed by rapid quenching of the emulsion, thereby solidifying the adduct into spherical particles. Spherical MgCl2·mR particles prepared according to this process... aExamples of OH adducts can be described in US4399054A and US4469648A. The adducts thus obtained can react directly with titanium compounds, or they can be pre-treated with a thermally controlled dealcoholization process (80-130°C) to yield an adduct, wherein the molar number of the alcohol is generally less than 3, preferably between 0.1 and 2.5. The reaction with titanium compounds can be carried out by suspending the adduct (dealcoholized or otherwise) in cold TiCl4 (generally -25 to 0°C); the mixture is then heated to 80-130°C and held at this temperature for 0.5-2 hours. The treatment with TiCl4 can be performed once or multiple times. During the TiCl4 treatment, at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound can be added; this treatment can be repeated once or multiple times.

[0112] Method 3: Anhydrous magnesium chloride and at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound are co-milled under conditions where magnesium chloride is activated. The product thus obtained can be treated once or multiple times with an excess of TiCl4 at a temperature of 80-130°C. After treatment, it is washed with a hydrocarbon volume until no chloride ions are present. According to a further method, the product obtained by co-milling anhydrous magnesium chloride, a titanium compound, and at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound is treated with a haloalkane such as 1,2-dichloroethane, chlorobenzene, or dichloromethane. This treatment is carried out at a temperature between 40°C and the boiling point of the haloalkane for 1-4 hours. Then, it is usually washed with an inert hydrocarbon volume such as hexane to obtain the product.

[0113] Method 4: Magnesium dichloride can be pre-activated using known methods, and then treated with an excess of TiCl4 at a temperature of approximately 80-135°C, wherein the solution contains at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound. The solid is treated with TiCl4 multiple times and washed with hexane to remove any unreacted TiCl4.

[0114] Method 5: Alternatively, the preparation method of the titanium-containing solid catalyst component disclosed in CN1208045A can be used: First, at low temperature, liquid magnesium compound and liquid titanium compound are contacted in the presence of a compound selected from alcohols, phenols, ketones, aldehydes, ethers, amines, pyridines and esters to precipitate solids. The contact temperature is generally -70 to 200°C, preferably -30 to 130°C. During the contact process, at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound are used for treatment.

[0115] Method Six: A magnesium compound is dissolved in a solvent system consisting of an organic epoxy compound, an organophosphorus compound, and an inert diluent to form a homogeneous solution. This solution is then mixed with a titanium compound, and a solid is eluted in the presence of a precipitation aid. This solid is treated with at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound to load the solid onto the solution. If necessary, further treatment with titanium tetrahalide and an inert diluent is performed. The precipitation aid is one of an organic acid anhydride, an organic acid, an ether, or a ketone. The components, per mole of magnesium halide, are: 0.2-10 mol of organic epoxy compound, 0.1-3 mol of organophosphorus compound, 0.03-1.0 mol of precipitation aid, and 0.5-150 mol of transition metal Ti halide and its derivatives.

[0116] Method 7: A magnesium compound supported on inorganic oxides such as SiO2 or alumina or a porous resin is used as a support to prepare the product. The product is then activated by a known method and treated with an excess of TiCl4 at a temperature of about 80-135°C. During the treatment, at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound are added.

[0117] The reactions discussed above lead to the formation of magnesium halides in an active form (typical crystalline magnesium halides have a regular structure and can support very little Ti, resulting in low catalytic activity; to prepare highly active supported catalysts, magnesium halides must undergo activation treatment. Activation methods include using physical and / or chemical methods to prepare them into microcrystals so that active centers are supported on the surface, edges, and defects of the magnesium halide; these treated magnesium halide microcrystals suitable for supporting Ti are called "active magnesium halides"). In addition to these reactions, other methods are known in the literature for forming active magnesium halides from starting materials different from magnesium halides.

[0118] In any of the preparation methods described above, the internal electron donor compound can be added directly or optionally prepared in situ using a suitable precursor that can be converted in the desired internal electron donor compound via known chemical reactions such as esterification or transesterification. Typically, the internal electron donor compound is used in a molar ratio of 0.01-5, preferably 0.05-3.0, relative to MgCl2.

[0119] In any of the preparation methods described above, the internal electron donor compound (at least one 2,6-dimethoxycarbonyl-substituted 4-pyranone compound selected from general formula (I) and at least one Lewis base compound) may be added simultaneously or separately during the preparation process in batches or in any order or combination.

[0120] The present invention also provides an olefin polymerization catalyst, wherein the olefin polymerization catalyst comprises the above-described catalyst components.

[0121] The present invention also provides a catalyst for olefin polymerization, the raw material composition of which includes the above-mentioned catalyst components and organoaluminum compounds.

[0122] According to a specific embodiment of the present invention, preferably, the organoaluminum compound has the general formula AlR c p X (3-p) , where R c It is hydrogen or C1-C 20 The hydrocarbon group, X is a halogen, and p is an integer 0 ≤ p ≤ 3.

[0123] According to a specific embodiment of the present invention, preferably, the organoaluminum compound includes at least one of trialkylaluminum compound, alkylaluminum halide, alkylaluminum hydride, alkylaluminum sesquichloride, and alkylaluminoxane.

[0124] According to a specific embodiment of the present invention, preferably, the trialkylaluminum compound includes at least one selected from trimethylaluminum, triethylaluminum, triisobutylaluminum, tri-n-butylaluminum, tri-n-hexylaluminum, and trioctylaluminum; the alkylaluminum halide includes AlEt2Cl; and the alkylaluminum sesquichloride includes Al2Et3Cl3.

[0125] According to a specific embodiment of the present invention, preferably, the molar ratio of the organoaluminum compound to the titanium atoms in the catalyst component is 1-1000:1, more preferably 50-800.

[0126] According to a specific embodiment of the present invention, preferably, the raw material composition of the catalyst further includes an external electron donor.

[0127] According to a specific embodiment of the present invention, preferably, the external electron donor is a siloxane compound.

[0128] According to a specific embodiment of the present invention, preferably, the general formula of the siloxane compound is R'. t Si(OR”) 4-t In this context, R' and R” are each independently selected from C1-C 18 The hydrocarbon group, where t is an integer of 0 ≤ t ≤ 3; more preferably, R' and R” respectively contain heteroatoms; more preferably, the heteroatoms include at least one of N, O, S, P, and Si.

[0129] According to a specific embodiment of the present invention, preferably, the siloxane compound includes trimethylmethoxysilane, trimethylethoxysilane, tri-n-propylmethoxysilane, tri-n-propylethoxysilane, tri-n-butylmethoxysilane, triisobutylethoxysilane, tricyclohexylmethoxysilane, tricyclohexylethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, di-n-propyldimethoxysilane, diisopropyldimethoxysilane, di-n-propyldiethoxysilane, diisopropyldiethoxysilane, di-n-butyldiethoxysilane, diisobutyldiethoxysilane, di-tert-butyldimethoxysilane, di-tert-butyldimethoxysilane, di-n-butyldimethoxysilane, diisobutyldimethoxysilane, diisobutyldimethoxysilane, di-tert- ... Silane, di-tert-butyldiethoxysilane, di-n-butyldiethoxysilane, n-butylmethyldimethoxysilane, di(2-ethylhexyl)dimethoxysilane, di(2-ethylhexyl)diethoxysilane, dicyclohexyldimethoxysilane, dicyclohexyldiethoxysilane, dicyclohexyldimethoxysilane, dicyclopentyldimethoxysilane, dicyclopentyldiethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylmethyldiethoxysilane, cyclohexylethyldimethoxysilane, cyclohexylisopropyldimethoxysilane, cyclohexylethyldiethoxysilane, cyclopentylmethyldimethoxysilane, cyclopentylethyldiethoxysilane, cyclopentylisopropyldiethoxysilane, cyclopentylisobutyldimethoxysilane, cyclohexyl-n-propyl Dimethoxysilane, cyclohexyl-n-propyldiethoxysilane, cyclohexyl-n-butyldiethoxysilane, pentylmethyldimethoxysilane, pentylmethyldiethoxysilane, pentylethyldimethoxysilane, pentylethyldiethoxysilane, cyclohexyldimethylmethoxysilane, cyclohexyldiethylmethoxysilane, cyclohexyldiethylmethoxysilane, cyclohexyldiethylethoxysilane, 2-ethylhexyltrimethoxysilane, cyclohexyldimethoxysilane, cyclohexyldiethoxysilane, 2-ethylhexyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, isopropyltrimethoxysilane, isopropyltriethoxysilane, n-butyl 2-Ethylhexyltrimethoxysilane, isobutyltrimethoxysilane, tert-butyltrimethoxysilane, n-butyltriethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, cyclopentyltrimethoxysilane, cyclopentyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 2-ethylhexyltrimethoxysilane, 2-ethylhexyltriethoxysilane, pentyltrimethoxysilane, pentyltriethoxysilane, tetramethoxysilane, tetraethoxysilane, cyclohexylcyclopentyldimethoxysilane, cyclohexylcyclopentyldiethoxysilane, cyclohexylcyclopentyldipropoxysilane, 3-methylcyclohexylcyclopentyldimethoxysilane, 4-methylcyclohexylcyclopentyldimethoxysilane, 3,At least one of the following: 5-dimethylcyclohexylcyclopentyldimethoxysilane, 3-methylcyclohexylcyclohexyldimethoxysilane, di(3-methylcyclohexyl)dimethoxysilane, 4-methylcyclohexylcyclohexyldimethoxysilane, di(4-methylcyclohexyl)dimethoxysilane, 3,5-dimethylcyclohexylcyclohexyldimethoxysilane, di(3,5-dimethylcyclohexyl)dimethoxysilane, tetrapropoxysilane, and tetrabutoxysilane;

[0130] The siloxane compound more preferably includes at least one of di-n-propyl dimethoxysilane, diisopropyl dimethoxysilane, di-n-butyl dimethoxysilane, diisobutyl dimethoxysilane, di-tert-butyl dimethoxysilane, di-n-butyl diethoxysilane, tert-butyl trimethoxysilane, dicyclohexyl dimethoxysilane, dicyclohexyl diethoxysilane, cyclohexyl methyl dimethoxysilane, cyclohexyl ethyl diethoxysilane, cyclohexyl ethyl dimethoxysilane, cyclohexyl ethyl diethoxysilane, cyclopentyl methyl dimethoxysilane, cyclopentyl methyl diethoxysilane, cyclopentyl ethyl dimethoxysilane, cyclohexylcyclopentyl dimethoxysilane, cyclohexylcyclopentyl diethoxysilane, 3-methylcyclohexylcyclopentyl dimethoxysilane, 4-methylcyclohexylcyclopentyl dimethoxysilane, and 3,5-dimethylcyclopentyl dimethoxysilane.

[0131] According to a specific embodiment of the present invention, preferably, the molar ratio of silicon in the external electron donor to titanium in the catalyst component is 0.002-100, more preferably 0.01-20, and even more preferably 0.01-5.

[0132] The present invention also provides the application of the above-mentioned catalyst in olefin polymerization.

[0133] According to a specific embodiment of the present invention, preferably, the olefin includes straight-chain or branched olefins, such as at least one of ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 3-methyl-1-butene, 4-methyl-1-pentene, butadiene, vinylcyclopentene, and vinylcyclohexene.

[0134] According to a specific embodiment of the present invention, preferably, the polymerization includes ethylene and / or propylene polymerization.

[0135] According to a specific embodiment of the present invention, preferably, the polymerization includes homopolymerization or copolymerization.

[0136] According to a specific embodiment of the present invention, preferably, the order of adding the components in the catalyst during the catalytic process is arbitrary, with the organoaluminum compound being added to the polymerization system first, followed by the external electron donor, and finally the catalyst components.

[0137] According to a specific embodiment of the present invention, preferably, in the above applications, the polymerization process can be carried out with or without a solvent; the olefin monomer can be in the gas phase or liquid phase; more preferably, hydrogen can be further added as a molecular weight regulator (polymerization can also be carried out without a molecular weight regulator); continuous polymerization or batch polymerization processes can be applied, and the polymerization reaction can be carried out in one step, two steps or multiple steps.

[0138] According to a specific embodiment of the present invention, preferably, the polymerization temperature is ≤200℃, more preferably 20-100℃, and even more preferably 40-80℃; the polymerization pressure is ≤10MPa, preferably 0.3-5MPa.

[0139] The catalyst component of this invention, employing 2,6-dimethoxycarbonyl-substituted 4-pyranone as an internal electron donor, exhibits significantly enhanced activity when combined with a Lewis base compound. This catalyst yields polypropylene with high isotacticity, and even without an external electron donor, highly isotactic polyolefins can still be obtained. The catalyst of this invention produces polyolefins with a broad molecular weight distribution, particularly when combined with succinate esters, resulting in a significantly broadened molecular weight distribution, making it suitable for preparing high-rigidity polyolefins. Detailed Implementation

[0140] The technical solution of the present invention will now be described in detail with reference to embodiments thereof. Obviously, the described embodiments are only a part of the implementation of the present invention, and not all of them.

[0141] In all examples, the catalyst preparation operations were carried out under high-purity nitrogen protection. Polymer isotacticity was determined using the heptane extraction method (boiling heptane extraction for 6 hours). Two grams of dried polymer sample were placed in an extractor and extracted with boiling heptane for 6 hours. The residue was dried to constant weight. The ratio of the polymer weight (g) obtained to 2 is the isotacticity.

[0142] The bulk density of the polymer was determined using the method specified in JB / T 2412-2008.

[0143] The molecular weight distribution of the polymer was determined by PL-220 gel permeation chromatography at 150 °C with trichlorobenzene as solvent (standard: polystyrene, flow rate 1.0 mL / min, column: 3xPlgel 10um M1Xed-B 300x7.5nm).

[0144] Other Lewis base compounds: 9,9-bis(methoxymethyl)fluorene, commercially available, CAS No. 182121-12-6; 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, synthesized according to CN1041752A; di-n-butyl phthalate, commercially available, CAS No. 84-74-2; diethyl 2,3-diisopropylsuccinate, synthesized according to CN1313869A; diethyl 2,3-diisopropyl-2-cyanosuccinate, synthesized according to CN106608935A; 2,4-Pentanediol dibenzoate, synthesized according to CN1580038; 1,2-benzenediol-4-tert-butyl-1,2-diacetate, 1,2-benzenediol-4-tert-butyl-1,2-di-n-hexanoate, 1,2-benzenediol-1,2-dibenzoate, 1,2-benzenediol-4-tert-butyl-1,2-dibenzoate, 1,2-benzenediol-4-tert-butyl-1,2-di(m-chlorobenzoate), synthesized according to CN102325808A; ethyl benzoate, commercially available, CAS No. 93-89-0.

[0145] Synthesis of 2,6-dimethoxycarbonyl-substituted 4-pyranone compounds represented by general formula (I)

[0146] Preparation Example 1: Synthesis of 1,2,6-dimethoxycarbonylpropyl-4-pyranone

[0147] Sodium (14.2 g, 0.6 mol) was dissolved in anhydrous ethanol (200 mL). A mixture of anhydrous acetone (17.4 g, 22.8 mL, 0.3 mol) and diethyl oxalate (93 g, 86.5 mL, 0.64 mol) was added to the previous solution over 15 minutes. A yellow precipitate formed. The reaction mixture was kept at 60 °C for one hour. Then, HCl (aq. 37%, 120 mL) and water (60 mL) were added, and the solution was stirred at 50 °C for 20 hours. The mixture of water and ethanol was removed under reduced pressure. A mixture of water (170 mL) and HCl (aq. 37%, 30 mL) was then added to this mixture and stirred until silica gel TLC (elution buffer: 3 / 7 (v / v) 10% NaCl aqueous solution / ethanol) showed only one spot. After cooling to room temperature, the crystals were filtered off, washed first with water, then with cold acetone. The crude product was recrystallized to give a white powder, 4-pyranone-2,6-dicarboxylic acid.

[0148] In a 1L three-necked flask, 6.6 g of 4-pyranone-2,6-dicarboxylic acid, 120 mL of ethanol, and 0.72 mL of concentrated sulfuric acid were added; the mixture was heated under reflux for 2 hours and cooled to room temperature. The reaction mixture was poured into a saturated sodium bicarbonate solution and extracted twice with ethyl acetate (120 mL x 2). The organic phases were combined, washed with saturated brine (120 mL x 1), concentrated, recrystallized, and dissolved in 120 mL of anhydrous methanol. Sodium borohydride (3.8 g) was gradually added, and the mixture was cooled to -20°C in an ice-salt bath and stirred for 1 hour. The solvent was then removed, and the orange residue was dissolved in water (120 mL) and neutralized with 10% H₂SO₄ aqueous solution. The mixture was evaporated to dryness to give an orange solid product, which was dissolved in ethanol / ethyl acetate (9:1, 170 mL) and the reaction mixture was filtered. Recrystallization from ethanol / petroleum ether (2:1) gave a light brown powder, 2,6-dimethyl-4-pyranone.

[0149] In a 250 mL five-necked flask, add 15.5 g (0.1 mol) of 2,6-diethanol-4-pyranone, 4.9 g of dimethylpyridine, 36 mL of triethylamine, and 100 mL of THF, and stir to form a homogeneous solution. Cool to 10 °C, maintaining the temperature between 10-20 °C, and add dropwise a solution of 20 mL of propionyl chloride in 50 mL of THF. After the addition is complete, stir for 10 min, then heat to reflux and react overnight. Cool to room temperature, filter, concentrate the filtrate to near dryness, and add 200 mL of dichloromethane solution to the residue. Add an aqueous solution to the filter cake, combine the aqueous solution with the dichloromethane phase, and separate the layers. Wash the organic phase with 100 mL of HCl solution (1 mol / L), 100 mL of saturated sodium bicarbonate solution, and 100 mL of saturated brine, respectively. Dry the organic phase with anhydrous Na₂SO₄ and filter. Concentrate to dryness, and recrystallize the crude product.

[0150] Preparation Example 2-13: Synthesis of other 2,6-dimethoxycarbonyl-substituted 4-pyranone compounds

[0151] Using one of the aforementioned routes, the starting material is selected from oxalic acid or diethyl oxalate. After addition reaction with acetone or other ketones, it is reduced and then esterified with one or two acyl chlorides to obtain the corresponding substituted 2,6-dimethoxycarbonyl-4-pyranone product. When reacting with two acyl chlorides, a mixture of three products is obtained, which can be used directly as an internal electron donor composition without separation. The structures of other 2,6-dimethoxycarbonyl-4-pyranone compounds are shown in Table 1.

[0152]

[0153] General Formula (I)

[0154] Table 1. 2,6-Dimethoxycarbonyl-substituted 4-pyranone compounds prepared in Examples 1-13

[0155]

[0156]

[0157]

[0158] Catalyst preparation

[0159] Example 1

[0160] In a 500 mL stirred flask fully purged with nitrogen, 10 g of MgCl2·2.5C2H5OH microspheres and 150 mL of titanium tetrachloride were added to prepare a suspension. The suspension was then maintained at -15 °C for 1 hour, and slowly heated to 80 °C. 7 mmol of 2,6-dimethoxycarbonylethyl-4-pyranone and 3 mmol of diethyl 2,3-diisopropylsuccinate were added, and the temperature was further increased to 110 °C and held constant for 1 hour. The liquid was then filtered off, and the resulting solid was washed three times with 120 mL of titanium tetrachloride at 125 °C. The solid was then washed four times with 150 mL of hexane at 60 °C, the liquid was filtered off, and the solid was dried to obtain the solid catalyst component Cat-1.

[0161] Polymerization: After thorough purging with nitrogen in a 5L stainless steel reactor, 5 mL of a 0.5 mol / L triethylaluminum hexane solution and 1 mL of a 0.1 mol / L cyclohexylmethyldimethoxysilane hexane solution, along with 10 mg of the prepared catalyst, were added. Then, 10 mL of hexane was added to flush the feed line, followed by 2 L (under standard conditions) of hydrogen and 2.5 L of purified propylene. The reaction was prepolymerized at 25°C for 5 minutes, then the temperature was raised to 70°C, and polymerization was carried out at this temperature for 1 hour. After the reaction, the reactor was cooled, stirring was stopped, and the reaction product was discharged and dried to obtain the polymer. Polymerization data are shown in Table 1.

[0162] Example 2-13

[0163] The preparation process of the solid catalyst components is as shown in Example 1, except that 2,6-dimethoxycarbonylethyl-4-pyranone is replaced with 7 mmol of compounds a2-a13 in Table 1 in sequence.

[0164] Example 14

[0165] The solid catalyst component was prepared as in Example 1, except that 5 mmol of 2,6-dimethoxycarbonylethyl-4-pyranone and 5 mmol of diethyl 2,3-diisopropylsuccinate were added.

[0166] Example 15

[0167] The solid catalyst component was prepared as in Example 1, except that 2 mmol of 2,6-dimethoxycarbonylethyl-4-pyranone and 8 mmol of diethyl 2,3-diisopropylsuccinate were added.

[0168] Example 16

[0169] The solid catalyst component was prepared as in Example 1, except that 6 mmol of 2,6-dimethoxycarbonylethyl-4-pyranone and 4 mmol of diethyl 2,3-diisopropylsuccinate were added.

[0170] Examples 17-37

[0171] The solid catalyst component preparation process is as shown in Example 1, except that 7 mmol of type a internal electron donor and 3 mmol of type b internal electron donor are added according to the internal electron donor numbers shown in Table 2.

[0172] Examples 38-45

[0173] The solid catalyst component preparation process is as shown in Example 1, except that three internal electron donor compounds of 5 mmol / 3 mmol / 2 mmol were added according to the internal electron donor numbers shown in Table 2.

[0174] Examples 46-48

[0175] The preparation process of the solid catalyst components is as shown in Example 1, except that the internal electron donor compounds a1, b4, and b7 are added according to the molar ratio shown in Table 2 (total feed amount is 10 mmol).

[0176] Comparative Example 1

[0177] The catalyst component was prepared as in Example 1, except that 7 mmol of the internal electron-donating compound a1 and 3 mmol of the internal electron-donating compound b4 were replaced with 10 mmol of 2,6-dimethoxycarbonylethyl-4-pyranone (a1).

[0178] Comparative Example 2

[0179] The catalyst component was prepared as in Example 1, except that 7 mmol of the electron-donating compound a1 and 3 mmol of the internal electron-donating compound b4 were replaced with 10 mmol of 2,6-dimethoxycarbonylphenyl-4-pyranone (a5).

[0180] Comparative Example 3

[0181] The catalyst component was prepared as in Example 1, except that 7 mmol of the internal electron-donating compound a1 and 3 mmol of the internal electron-donating compound b4 were replaced with 10 mmol of 2,6-dimethoxycarbonyl-m-chlorophenyl-4-pyranone (a6).

[0182] Comparative Example 4

[0183] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4 internal electron-donating compound were replaced with 10 mmol of 9,9-bis(methoxymethyl)fluorene (b1).

[0184] Comparative Example 5

[0185] The catalyst component was prepared as in Example 1, except that 7 mmol of the electron-donating compound a1 and 3 mmol of the internal electron-donating compound b4 were replaced with 10 mmol of di-n-butyl phthalate (b3).

[0186] Comparative Example 6

[0187] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4, the internal electron donor compound, were replaced with 10 mmol of diethyl 2,3-diisopropylsuccinate (b4).

[0188] Comparative Example 7

[0189] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4, the internal electron donor compound, were replaced with 10 mmol of 1,2-dibenzenediol-4-tert-butyl-1,2-dibenzoate (b7).

[0190] Comparative Example 8

[0191] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4 internal electron donor compound were replaced with 7 mmol of b1 and 3 mmol of b4.

[0192] Comparative Example 9

[0193] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4 internal electron donor compound were replaced with 7 mmol of b3 and 3 mmol of b4.

[0194] Comparative Example 10

[0195] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4 internal electron donor compound were replaced with 5 mmol of b1, 3 mmol of b3 and 2 mmol of b4 electron donor.

[0196] Comparative Example 11

[0197] The catalyst component was prepared as in Example 1, except that 7 mmol of a1 and 3 mmol of b4 internal electron donor compound were replaced with 5 mmol of b1, 3 mmol of b4 and 2 mmol of b6 electron donor.

[0198] Table 2 Results of different compound formulations under the same polymerization conditions

[0199]

[0200]

[0201]

[0202]

[0203]

[0204] [Note] b1: 9,9-bis(methoxymethyl)fluorene;

[0205] b2: 2-Isopropyl-2-isopentyl-1,3-dimethoxypropane;

[0206] b3: Dibutyl phthalate;

[0207] b4: Diethyl 2,3-diisopropylsuccinate;

[0208] b5: Diethyl 2,3-diisopropyl-2-cyanosuccinate;

[0209] b6: 1,2-benzenediol-4-tert-butyl-1,2-dihexanoate;

[0210] b7: 1,2-benzenediol-4-tert-butyl-1,2-dibenzoate;

[0211] b8: Ethyl benzoate.

[0212] As shown in Table 2, the activity of 2,6-dimethoxycarbonyl-substituted 4-pyranone as an internal electron donor compound, when combined with various Lewis base compounds, is significantly improved. This improvement surpasses that of uncombined single internal electron donor catalysts (Comparative Examples 1-7) and also exceeds that of combined internal electron donor catalysts without 2,6-dimethoxycarbonyl-substituted 4-pyranone (Comparative Examples 8-11), exhibiting a wider molecular weight distribution. The catalyst prepared by combining 2,6-dimethoxycarbonyl-substituted 4-pyranone with succinate ester shows a significantly wider molecular weight distribution compared to 2,6-dimethoxycarbonyl-substituted 4-pyranone, making it suitable for preparing high-rigidity polypropylene. The polypropylene obtained from this catalyst exhibits high isotacticity, regular particle shape, and high bulk density.

[0213] Examples 49-52

[0214] After purging the 5L stainless steel reactor with nitrogen, 5mL of a 0.5mol / L triethylaluminum hexane solution, 1mL of a 0.1mol / L hexane solution containing the external electron donors shown in Table 3, and 10mg of Cat-1 catalyst were added. Then, 10mL of hexane was added to flush the feed line, followed by 2L (under standard conditions) of hydrogen and 2.5L of purified propylene. The reaction was prepolymerized at 25℃ for 5 minutes, then the temperature was raised to 70℃, and polymerization was carried out at this temperature for 1 hour. After the reaction, the reactor was cooled and stirring was stopped, and the reaction product was discharged and dried to obtain the polymer. Polymerization data are shown in Table 3.

[0215] Examples 53-56

[0216] After the 5L stainless steel reactor was fully purged with nitrogen, 5 mL of a 0.5 mol / L triethylaluminum hexane solution, 1 mL of a 0.1 mol / L hexane solution containing the external electron donors shown in Table 3, and 10 mg of Cat-48 catalyst were added. Then, 10 mL of hexane was added to flush the feed line, followed by 2 L (under standard conditions) of hydrogen and 2.5 L of purified propylene. The reaction was prepolymerized at 25°C for 5 minutes, then the temperature was raised to 70°C and polymerized at this temperature for 1 hour. After the reaction, the reactor was cooled and stirring was stopped, and the reaction product was discharged and dried to obtain the polymer. Polymerization data are shown in Table 3.

[0217] Table 3 Different external electron donors

[0218]

[0219] [Note] CMMS: Methylcyclohexyldimethoxysilane;

[0220] DPDMS: Dicyclopentyldimethoxysilane;

[0221] PETS: Phenylacetyltrimethoxysilane;

[0222] NPTMS: n-propyltrimethoxysilane.

[0223] Examples 57-68

[0224] After the 5L stainless steel reactor was fully purged with nitrogen, a 0.5mol / L triethylaluminum hexane solution (the amount of triethylaluminum is shown in Table 4 as Al / Ti) and the corresponding catalyst from Table 4 were added. Then, 10mL of hexane was added to flush the feed line, followed by 2L (under standard conditions) of hydrogen and 2.5L of refined propylene. The reaction was prepolymerized at 20℃ for 5 minutes, then the temperature was raised to 70℃, and the polymerization reaction was carried out at this temperature for the corresponding time (see Table 4). After the reaction was completed, the reactor was cooled and stirring was stopped, and the reaction product was discharged and dried to obtain the polymer. The results are shown in Table 4.

[0225] Comparative Examples 12-18

[0226] The polymerization steps are the same as in Example 58, except that the catalysts are those listed in Table 4.

[0227] Table 4 (Without external electron donors)

[0228]

[0229] As can be seen from Table 3, the catalysts CAT-1 and CAT-48, prepared by combining two or more internal electron donor compounds, exhibited high activity, high isotacticity, high bulk density, good polymerization compatibility, and a wide molecular weight distribution when polymerized with different external electron donors.

[0230] As shown in Table 4, the polymer maintained a high isotacticity even without the use of an external electron donor, and its polymerization activity was further improved, exhibiting ultra-high activity, far exceeding that of non-composite catalysts and composite internal electron donor catalysts without 2,6-dimethoxycarbonyl-substituted 4-pyranone (Comparative Examples 12-16). When the polymerization time of Cat-1 and Cat-48 was extended from 60 minutes to 120 minutes, the catalyst maintained its ultra-high activity without degradation. The polypropylene obtained using a low Al / Ti ratio had a lower ash content, which could be reduced to 23 ppm. It also exhibited a wider molecular weight distribution.

[0231] This invention is not limited to the specific embodiments described above. Any changes or modifications made by those skilled in the art within the scope of this invention are covered by the patent scope of this invention.

Claims

1. A catalyst component for olefin polymerization, characterized in that, It comprises Mg, Ti, halogen, at least one internal electron donor a compound and at least one internal electron donor b compound, wherein the internal electron donor a compound is selected from 2,6-dimethoxycarbonyl-substituted-4-pyranone of general formula (I), and the internal electron donor b compound is selected from Lewis base compounds; In general formula (I), R 1 R 2 R 3 and R 4 Whether the elements are the same or different, they are each independently selected from H, halogens, and C1-C. 20 The hydrocarbon group, optionally, contains at least one heteroatom selected from N, O, S, P, Si and halogens; Or, R 1 R 2 R 3 and R 4 Two or more of them bond together to form a ring.

2. The catalyst component for olefin polymerization according to claim 1, characterized in that, R in general formula (I) 1 R 2 R 3 and R 4 The substituents may be the same or different, and are each independently selected from H, halogens, or the following substituents with 20 or fewer carbon atoms: straight-chain or branched alkyl, cycloalkyl, alkenyl, ester, phenyl, alkylphenyl, phenylalkyl, indenyl; or each independently selected from the following substituents with 20 or fewer carbon atoms: halogenated or substituted with N, O, S, P, or Si heteroatoms, alkyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, indenyl; or each independently selected from heterocyclic aryl substituents.

3. The catalyst component for olefin polymerization according to claim 2, characterized in that, The phenylalkyl group includes benzyl.

4. The catalyst component for olefin polymerization according to claim 1, characterized in that, R in general formula (I) 1 R 2 R 3 and R 4 Whether the groups are the same or different, each is independently selected from H, halogen, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, cyclopentyl, n-hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, C 11 ~C 20 The following substituents with 20 or fewer carbon atoms, whether straight-chain or branched alkyl groups: alkenyl, phenyl, m-chlorophenyl, p-chlorophenyl, o-chlorophenyl, m-methoxyphenyl, p-methoxyphenyl, o-methoxyphenyl, p-methylphenyl, p-nitrophenyl, m-nitrophenyl, substituted benzyl, substituted phenethyl, furanyl, pyrroleyl, thiophenyl, indene.

5. The catalyst component for olefin polymerization according to claim 4, characterized in that, The alkenyl group includes at least one of propenyl, butenyl, pentenyl, and hexenyl.

6. The catalyst component for olefin polymerization according to claim 1, characterized in that, The 2,6-dimethoxycarbonyl-substituted 4-pyranone of general formula (I) is selected from 2,6-dimethoxycarbonylethyl-4-pyranone, 2,6-dimethoxycarbonylpropyl-4-pyranone, 2,6-dimethoxycarbonylbutyl-4-pyranone, 2,6-dimethoxycarbonylpentyl-4-pyranone, 2,6-dimethoxycarbonylcyclohexyl-4-pyranone, 2,6-dimethoxycarbonyloctyl-4-pyranone, 2,6-dimethoxycarbonyldodecyl-4-pyranone, 2,6-dimethoxycarbonyltetradecyl-4-pyranone, 2,6-dimethoxycarbonylhexadecyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-4-pyranone, 2,6-dimethoxycarbonylm-chlorophenyl-4-pyranone, 2,6-dimethoxycarbonylo-chlorophenyl-4-pyranone, 2 At least one of the following: 2,6-dimethoxycarbonyl-p-chlorophenyl-4-pyranone, 2,6-dimethoxycarbonyl-p-methoxyphenyl-4-pyranone, 2,6-dimethoxycarbonyl-p-nitrophenyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-dimethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-diethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-dipropyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-diethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3,5-dibutyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3-methyl-5-ethyl-4-pyranone, 2,6-dimethoxycarbonylphenyl-3-ethyl-5-butyl-4-pyranone, and 2,6-dimethoxycarbonylphenyl-3-methyl-5-butyl-4-pyranone.

7. The catalyst component for olefin polymerization according to claim 1, characterized in that, The molar ratio of the internal electron donor compound a to the internal electron donor compound b is greater than or equal to 2:

8.

8. The catalyst component for olefin polymerization according to claim 1, characterized in that, The Lewis base compound contains one or more electronegative groups, wherein the electron-donating atom is selected from N, O, S, P, As or Sn.

9. The catalyst component for olefin polymerization according to claim 1, characterized in that, The Lewis base compounds are selected from electron-donating compounds of diethers, esters, diketones, and diamines.

10. The catalyst component for olefin polymerization according to claim 9, characterized in that, The esters include at least one of monocarboxylic acid esters and polycarboxylic acid esters.

11. The catalyst component for olefin polymerization according to claim 9, characterized in that, The Lewis base compounds are selected from 1,3-diether compounds of general formula (II): In general formula (II), R 5 -R 10 Whether the groups are the same or different, each is independently selected from H, or each is independently selected from straight-chain or branched alkyl, cycloalkyl, aryl, alkylaryl, or aralkyl groups containing 1-18 carbon atoms; R 11 and R 12 Whether identical or different, each independently selected from straight-chain or branched alkyl groups of 1-20 carbon atoms, cycloalkyl groups of 3-20 carbon atoms, aryl groups of 5-20 carbon atoms, alkylaryl groups of 7-20 carbon atoms, and aralkyl groups, optionally, R 5 -R 12 Each of them also contains at least one heteroatom selected from halogens, N, O, S, P and Si; Or, R 5 -R 12 Multiple groups in it are linked together to form a ring structure.

12. The catalyst component for olefin polymerization according to claim 9, characterized in that, The electron-donating compounds of the diether class are selected from the diether classes represented by general formula (III): In general formula (III), R 19 -R 26 Whether identical or different, each independently selected from hydrogen, halogen, straight-chain or branched alkyl, cycloalkyl, aryl, alkylaryl, and arylalkyl groups with 1-20 carbon atoms, 3-20 carbon atoms, aryl, alkylaryl, and arylalkyl groups with 7-20 carbon atoms, optionally containing at least one heteroatom selected from N, O, S, P, Si, and halogens as a substituent for a carbon atom or to replace a hydrogen atom; R 13 -R 16 Whether the groups are the same or different, each is independently selected from H, or each is independently selected from straight-chain or branched alkyl, cycloalkyl, aryl, alkylaryl, or aralkyl groups containing 1-18 carbon atoms; R 17 and R 18 The same or different, each independently selected from straight-chain or branched alkyl groups of 1-20 carbon atoms, cycloalkyl groups of 3-20 carbon atoms, aryl groups of 5-20 carbon atoms, alkylaryl groups of 7-20 carbon atoms, and aralkyl groups; optionally, R 13 -R 18 Each of them also contains at least one heteroatom selected from halogens, N, O, S, P and Si; Or, R 13 -R 18 Multiple groups in it are linked together to form a ring structure.

13. The catalyst component for olefin polymerization according to claim 9, characterized in that, The polycarboxylic acid ester compounds are aromatic dicarboxylic acid ester compounds or aliphatic chain dicarboxylic acid ester compounds.

14. The catalyst component for olefin polymerization according to claim 9, characterized in that, The polycarboxylic acid ester compounds are succinate compounds represented by general formula (IV): In general formula (IV), R 27 and R 28 Whether the two are the same or different, they are each independently selected from C1-C. 20 Linear or branched alkyl, alkenyl, cycloalkyl, aryl, aralkyl, or alkylaryl groups, optionally containing heteroatoms; R 29 - R 32 At least two groups are different from hydrogen and are selected from C1-C1. 20 Linear or branched alkyl, alkenyl, cycloalkyl, aryl, aralkyl or alkylaryl groups, optionally containing heteroatoms; Or, R 29 - R 32 They are connected together to form a ring.

15. The catalyst component for olefin polymerization according to claim 14, characterized in that, R 27 and R 28 They may be the same or different, and are each independently selected from C1-C8 alkyl, cycloalkyl, aryl, aralkyl and alkylaryl groups.

16. The catalyst component for olefin polymerization according to claim 14, characterized in that, R 27 and R 28 Selected from primary alkyl groups.

17. The catalyst component for olefin polymerization according to claim 14, characterized in that, R 27 and R 28 Selected from methyl, ethyl, n-propyl, n-butyl, isobutyl, neopentyl, and 2-ethylhexyl.

18. The catalyst component for olefin polymerization according to claim 14, characterized in that, R 32 It is a branched primary alkyl group or cycloalkyl group having 3-10 carbon atoms.

19. The catalyst component for olefin polymerization according to claim 14, characterized in that, R 29 -R 32 Two non-hydrogen groups are attached to the same carbon atom.

20. The catalyst component for olefin polymerization according to claim 14, characterized in that, The succinate compounds are disubstituted succinate compounds.

21. The catalyst component for olefin polymerization according to claim 14, characterized in that, In general formula (IV), at least two non-hydrogen groups are attached to different carbon atoms.

22. The catalyst component for olefin polymerization according to claim 14, characterized in that, In general formula (IV), at least two non-hydrogen groups are attached to R. 29 and R 31 Or R 30 and R 32 superior.

23. The catalyst component for olefin polymerization according to claim 14, characterized in that, In general formula (IV), the group R attached to the same carbon atom 29 -R 32 Two or four of them are connected together to form a loop.

24. The catalyst component for olefin polymerization according to claim 9, characterized in that, The ester compound is an ortho-phenylene diester of general formula (V): In the general formula (V), R 33 and R 34 The C1-C molecules, whether identical or different, are independently selected from substituted or unsubstituted straight or branched chains. 20 Alkyl, C3-C 20 cycloalkyl, C6-C 20 Substituted or unsubstituted aryl groups, C7-C 20 Substituted or unsubstituted aralkyl, C2-C 10 olefin group, C 10 -C 20 The ester group, and R 33 and R 34 Not hydrogen; R 35 -R 38 Whether identical or different, each is independently selected from hydrogen, substituted or unsubstituted C1-C. 20 hydrocarbon groups, C1-C 20 Alkoxy groups, heteroatoms.

25. The catalyst component for olefin polymerization according to claim 24, characterized in that, C6-C 20 Substituted or unsubstituted aryl groups include C 10 -C 20 Fused ring aryl groups.

26. The catalyst component for olefin polymerization according to claim 9, characterized in that, The ester compounds are those represented by general formula (VI): In general formula (VI), R 39 -R 52 They may be the same or different, each independently selected from hydrogen, substituted hydrocarbon groups containing 1 to 20 carbon atoms, unsubstituted hydrocarbon groups containing 1 to 20 carbon atoms, alkoxy groups containing 1 to 20 carbon atoms, heteroatoms and combinations thereof.

27. The catalyst component for olefin polymerization according to claim 26, characterized in that, In general formula (VI), R 39 -R 42 At least one of them is selected from substituted hydrocarbon groups containing 1 to 20 carbon atoms, unsubstituted hydrocarbon groups containing 1 to 20 carbon atoms, and combinations thereof.

28. The catalyst component for olefin polymerization according to claim 26, characterized in that, In general formula (VI), R 43 -R 52 At least one of them is selected from substituted hydrocarbon groups containing 1 to 20 carbon atoms, unsubstituted hydrocarbon groups containing 1 to 20 carbon atoms, alkoxy groups containing 1 to 20 carbon atoms, heteroatoms, and combinations thereof.

29. The catalyst component for olefin polymerization according to claim 1, characterized in that, The catalyst component comprises titanium compounds, magnesium compounds, the 2,6-dimethoxycarbonyl-substituted 4-pyranone, and Lewis base compounds; The precursor of the magnesium compound is selected from X. n Mg(OR a ) 2-n MgCl2·mR a OH, R a 2-n MgX n At least one of the following: a mixture of MgCl2 / SiO2, MgCl2 / Al2O3, magnesium halide, and titanium alkoxide, wherein m is 0.1-6, 0≤n≤2, X is a halogen, and R a For C1-C 20 hydrocarbon group; The general formula of the titanium compound is TiX. N (OR b ) 4-N In the formula, R b For C1-C 20 The hydrocarbon group, where X is a halogen and N is 1-4.

30. The catalyst component for olefin polymerization according to claim 29, characterized in that, The magnesium compound is an alkoxide of magnesium dihalide; Alternatively, the magnesium compound may be a liquid magnesium compound; Alternatively, the magnesium compound is a derivative in which at least one halogen atom in a magnesium dihalide molecule is replaced by a hydrocarbon oxygen atom.

31. The catalyst component for olefin polymerization according to claim 29, characterized in that, The titanium compound includes at least one of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, and titanium alkoxyhalide.

32. The catalyst component for olefin polymerization according to claim 31, characterized in that, The alkoxy titanium halide includes at least one of methoxy titanium trichloride, ethoxy titanium trichloride, propoxy titanium trichloride, n-butoxy titanium trichloride, dimethoxy titanium dichloride, diethoxy titanium dichloride, dipropoxy titanium dichloride, di-n-butoxy titanium dichloride, trimethoxy titanium chloride, triethoxy titanium chloride, tripropoxy titanium chloride, and tri-n-butoxy titanium chloride.

33. The catalyst component for olefin polymerization according to claim 29, characterized in that, The molar ratio of the sum of the internal electron donor compound a and the internal electron donor compound b to the magnesium compound is 0.01-5.0, and the magnesium compound is calculated as magnesium element.

34. A catalyst for olefin polymerization, wherein the feedstock comprises the catalyst component as described in any one of claims 1-33 and an organoaluminum compound.

35. The catalyst according to claim 34, characterized in that, The general formula of the organoaluminum compound is AlR c p X (3-p) , where R c It is hydrogen or C1-C 20 The hydrocarbon group, X is a halogen, and p is an integer 0 ≤ p ≤ 3.

36. The catalyst according to claim 34, characterized in that, The organoaluminum compounds include at least one of trialkylaluminum compounds, alkylaluminum halides, alkylaluminum hydrides, alkylaluminum sesquichlorides, and alkylaluminoxanes.

37. The catalyst according to claim 34, characterized in that, The molar ratio of the organoaluminum compound to the titanium atoms in the catalyst component is 1-1000:

1.

38. The catalyst according to claim 34, characterized in that, The catalyst's raw material composition also includes an external electron donor; The external electron donor is a siloxane compound.

39. The catalyst according to claim 38, characterized in that, The general formula of the siloxane compound is R' t Si(OR'') 4-t Where R' and R'' are each independently selected from C1-C 18 The hydrocarbon group, t is an integer 0 ≤ t ≤ 3, and optionally, R' and R'' contain heteroatoms respectively.

40. The catalyst according to claim 39, characterized in that, The heteroatoms include at least one of N, O, S, P, and Si.

41. The catalyst according to claim 38, characterized in that, The molar ratio of silicon in the external electron donor to titanium in the catalyst component is 0.002-100.

42. The use of the catalyst according to any one of claims 34-41 in olefin polymerization.

43. The application according to claim 42, characterized in that, The olefins include at least one of ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 3-methyl-1-butene, 4-methyl-1-pentene, butadiene, vinylcyclopentene, and vinylcyclohexene. The polymerization includes homopolymerization or copolymerization; The polymerization temperature is ≤200℃; the polymerization pressure is ≤10MPa.

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