Catalyst composition containing organic boron compound and application thereof

Abstract

The invention provides a catalyst composition containing an organic boron compound. The catalyst composition comprises a non-metallocene catalyst and the organic boron compound. Compared with an existing organic boron catalyst, the organic boron compound in the catalyst composition has the advantage that the solubility of the organic boron compound in alkane is remarkably improved, so that the catalytic activity of the non-metallocene catalyst in the composition can be remarkably improved. And the polymer obtained by catalysis has high molecular weight. In addition, the obtained polymer has proper molecular weight distribution and melting temperature, and has certain commercial application.

Description

Technical Field

[0001] This invention belongs to the field of polyolefin catalyst technology, specifically relating to a catalyst composition containing an organoboron compound and its uses. Background Technology

[0002] Polyolefins have become the most popular resin materials due to their abundant raw materials, low price, ease of production and processing, and superior performance. With the improvement of living standards and new demands in some specialized fields, the demand for high-performance polyolefins produced by homogeneous catalysts such as metallocene polyolefins and solution-process polyolefins is increasing. However, the production cost of these high-performance polyolefins is relatively high, mainly because it requires the addition of large amounts of expensive MAO or MMAO, thus increasing costs. Furthermore, the large addition of MAO or MMAO introduces a significant amount of ash into the polyolefin, limiting its applications. Therefore, developing effective co-catalysts with low addition amounts is key to promoting the development of high-performance polyolefin production using metallocene polyolefins and homogeneous catalysts in solution-process polyolefins.

[0003] Organoboron additives have addressed this issue to some extent, but most patent reports indicate that organoborons have low solubility in alkanes, easily introducing other polar solvents during polymerization and increasing separation costs. Furthermore, these patents primarily focus on optimizing the synthetic route of a single organoboron agent, with few reports on the development of new, highly efficient organoborons. In addition, while existing boron agents have some industrial applications as co-catalysts for olefin polymerization alongside the main catalyst, their tendency to form relatively stable ion pairs with the main catalyst limits the coordination of olefins at the active site of the main catalyst, thus restricting further improvements in catalytic activity and efficiency, and consequently limiting the plant's capacity in actual production. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a catalyst composition containing an organoboron compound, comprising: a non-metallocene catalyst and at least one organoboron compound selected from formulas A, B, or C:

[0005]

[0006] in, This indicates whether the bond is a single or double bond.

[0007] R 11 R 12 R 15 and R 18 They are either the same or different, and are independently selected from H and C. 1-16 Alkyl or C 2-16 alkenyl;

[0008] R 13 R 14 R 16 and R 17 They are either the same or different, and are independently selected from H, halogens, and C. 1-18 Alkyl or C 2-18 alkenyl;

[0009] m is 1, 2, or 3;

[0010] n is 1, 2, 3 or 4;

[0011] s is 1 or 2;

[0012] X - It is a tetra(pentafluorophenyl)borate anion.

[0013] According to an embodiment of the present invention, R 11 R 12 R 15 and R 18 They are either the same or different, and are independently selected from H and C. 1-8 Alkyl or C 2-8 alkenyl;

[0014] R 13 R 14 R 16 and R 17 They are either the same or different, and are independently selected from H, halogens, and C. 1-12 Alkyl or C 2-12 alkenyl;

[0015] m is 1, 2, or 3;

[0016] n is 1, 2, 3 or 4;

[0017] s is 1 or 2.

[0018] According to an embodiment of the present invention, the organoboron compound of formula A is selected from the following structures:

[0019]

[0020] Among them, X - It is a tetra(pentafluorophenyl)borate anion.

[0021] According to an embodiment of the present invention, the organoboron compound represented by formula B is selected from the following structures:

[0022]

[0023] Among them, X - It is a tetra(pentafluorophenyl)borate anion.

[0024] According to an embodiment of the present invention, the organoboron compound represented by formula C is selected from the following structures:

[0025]

[0026] Among them, X - It is a tetra(pentafluorophenyl)borate anion.

[0027] According to an embodiment of the present invention, the non-metallocene catalyst is selected from complexes represented by Formula I:

[0028]

[0029] Among them, R 1 Selected from any of the following groups: C 3-10 cycloalkyl, C 3-10 Alkyloxy, C 3-10 Cycloalkylamino, C 6-14 Aryl, C 6-14 aryloxy group, C 6-14 Arylamino, dicyclohexylmethyl, dibenzocycloheptanyl, anthraceneyl, dicyclohexanophenyl;

[0030] R 2 Selected from hydrogen, halogens, or any of the following groups: C 1-6 Alkyl, C 1-6 Alkoxy, C 3-10 cycloalkyl, C 3-10 Cycloalkyloxy, C 6-14 Aryl, C 6-14 aryloxy group;

[0031] T 1 and T 2 All are 1,2-ethylene, 1,3-propadiyl, 1,4-butadiyl, and 2,4-pentadiyl;

[0032] X is a halogen, methyl, benzyl, or dimethylamino; M is selected from group IVB metals.

[0033] According to an embodiment of the present invention, the non-metallocene catalyst is selected from the following complexes:

[0034]

[0035] M1: M = Ti, X = Cl;

[0036] M2: M = Zr, X = Me;

[0037] M3 = Hf, X = Bn.

[0038] According to an embodiment of the present invention, in the catalyst composition, the molar ratio of metal M in the non-metallocene catalyst to boron atoms in the organoboron compound is 1:0.1-200, for example 1:0.5-100, such as 1:1-50.

[0039] According to an embodiment of the present invention, the catalyst composition further includes an organometallic aluminum compound selected from at least one of the following compounds: methylaluminoxane, tetraisobutylaluminoxane, trimethylaluminum, triethylaluminum, and triisobutylaluminum.

[0040] According to an embodiment of the present invention, when the catalyst composition further includes an organometallic aluminum compound, the molar ratio of metal M in the non-metallocene catalyst, boron atoms in the organoboron compound, and aluminum atoms in the organometallic aluminum compound is 1:0.1-200:1-1000, for example, 1:0.5-100-500, or 1:1-50:10-200.

[0041] In some embodiments of the invention, the catalyst composition comprises at least one of organoboron compounds A1-A4, at least one of non-metallocene catalysts M1-M3, and optionally an organometallic aluminum compound.

[0042] In some embodiments of the present invention, the catalyst composition comprises: organoboron compound A3, non-metallocene catalyst M1, and MAO.

[0043] The present invention also provides the use of the catalyst composition described above for catalyzing the homopolymerization of ethylene or the copolymerization of it with α-olefins.

[0044] According to embodiments of the present invention, the α-olefin is selected from at least one of the following: propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-eicosene, 3-butadiene, 1,4-pentadiene, and 2-methyl-1,3-butadiene.

[0045] The present invention also provides a method for catalyzing the homopolymerization of ethylene or the copolymerization of ethylene with α-olefins using the catalyst composition described above, comprising the steps of: polymerizing ethylene or a mixture of ethylene and α-olefins in the presence of the catalyst composition.

[0046] According to an embodiment of the invention, the pressure of the polymerization reaction is from 1 atm to 200 atm, preferably from 5 atm to 150 atm.

[0047] According to an embodiment of the invention, the polymerization reaction is carried out at a temperature of 50°C to 200°C, for example, 80°C to 150°C.

[0048] Beneficial effects

[0049] This invention combines an organoboron compound containing an N-heterocyclic ring with a non-metallocene catalyst for catalytic homopolymerization of ethylene or copolymerization with α-olefins. The organoboron compound in the catalyst composition of this invention significantly improves the solubility of the catalytically sourced organoboron catalyst in alkanes compared to existing organoboron catalysts, thus significantly improving the catalytic activity of the non-metallocene catalyst in the composition. The resulting polymer has a high molecular weight. Furthermore, the resulting polymer exhibits a suitable molecular weight distribution and melting temperature, indicating potential commercial applications.

[0050] Furthermore, the preparation method of the organoboron compound in the catalyst composition of this application is simple, therefore, the composition has certain industrial application prospects.

[0051] Terminology Definitions and Explanations

[0052] Unless otherwise defined, all technical terms herein have the same meaning as commonly understood by one of ordinary skill in the art to which the subject matter of the claims pertains.

[0053] Term "C" 1-18 "Alkyl" should be understood to refer to a straight-chain or branched saturated monovalent hydrocarbon group having 1 to 18 carbon atoms. The term "C"... 1-16 "alkyl" should be understood to refer to a straight-chain or branched saturated monovalent hydrocarbon group having 1 to 16 carbon atoms, preferably "C". 1-12 "alkyl" or "C" 1-8 Alkyl group. "C" 1-8 "Alkyl" means a straight-chain or branched alkyl group having 1, 2, 3, 4, 5, 6, 7, or 8 carbon atoms. The alkyl group is, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, sec-butyl, isopentyl, 2-methylbutyl, 1-methylbutyl, 1-ethylpropyl, 1,2-dimethylpropyl, neopentyl, 1,1-dimethylpropyl, 4-methylpentyl, 3-methylpentyl, 2-methylpentyl, 1-methylpentyl, 2-ethylbutyl, 1-ethylbutyl, 3,3-dimethylbutyl, 2,2-dimethylbutyl, 1,1-dimethylbutyl, 2,3-dimethylbutyl, 1,3-dimethylbutyl, or 1,2-dimethylbutyl, or their isomers.

[0054] Term "C" 3-10"Cycloalkyl" should be understood as representing a saturated monovalent monocyclic, bicyclic, or polycyclic hydrocarbon ring (also called a fused ring hydrocarbon ring) with 3-1 carbon atoms. Bicyclic or polycyclic cycloalkyl includes fused cycloalkyl, bridged cycloalkyl, and spirocyclic cycloalkyl; fused ring refers to a fused ring structure formed by two or more cyclic structures sharing two adjacent ring atoms (i.e., sharing a bond). Bridged ring refers to a fused ring structure formed by two or more cyclic structures sharing two non-adjacent ring atoms. Spirocyclic refers to a fused ring structure formed by two or more cyclic structures sharing a single ring atom. For example, the C 3-1 Cycloalkyl groups can be C 3-8 Monocyclic cycloalkyl groups, such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, or C 7-12 Circoalkyl, such as decahydronaphthalene ring; or C 7-12 Bridged cycloalkyl groups, such as norbornene, adamantane, and bicyclo[2,2,2]octane.

[0055] Term "C" 2-18 "Alkenyl" should be understood to preferably represent a straight-chain or branched monovalent hydrocarbon group containing one or more double bonds and having 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, or 18 carbon atoms, preferably "C". 2-8 "Alkenyl". It should be understood that, in the C 2-8 When the alkenyl group contains more than one double bond, the double bonds can be separable or conjugated. The C 2-10Alkenyl groups are, for example, vinyl, allyl, (E)-2-methylvinyl, (Z)-2-methylvinyl, (E)-but-2-enyl, (Z)-but-2-enyl, (E)-but-1-enyl, (Z)-but-1-enyl, pent-4-enyl, (E)-pent-3-enyl, (Z)-pent-3-enyl, (E)-pent-2-enyl, (Z)-pent-2-enyl, (E)-pent- 1-Alkenyl, (Z)-pent-1-alkenyl, hex-5-alkenyl, (E)-hex-4-alkenyl, (Z)-hex-4-alkenyl, (E)-hex-3-alkenyl, (Z)-hex-3-alkenyl, (E)-hex-2-alkenyl, (Z)-hex-2-alkenyl, (E)-hex-1-alkenyl, (Z)-hex-1-alkenyl, isopropenyl, 2-methylprop-2-alkenyl, 1-methylprop-2-alkenyl 2-Methylprop-1-enyl, (E)-1-methylprop-1-enyl, (Z)-1-methylprop-1-enyl, 3-methylbut-3-enyl, 2-methylbut-3-enyl, 1-methylbut-3-enyl, 3-methylbut-2-enyl, (E)-2-methylbut-2-enyl, (Z)-2-methylbut-2-enyl, (E)-1-methylbut-2-enyl, (Z)-1-methyl But-2-enyl, (E)-3-methylbut-1-enyl, (Z)-3-methylbut-1-enyl, (E)-2-methylbut-1-enyl, (Z)-2-methylbut-1-enyl, (E)-1-methylbut-1-enyl, (Z)-1-methylbut-1-enyl, 1,1-dimethylprop-2-enyl, 1-ethylprop-1-enyl, 1-propylvinyl, 1-isopropylvinyl.

[0056] Term "C" 6-14 "Aryl" should be understood as representing a monovalent aromatic or partially aromatic monocyclic, bicyclic, or tricyclic hydrocarbon ring ("C") having 6, 7, 8, 9, 10, 11, 12, 13, or 14 carbon atoms. 6-14 Aryl), particularly a ring with 6 carbon atoms (“C6 aryl”), such as phenyl; or biphenyl, or a ring with 9 carbon atoms (“C9 aryl”), such as indenyl or indenyl, or a ring with 10 carbon atoms (“C9 aryl”). 10 Aryl groups, such as tetrahydronaphthyl, dihydronaphthyl, or naphthyl, or rings with 13 carbon atoms (“C”). 13 Aryl groups, such as fluorene groups, or rings with 14 carbon atoms (“C”). 14 Aryl), for example, anthracene. When the C 6-20 When the aryl group is substituted, it can be monosubstituted or polysubstituted. Furthermore, there are no restrictions on the substitution site; for example, it can be ortho, para, or meta substituted.

[0057] Similarly, C 6-14 Aryl, C 3-10The cycloalkyl group has the same definition throughout the text. Detailed Implementation

[0058] The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0059] Unless otherwise stated, the raw materials and reagents used in the following examples are commercially available products or can be prepared by known methods.

[0060] The non-metallocene catalysts M1, M2 and M3 used in the following examples were prepared according to the method described in Patent Document 202010793023.8, specifically according to the method described in Examples 3-5 of that patent.

[0061] The polymerization activity was calculated using the following formula: Polymer activity = polymer mass / (metal content in catalyst * polymerization time).

[0062] In the examples below, the molecular weight of the polymer was tested using an Alliance GPC V2000 GPC analyzer.

[0063] In the examples below, the melt index of the polymer is based on ASTM D1238-13, using conditions of 190°C / 5.0 kg.

[0064] In the examples below, the comonomer insertion rate was determined according to the method described in reference (Macromolecules 1999, 32, 3817) by high temperature. 13 The 13C NMR was performed; high-temperature 13C NMR was obtained using deuterated 1,1,2,2-tetrachloroethane as solvent at 120°C with a Bruker DMX 300MHz instrument.

[0065] Preparation Example 1: Preparation of organoboron compound A1

[0066]

[0067] Organoboron compound A1 was prepared by ion exchange of 1-allyl-3-vinylimidazolium bromide with potassium tetra(pentafluorophenyl)borate.

[0068] The MRI confirmation data is shown below:

[0069] 1 H NMR (300MHz, DMSO-d6) δ8.92(d,1H),7.92-7.75(d,2H),6.07(s,1H),5.45-5.10(d,7H).

[0070] Preparation Example 2: Preparation of organoboron compound A2

[0071]

[0072] Organoboron compound A2 was prepared by ion exchange of 1-allyl-3-butylimidazolium bromide with potassium tetra(pentafluorophenyl)borate.

[0073] The MRI confirmation data is shown below:

[0074] 1 H NMR (300MHz, DMSO-d6) δ8.93(d,1H),7.95-7.74(d,2H),6.11(s,1H),5.45-5.01(d,6H),2.01(d,2H),1.31(t,2H),0.89(s,3H).

[0075] Preparation Example 3: Preparation of organoboron compound A3

[0076]

[0077] Organoboron compound A3 was prepared by ion exchange of 1-allyl-3-hexylimidazolium bromide with potassium tetra(pentafluorophenyl)borate.

[0078] The MRI confirmation data is shown below:

[0079] 1 H NMR (300MHz, DMSO-d6) δ8.90(d,1H),7.98-7.64(d,2H),6.05(s,1H),5.55-5.21(d,6H),2.06(d,2H),1.31-1.20(t,6H),0.86(s,3H).

[0080] Preparation Example 4: Preparation of organoboron compound A4

[0081]

[0082] Organoboron compound A4 was prepared by ion exchange of 1-allyl-3-octylimidazolium bromide with potassium tetra(pentafluorophenyl)borate.

[0083] The MRI confirmation data is shown below:

[0084] 1H NMR (300MHz, DMSO-d6) δ8.93(d,1H),7.91-7.61(d,2H),6.02(s,1H),5.65-5.19(d,6H),2.03(d,2H),1.29-1.22(t,10H),0.87(s,3H).

[0085] Example 1

[0086] The homopolymerization of ethylene was catalyzed using the organoboron compound obtained in the above preparation example, MAO as a co-catalyst, and a non-metallocene catalyst as the main catalyst. The specific reaction steps are as follows:

[0087] A 1L high-pressure reactor containing an ampoule of non-metallocene catalyst M1 (1 μmol), a temperature sensor, a reflux cooling device, and a mechanical stirrer was continuously dried at 100°C for 1.5 hours, then evacuated and gradually cooled to room temperature. 500 mL of Isopar E, 1 mL of an organoboron compound A1 (2 mmol / L) in Isopar E solution, and 0.2 mL of mol / L MAO (1 mol / L) in diluted Isopar E solution (Al / M / B = 100 / 1 / 0.5) were added sequentially. The temperature was then raised to 130°C, and ethylene monomer was introduced to initiate the polymerization reaction (29.6 atm). The reaction conditions remained constant throughout the polymerization process. After 15 min of reaction, the gas in the reactor was vented, the reaction solution was neutralized with anhydrous ethanol (5%) containing concentrated hydrochloric acid, the resulting polymer was collected by filtration, washed with anhydrous ethanol, and vacuum dried to constant weight.

[0088] Example 2

[0089] The procedure is the same as in Example 1, except that the reaction temperature is 150°C.

[0090] Example 3

[0091] The procedure is the same as in Example 1, except that the reaction temperature is 170°C.

[0092] Example 4

[0093] The procedure is the same as in Example 1, except that the catalyst is M2.

[0094] Example 5

[0095] The procedure is the same as in Example 1, except that the catalyst is M3.

[0096] Example 6

[0097] The operation is the same as in Example 2, except that the amount of catalyst and co-catalyst is Al / M / B = 100 / 1 / 1.

[0098] Example 7

[0099] The procedure is the same as in Example 6, except that the organoboron compound is A2.

[0100] Example 8

[0101] The procedure is the same as in Example 6, except that the organoboron compound is A3.

[0102] Example 9

[0103] The procedure is the same as in Example 6, except that the organoboron compound is A4.

[0104] The specific catalytic structures are shown in Table 1 below:

[0105] Table 1. Results of homopolymerization catalysis

[0106]

[0107] Example 10

[0108] The homopolymerization of ethylene was catalyzed using the organoboron compound and MAO obtained in the above preparation example as co-catalysts and a non-metallocene catalyst as the main catalyst. The specific reaction steps are as follows:

[0109] A 1L high-pressure reactor containing an ampoule of non-metallocene catalyst M1 (1 μmol), a temperature sensor, a reflux evaporation device, and a mechanical stirrer was continuously dried at 100°C for 1.5 hours, then evacuated and gradually cooled to room temperature. 500 mL of Isopar E, 1 mL of an organoboron compound A1 (2 mmol / L) in Isopar E solution, 0.2 mL of mol / L MAO (1 mol / L) in diluted Isopar E solution (Al / M / B = 100 / 1 / 1), and 100 mL of 1-hexene were added sequentially. The temperature was then raised to 150°C, and ethylene monomer was introduced to initiate the polymerization reaction (29.6 atm). The reaction conditions remained constant throughout the polymerization process. After 15 min of reaction, the gas in the reactor was vented, the reaction solution was neutralized with anhydrous ethanol (5%) containing concentrated hydrochloric acid, the resulting polymer was collected by filtration, washed with anhydrous ethanol, and vacuum dried to constant weight.

[0110] Example 11

[0111] The procedure is the same as in Example 10, except that the catalyst is M2.

[0112] Example 12

[0113] The procedure is the same as in Example 10, except that the catalyst is M3.

[0114] Example 13

[0115] The procedure is the same as in Example 10, except that the co-catalyst is A2.

[0116] Example 14

[0117] The procedure is the same as in Example 10, except that the co-catalyst is A3.

[0118] Example 15

[0119] The procedure is the same as in Example 10, except that the co-catalyst is A4.

[0120] The catalytic results are shown below:

[0121] Table 2 Results of Copolymerization Catalysis

[0122]

[0123] The results above show that the organoboron compounds in the catalyst composition of the present invention improve the solubility of saturated alkanes compared to existing organoboron catalysts, thus significantly improving the catalytic activity of the non-metallocene catalyst in the composition. The catalyst composition containing the organoboron compounds can catalyze the homopolymerization and copolymerization of ethylene with high activity, producing products with high molecular weights. Furthermore, the polymer obtained by the present invention has a suitable molecular weight distribution and melting temperature, and has certain commercial applications.

[0124] The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A catalyst composition containing an organoboron compound, characterized in that, include: The non-metallocene catalyst and at least one of the organoboron compounds represented by formula A, B or C: in, This indicates whether the bond is a single or double bond. R 11 R 12 R 15 and R 18 They are either the same or different, and are independently selected from H and C. 1-16 Alkyl or C 2-16 alkenyl; R 13 R 14 R 16 and R 17 They are either the same or different, and are independently selected from H, halogens, and C. 1-18 Alkyl or C 2-18 alkenyl; m is 1, 2, or 3; n is 1, 2, 3 or 4; s is 1 or 2; X - It is a tetra(pentafluorophenyl)borate anion; The non-metallocene catalyst is selected from the complex shown in Formula I: Among them, R 1 Selected from any of the following groups: C 3-10 cycloalkyl, C 3-10 Alkyloxy, C 3-10 Cycloalkylamino, C 6-14 Aryl, C 6-14 aryloxy group, C 6-14 Arylamino, dicyclohexylmethyl, dibenzocycloheptanyl, anthraceneyl, dicyclohexanophenyl; R 2 Selected from hydrogen, halogens, or any of the following groups: C 1-6 Alkyl, C 1-6 Alkoxy, C 3-10 cycloalkyl, C 3-10 Cycloalkyloxy, C 6-14 Aryl, C 6-14 aryloxy group; T 1 and T 2 All are 1,2-ethylene, 1,3-propadiyl, 1,4-butadiyl, and 2,4-pentadiyl; X is a halogen, methyl, benzyl, or dimethylamino; M is selected from group IVB metals.

2. The catalyst composition according to claim 1, characterized in that, R 11 R 12 R 15 and R 18 They are either the same or different, and are independently selected from H and C. 1-8 Alkyl or C 2-8 alkenyl; R 13 R 14 R 16 and R 17 They are either the same or different, and are independently selected from H, halogens, and C. 1-12 Alkyl or C 2-12 alkenyl; m is 1, 2, or 3; n is 1, 2, 3 or 4; s is 1 or 2.

3. The catalyst composition according to claim 1 or 2, characterized in that, The organoboron compound of formula A is selected from the following structures: Among them, X - It is a tetra(pentafluorophenyl)borate anion; Preferably, the organoboron compound shown in Formula B is selected from the following structures: Among them, X - It is a tetra(pentafluorophenyl)borate anion; Preferably, the organoboron compound represented by formula C is selected from the following structures: Among them, X - It is a tetra(pentafluorophenyl)borate anion.

4. The catalyst composition according to any one of claims 1-3, characterized in that, The non-metallocene catalyst is selected from the following complexes: M1: M = Ti, X = Cl; M2: M = Zr, X = Me; M3 = Hf, X = Bn.

5. The catalyst composition according to any one of claims 1-4, characterized in that, In the catalyst composition, the molar ratio of metal M in the non-metallocene catalyst to boron atoms in the organoboron compound is 1:0.1-200; Preferably, the catalyst composition further includes an organometallic aluminum compound selected from at least one of the following compounds: methylaluminoxane, tetraisobutylaluminoxane, trimethylaluminum, triethylaluminum, and triisobutylaluminum. Preferably, when the catalyst composition further includes an organometallic aluminum compound, the molar ratio of metal M in the non-metallocene catalyst, boron atoms in the organoboron compound, and aluminum atoms in the organometallic aluminum compound is 1:0.1-200:1-1000.

6. The catalyst composition according to any one of claims 1-5, characterized in that, The catalyst composition comprises: at least one of organoboron compounds A1-A4, at least one of non-metallocene catalysts M1-M3, and optionally an organometallic aluminum compound; Preferably, the catalyst composition comprises: an organoboron compound A3, at least one of non-metallocene catalysts M1-M3, and MAO.

7. Use of the catalyst composition according to any one of claims 1-5 for catalyzing the homopolymerization of ethylene or the copolymerization of it with α-olefins.

8. The use according to claim 7, characterized in that, The α-olefin is selected from at least one of the following: propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-eicosene, 3-butadiene, 1,4-pentadiene, and 2-methyl-1,3-butadiene.

9. A method for catalyzing the homopolymerization of ethylene or copolymerization with α-olefins using the catalyst composition according to any one of claims 1-5, characterized in that, The process includes the following steps: polymerizing ethylene or a mixture thereof with α-olefins in the presence of the catalyst composition.

10. The method according to claim 9, characterized in that, The polymerization reaction is carried out at a pressure of 1 atm to 200 atm. Preferably, the polymerization reaction is carried out at a temperature of 50°C to 200°C.

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