127results about How to "High stereospecificity" patented technology

The present invention provides a solid catalyst component for the polymerization of olefins, comprising magnesium, titanium, a halogen and an electron donor, wherein said electron donor comprises at least one selected from the group consisting of polyol ester compounds of the formula (I): R₁CO—O—CR₃R₄-A-CR₅R₆—O—CO—R₂ (I) wherein, R₁ and R₂ groups, which may be identical or different, can be substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R₃-R₆ groups, which may be identical or different, can be selected from the group consisting of hydrogen, halogen or substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R₁-R₆ groups optionally contain one or more hetero-atoms replacing carbon, hydrogen atom or the both, said hetero-atom is selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus and halogen atom, two or more of R₃-R₆ groups can be linked to form saturated or unsaturated monocyclic or polycyclic ring; A is a single bond or bivalent linking group with chain length between two free radicals being 1-10 atoms, wherein said bivalent linking group is selected from the group consisting of aliphatic, alicyclic and aromatic bivalent radicals, and can carry C₁-C₂₀ linear or branched substituents; one or more of carbon atom and/or hydrogen atom on above-mentioned bivalent linking group and substituents can be replaced by a hetero-atom selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus, and halogen atom, and two or more said substituents on the linking group as well as above-mentioned R₃-R₆ groups can be linked to form saturated or unsaturated monocyclic or polycyclic ring.

A catalyst used for olefin polymerizing reaction CH2=CHR, where R is hydrogen or C1-C6 alkyl or aryl, contains Mg, Ti, halogen and electron doner which may be at least one dialkoxide compound.

The invention relates to a preparation of olefin polymerization catalyst solid constituent, and comprises the steps: magniferous composition with general formula C l Mg (OR) . n (ROH) reacts with electron donor compound and tetrahalogen titanium respectively in the presence of unreactive hydrocarbons; solid is collected, washed and dried. R in the general formula is selected from C1-C5 alkyl while n is 0.1-1.0. The method has simple preparation; the produced catalyst solid constituent is used for propylene polymerization and has relatively high activity and tacticity.

The present invention provides one kind of catalyst for polymerization of olefin and the catalyst includes Mg, Ti, halogen and electron donor. The electron donor is at least one kind of dialcohol ester compound.

The present disclosure relates to the preparation of a cannabidiol compound or a derivative thereof. The cannabidiol compound or derivatives thereof can be prepared by an acid-catalyzed reaction of a suitably selected and substituted di-halo-olivetol or derivative thereof with a suitably selected and substituted cyclic alkene to produce a dihalo-cannabidiol compound or derivative thereof. The dihalo-cannabidiol compound or derivative thereof can be produced in high yield, high stereospecificity, or both. It can then be converted under reducing conditions to a cannabidiol compound or derivatives thereof.

The present invention relates to the field of olefin polymerization, and particularly provides a catalyst component for olefin polymerization, and a preparation method thereof, and a catalyst for olefin polymerization, and applications thereof. The catalyst component for olefin polymerization contains the product obtained by carrying out a reaction on a solid component, at least a titanium compound and an internal electron donor, wherein the internal electron donor contains a phosphate compound and a diether compound, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt% by using the total weight of the catalyst component as the reference, and the solid component contains a magnesium compound represented by a formula (1) and an alkylene oxide compound represented by a formula (2). According to the present invention, the catalyst component does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution. The formulas (1) and (2) are defined in the specification.

The invention provides a catalyst component for olefin polymerization and application of the catalyst component. The catalyst component contains a product obtained by reacting a magnesium halide adduct, a titanium compound and at least one optional internal electron donor compound, wherein the magnesium halide adduct is shown as MgX<1>Y-mEtOH-n(LB1)-k(LB2)-p(LB3). The invention also provides a catalyst system for olefin polymerization and application of the catalyst system. The catalyst system contains the catalyst component and one or more organic aluminum compounds. The invention also provides an olefin polymerization method. The method comprises the following step of: contacting one or more olefins and the catalyst system under the condition of olefin polymerization. The catalyst system has high hydrogen regulation sensitivity and stereospecificity in olefin polymerization, and good balance between the hydrogen regulation sensitivity and the stereospecificity of the catalyst system is achieved.

The present invention relates to the field of olefin polymerization, and particularly provides a catalyst component for olefin polymerization, and a preparation method thereof, and a catalyst for olefin polymerization, and applications thereof. The catalyst component for olefin polymerization contains the product obtained by carrying out a reaction on a magnesium source, a titanium source and an internal electron donor, wherein the internal electron donor contains a phosphate compound and a diether compound, and by using the total weight of the catalyst component as the reference, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt%. According to the present invention, the catalyst component does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution.

the invention provides a catalyst component for CH2ú¢CHR olefin polymerization reaction and its catalyst, wherein R is hydrogen or C1-C6 alkyl or aryl radical; such component comprising magnesium, titanium, halogen and electron donor, such electron donor is more than one kind diester of such formula (I), wherein Ríõ is the same with or different from R1, extracted from C1-C20 alkyl, cycloalkyl, aryl radical, alkylaryl, aralkyl, alkylene, condensed-nuclei aryl radical of substituted or unsubstituted straight/branched chain; such catalyst can be used for propylene polymerization, to get satisfied productivity, and high stereospecificity of polymers, with wide molecular weight distribution, which is good for developing polymers with different brands.

The invention discloses a Ziegler-Natta catalyst, which concretely comprises the following components of: (a) 10-25% of magnesium by weight, 1-10% of titanium by weight, 40-60% of halogen by weight and 1-30% of catalyst component of at least one maleic acid ester selected from the general formula (I) by weight; (b) alkyl aluminum compounds; and (c) optionally, an external electron donor. Because a maleic acid ester compound with a special structure is adopted to be the external electron donor, the catalyst with excellent combination property is obtained, when the catalyst is used for propylene copolymerization, satisfactory copolymerization yield can be obtained, and the polymer has higher stereospecificity.

The present invention relates to the field of olefin polymerization, particularly provides a catalyst for olefin polymerization, a preparation method and applications thereof. The catalyst for olefinpolymerization contains (i) a catalyst component, (ii) at least an alkyl aluminum compound and (iii) an external electron donor, wherein the catalyst component contains the product obtained by carrying out a reaction on a magnesium source, a titanium source and an internal electron donor, the internal electron donor contains a phosphate compound and a diether compound, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt% by using the total weight of the catalyst component as the reference, and the external electron donor has a structure represented by a formula (1). According to the present invention, the catalyst does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution. The formulas (1) is (R17)x(R18)ySi(OR19)z.

The invention provides a catalyst component for olefin polymerization, a preparation method of the catalyst component for the olefin polymerization, the catalyst component for the olefin polymerization prepared by using the method, a catalyst for the olefin polymerization and an application of the catalyst. The catalyst component comprises a product obtained by a reaction of a magnesium source, a titanium source and an internal electron donor, wherein the internal electron donor comprises carboxylic acid diol ester and phosphate. The stereo direction ability of the catalyst component for the olefin polymerization is relatively strong, and high-isotacticity polyolefin can be prepared by using the catalyst component.

The invention relates to a catalyst used for olefin polymerization and a preparation method thereof. The preparation method is as follows: in a reactor, under the protection of nitrogen, adding an organic solvent and a titanium compound, cooling to-30 to-10 DEG C, adding a carrier, maintaining at-30 to-10 DEG C, and stirring for 30-40min; slowly heating to 100 to 120 DEG C, in the heating process, adding an electron donor compound, reacting at 100-120 DEG C for 30-40min, filtering a liquid, again adding the titanium compound, heating to 110 to 130 DEG C, maintaining at 110 to 130 DEG C for 30-40min, filtering the liquid, washing an obtained solid, and drying under vacuum to obtain a target product. In a magnesium halide alcohol adduct formation process, a forming agent and a particle form control agent are added, the particle size distribution of the obtained carrier is more concentrated, the carrier is used for preparing the catalyst, activity and hydrogen sensitivity of the catalyst can be improved when the carrier is used for olefin polymerization especially for propylene polymerization, the bulk density of an obtained polymerization product is moderate, and the polymerization product is basically free of abnormity materials.

A magnesium halide adduct represented by the formula (I): MgX₂.mROH.nE.pH₂O, in which X is chlorine, bromine, a C₁-C₁₂ alkoxy, a C₃-C₁₀ cycloalkoxy or a C₆-C₁₀ aryloxy, with the proviso that at least one X is chlorine or bromine; R is a C₁-C₁₂ alkyl, a C₃-C₁₀ cycloalkyl or a C₆-C₁₀ aryl; E is an o-alkoxybenzoate compound represented by the formula (II): in which R₁ and R₂ groups are independently a C₁-C₁₂ linear or branched alkyl, a C₃-C₁₀ cycloalkyl, a C₆-C₁₀ aryl, a C₇-C₁₀ alkaryl or an C₇-C₁₀ aralkyl, the R₁ and R₂ groups are identical to or different from the R group; m is in a range of from 1.0 to 5.0; n is in a range of from 0.001 to 0.5; and p is in a range of from 0 to 0.8, is disclosed. A catalyst component useful in olefin polymerization, which comprises a reaction product of (1) the magnesium halide adduct, (2) a titanium compound, and optionally (3) an electron donor compound, is also disclosed.

The invention supplies a catalyst constituent used in alkene polyreaction. It includes magnesium, titanium, halogen and electron supplying identity. The electron supplying identity contains at least one of acetal or ketal compounds. When using in olefinic polymerization, the polymerizing yield could be satisfied. And the stereospecificity of the polymer is high.

A gamma-acyloxy substituted ether compound, its preparing process and its application in preparing the catalyst for polymerizing olefin are disclosed.

The invention relates to the field of olefin polymerization, and discloses an olefin polymerization catalyst carrier, a preparation method and applications thereof. The preparation method of the olefin polymerization catalyst carrier comprises the following steps: (1) mixing and emulsifying magnesium carboxylate, magnesium halide, an alcohol compound and an optional inert liquid medium to obtain an emulsified product; and (2) carrying out a contact reaction on the emulsified product and an ethylene oxide compound to obtain a solid-liquid mixture containing the olefin polymerization catalyst carrier. The carrier prepared by the method has good particle morphology, basically has no special-shaped particles, and can also improve the activity and the the stereotactic ability of the olefin polymerization catalyst in an olefin polymerization reaction, so that the olefin polymer has high bulk density.

The invention provides an olefin polymerization catalyst, as well as a combined catalyst containing the same and an application thereof. The olefin polymerization catalyst contains reaction products of the following raw materials: a composite carrier prepared by spray-drying magnesium halide and silicon dioxide, at least one compound selected from a group composed of dihydric alcohol sulphonate compounds, at least one compound selected from a group composed of a monohydric fatty group carboxylic ester compound, a dihydric fatty group carboxylic ester compound, a monohydric aromatic carboxylic ester compound, a dihydric aromatic carboxylic ester compound and a diether compound, and a titanium halide compound. The combined catalyst contains the olefin polymerization catalyst, an alkyl aluminium compound and the like. The olefin polymerization catalyst adopts two kinds of internal electron donor compounds, and can guarantee the stereoregularity of a prepared polymer while guaranteeing the catalyst activity.

The invention provides an unsaturated cyclosubstituted diacid ester compound and a preparation method thereof, and application of the unsaturated cyclosubstituted diacid ester compound in preparing an olefin polymerization catalyst component. When being used for preparing the Ziegler-Natta catalyst component as an electron donor, the compound can enable the catalyst component to have excellent activity and polymer products with high degree of isotacticity can be obtained.