Solid catalyst for preparing olefin polymer and solid catalyst system

A technology of solid catalyst and olefin polymer, which is applied in the field of olefin polymerization, and can solve problems such as the need to improve the stereospecificity of the polymer, the low catalytic activity of the catalyst, and the narrow molecular weight distribution of the polymer.

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the catalytic activity of catalysts using dibasic aromatic carboxylic acid ester compounds is low, and the molecular weight distribution of the resulting polymer is relatively narrow; although the catalysts using 1,3-diether compounds have high activity and good hydrogen adjustment sensitivity, but The molecular weight distribution of the obtained polymer is narrow, which is not conducive to the development of different grades of polymers; the advantage of using succinate compounds as internal electron donors is that the molecular weight distribution of the synthesized polypropylene is wide, and the disadvantage lies in the stereospecification of the polymer sex needs to be improved

Method used

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  • Solid catalyst for preparing olefin polymer and solid catalyst system
  • Solid catalyst for preparing olefin polymer and solid catalyst system
  • Solid catalyst for preparing olefin polymer and solid catalyst system

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0177] This preparation example is used to illustrate the preparation of magnesium compounds.

[0178] Mix anhydrous magnesium chloride and ethanol according to the molar ratio of 1:2.6, heat up to 120°C to react to form a magnesium chloride alcoholate melt, stir at a high speed in the dispersion medium white oil and silicone oil, and then put it into cooled hexane to form The spherical magnesium chloride alcoholate particles are washed and dried to obtain a spherical carrier.

preparation example 2

[0180] This preparation example is used to illustrate the preparation of solid catalyst components.

[0181] In a 300mL stirred glass reaction bottle fully replaced by high-purity nitrogen, add 100mL of titanium tetrachloride, cool to -20°C, add 8g of the spherical magnesium chloride alcoholate prepared in Preparation Example 1, slowly heat up to 110°C, During the heating process, 0.3 mmol of compound B3 and 5 mmol of diisobutyl phthalate were added as internal electron donors, and after a constant temperature of 110 ° C for 0.5 h, the liquid was filtered off, treated twice with titanium tetrachloride, and then treated with After washing with hexane five times and vacuum drying, the titanium-containing solid catalyst component Z1 was obtained.

preparation example 3

[0183] The solid catalyst component Z2 was prepared in the manner of Preparation Example 2. The difference from Preparation Example 2 is only that Compound B3 in Preparation Example 2 is replaced by Compound L1.

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Abstract

The invention provides a solid catalyst for preparing an olefin polymer, the solid catalyst comprises the following components or reaction products of the following components: magnesium element, titanium element, halogen, a first internal electron donor and a second internal electron donor, the first internal electron donor comprises a pillararene compound as shown in formula (I), and the second internal electron donor is selected from one or more of an alcohol ester compound, an aromatic carboxylic ester compound, a diether compound and a succinate compound. By introducing the pillararene compound as shown in the formula (I) or the derivative thereof as an internal electron donor into the solid catalyst component, the stereospecificity of the catalyst can be improved, and the molecular weight of a polymerization product can be improved.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a solid catalyst and a solid catalyst system for preparing olefin polymers. Background technique [0002] As we all know, when the solid titanium-based catalyst component based on magnesium, titanium, halogen and internal electron donor compound is used for olefin polymerization, the internal electron donor compound has a great influence on important indicators such as polymerization activity, polymer isotactic index, molecular weight, etc. Playing a decisive role, the development of internal electron donor compounds has extraordinary significance for the replacement of catalysts. [0003] At present, domestic and foreign research on internal electron donors mainly focuses on fatty acid esters and aromatic ester compounds (such as patent CN85100997A and its derivative patents); diethers and diketones (such as patents CN1042547A and CN1054139A); succinic acid Esters (such as ...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646
CPCC08F10/00C08F110/06C08F4/6494C08F4/6465C08F2500/01C08F2500/15Y02P20/52
Inventor 林洁张晓帆黄庭付梅艳孙竹芳夏先知周俊领张军辉赵惠郭子芳严立安施展
Owner CHINA PETROLEUM & CHEM CORP
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