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Catalyst component and catalyst for olefin polymerization

A technology of olefin polymerization and catalyst, which is applied in the field of catalysts and can solve problems such as low melt index, low activity, and wide molecular weight distribution

Active Publication Date: 2019-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these compounds containing carbonate groups have certain deficiencies as internal electron donors, such as high raw material cost, not wide molecular weight distribution (CN102762603A, CN102712704A), low melt index (CN103764689A), or too low activity (WO2015185495A1, WO2015185489A1)

Method used

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  • Catalyst component and catalyst for olefin polymerization
  • Catalyst component and catalyst for olefin polymerization
  • Catalyst component and catalyst for olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] 1. Synthesis of internal electron donor compound (compound 1: 2-n-pentyl carbonate acetophenone)

[0089] 300g of 2-hydroxyacetophenone, 226.3g of anhydrous pyridine, and 10g of 4-dimethylaminopyridine were added to a mixed solvent of 300mL of dry tetrahydrofuran and 200mL of chloroform. 397.6g of n-pentyl chloroformate was added to 200mL of chloroform, and then added dropwise into the reaction system, and the temperature was kept stable between 10-20°C during the dropwise addition. After the dropwise addition, the temperature was raised to 50°C and stirred for 3-4 hours, and then reacted at 80°C for 8-10 hours. End the reaction, cool, filter to remove solid salt, spin dry the solvent, add 200mL ethyl acetate, 400mL water, use 10% hydrochloric acid to adjust to pH=5-6, separate liquid, ethyl acetate extract the aqueous phase twice (100mL, 80 mL), the organic phases were combined, dried over anhydrous magnesium sulfate, filtered, and the solvent was spin-dried to obtain...

Embodiment 2

[0097] 1. Synthesis of internal electron donor compound (compound 2: 2-n-butyl carbonate acetophenone)

[0098] Using a synthesis method similar to compound 1, n-pentyl chloroformate was replaced by n-butyl chloroformate to prepare 383.5 g of 2-n-butyl carbonate acetophenone with a yield of 73.6% and a purity of 98.81% (GC).

[0099] 1 H NMR (CDCl 3 / TMS,300MHz)δ(ppm):0.94-0.99(t,-O(CH 2 ) 3 CH 3 ),1.42-1.50(m,-OCH 2 CH 2 CH 2 CH 3 ),1.72-1.77(m,-OCH 2 CH 2 CH 2 CH 3 ),2.56(s,-C(O)CH 3 ),4.26-4.30(m,-OCH 2 CH 2 CH 2 CH 3 ),7.19-7.53(m,-C 6 h 4 ).

[0100] Two, the preparation method of catalyst component is with embodiment 1, and difference is, in step (2), compound 1 is replaced by compound 2 (the mol ratio of compound 2 and magnesium compound is 0.088 with compound 2: magnesium), Catalyst component 2 was obtained.

[0101] 3. The method for propylene polymerization is the same as in Example 1, except that catalyst component 1 is replaced by catalyst comp...

Embodiment 3

[0103] 1. Synthesis of internal electron donor compound (compound 3: 2-isobutyl carbonate acetophenone)

[0104] Using a synthesis method similar to compound 1, n-pentyl chloroformate was replaced by isobutyl chloroformate to prepare 282.6 g of 2-isobutyl carbonate acetophenone with a yield of 55.6% and a purity of 98.7% (GC).

[0105] 1 H NMR (CDCl 3 / TMS,300MHz)δ(ppm):0.98-1.00(t,-OCH 2 CH(CH 3 ) 2 ),(m,-OCH 2 CH(CH 3 ) 2 ),2.53(s,-C(O)CH 3 ),4.04-4.06(d,-OCH 2 CH(CH 3 ) 2 ),7.17-7.80(m,-C 6 h 4 ).

[0106] Two, the preparation method of catalyst component is the same as embodiment 1, and difference is that compound 1 is replaced by compound 3 (the molar ratio of compound 3 and magnesium compound is calculated as 0.088 with compound 3:magnesium), obtains catalyst component 3.

[0107] 3. The method of propylene polymerization is the same as in Example 1, except that the catalyst component 1 is replaced by the catalyst component 3, and the polymerization results...

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Abstract

The present invention relates to a catalyst component for olefin polymerization, and a catalyst thereof, wherein the catalyst component comprises magnesium, titanium, a halogen and an internal electron donor compound, and the internal electron donor compound comprises at least a 2-carbonate phenyl ketone compound represented by a general formula (I). According to the present invention, the catalyst has advantages of good hydrogen regulation performance, high polymerization activity, good stereospecificity and the like; with the application of the catalyst in olefin polymerization reactions, the obtained polymer has advantages of good isotacticity, high melting index, wide molecular weight distribution and high bulk density; and the novel catalyst of the present invention has characteristics of excellent comprehensive performance and broad application prospects. The formulas I and II are defined in the specification.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst component for olefin polymerization and a catalyst thereof. Background technique [0002] A solid titanium catalyst component based on magnesium, titanium, halogen and an electron donor, known in the art as a Ziegler-Natta catalyst, can be used for the polymerization of CH2=CHR olefins, especially those with 3 carbons or more Polymers with higher yield and higher stereoregularity can be obtained in the polymerization of α-olefins with carbon atoms. Among them, the internal electron donor compound is one of the essential components in the Ziegler-Natta catalyst components. Starting from the second generation of Z-N catalysts, the development of each generation of catalysts is marked by the successful application of new internal electron donors, from monocarboxylic acid ester compounds, such as ethyl benzoate, to the widely used binary aromatic Carboxylat...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/649
CPCC08F4/6494C08F10/00C08F110/06
Inventor 张锐谭忠周奇龙徐秀东尹珊珊李凤奎于金华宋维玮
Owner CHINA PETROLEUM & CHEM CORP