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Diester-maleate-containing solid catalyst component for olefin polymerization and preparation method thereof

A technology of maleic acid diester and solid component is applied in the field of olefin polymerization catalyst solid component and its preparation, and can solve the problem of low isotacticity of polypropylene.

Active Publication Date: 2011-10-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the development of electron-donating components that do not contain aromatic rings, JP4-80044B and JP8-157521A disclose a malonate compound; JP2-61483B discloses a 1,2-cyclohexanedicarboxylate compound, however When these catalysts are used for propylene polymerization, the isotacticity of polypropylene is not high

Method used

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  • Diester-maleate-containing solid catalyst component for olefin polymerization and preparation method thereof
  • Diester-maleate-containing solid catalyst component for olefin polymerization and preparation method thereof
  • Diester-maleate-containing solid catalyst component for olefin polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Add 5g of anhydrous magnesium chloride, 23mL of isooctyl alcohol, 1mL of 2,3-diisobutyl di-n-butyl maleate, tetrabutyl titanate and 30mL of dry decane compound into the reaction flask, titanium The molar weights of tetrabutyl maleate and di-n-butyl 2,3-diisobutylmaleate are equal, and react at 130°C for 4 hours under the protection of nitrogen to fully dissolve anhydrous magnesium chloride to obtain a stable and uniform alcoholate solution, the reaction system was slowly lowered to room temperature.

[0054] (2) Add the homogeneous solution prepared above dropwise to a reactor fully replaced by nitrogen and equipped with 200ml titanium tetrachloride at -20°C within 1 hour. 1ml of 2,3-diisobutyldi-n-butylmaleate, continue to heat up for 30min until the temperature reaches 110°C, add 1.5ml of 2,3-diisobutyldi-n-butylmaleate, and react at this temperature 2 hours. After the reaction was completed, the liquid was filtered out, and 200 ml of titanium tetrachloride was ...

Embodiment 2

[0061] 2,3-diisobutyl di-n-butyl maleate is replaced by 2,3-diisobutyl diisobutyl maleate, and others are the same as in Example 1. Catalyst composition analysis results:

[0062] Titanium content: 2.17% (wt)

[0063] Magnesium content: 16.5% (wt)

[0064] Ester content: 8.1% (wt)

[0065] Polymerization result: catalytic activity 56,600gPP / gCat, polymer apparent density 0.46g / cm 3 , The isotacticity is 98.5%.

Embodiment 3

[0067] 2,3-diisobutyl di-n-butyl maleate is replaced with 2,3-diisopropyl di-n-butyl maleate, and others are the same as in Example 1. Catalyst composition analysis results:

[0068] Titanium content: 2.16% (wt)

[0069] Magnesium content: 16.5% (wt)

[0070] Ester content: 8.3% (wt)

[0071] Polymerization result: catalytic activity 55,400gPP / gCat, polymer apparent density 0.46g / cm 3 , The isotacticity is 98.3%.

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Abstract

The invention discloses a diester-maleate-containing solid catalyst component for olefin polymerization. The component comprises (1) magnesium halide, (2) a titanium active component, and (3) a diester maleate compound shown as the following formula, wherein R1 to R4 in the formula 1 can be the same or different and are selected from C1 to C8 alkyls and C1 to C8 cycloalkyls, preferentially C1 to C6 alkyls. The magnesium halide alcohol compound and the titanium compound are contacted and reacted; the diester maleate compound is added into the reaction product; and after filtering and washing, the solid catalyst component can be prepared. The solid catalyst component is combined with aluminum alkyl and a silane compound to form a catalyst, which can be applied to olefin polymerization.

Description

technical field [0001] The invention relates to a solid component of an olefin polymerization catalyst and a preparation method thereof, in particular to a catalyst solid component containing a maleic acid diester and a preparation method thereof. Background technique [0002] Since the advent of Ziegler-Natta catalysts, the preparation methods and related technologies for olefin polymerization catalysts have made great progress. Some olefin polymerization catalysts have been successfully industrialized and applied to various polymerization processes. Most of the Ziegler-Natta catalyst components used in conventional polymerization contact magnesium compounds, titanium compounds, halides and electron donors to form olefin polymerization catalysts. Usually, the electron donor added in the catalyst preparation process is a diester compound, such as Chinese patents CN85100997A and CN 1172966C. In the case of special requirements for the product, it is also necessary to add an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649
Inventor 李化毅胡友良
Owner INST OF CHEM CHINESE ACAD OF SCI
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