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Catalyst components for olefinic polyreaction and catalyst thereof

An olefin polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of unsatisfactory widening of the molecular weight distribution of polymers and the like

Active Publication Date: 2007-11-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method has improved the catalyst to a certain extent, it is still unsatisfactory in terms of broadening the molecular weight distribution of the polymer.

Method used

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  • Catalyst components for olefinic polyreaction and catalyst thereof
  • Catalyst components for olefinic polyreaction and catalyst thereof
  • Catalyst components for olefinic polyreaction and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: the preparation of ethyl 3-benzoyloxybutyrate

[0067] 1) Preparation of ethyl 3-hydroxybutyrate

[0068] In a three-neck flask equipped with a titration device, add 1.5g of sodium borohydride, 0.02g of sodium hydroxide, and 13ml of water in sequence, and stir to mix evenly. In an ice-water bath, slowly add a mixture of 0.1 mol ethyl acetoacetate and 15 ml of anhydrous methanol dropwise to the reaction flask under stirring conditions. Continue to react for 2 hours after dropping. The solvent methanol and most of the water were evaporated to dryness using a rotary evaporator until the residue was a solid phase. Extract with anhydrous diethyl ether for 24hr under stirring condition. The extract was filtered and dried over anhydrous sodium sulfate. The solvent was evaporated to dryness to obtain 0.052 mol of the product ethyl 3-hydroxybutyrate. Yield 52%.

[0069] 2) Preparation of ethyl 3-benzoyloxybutyrate

[0070] Under anhydrous and oxygen-free nit...

Embodiment 2

[0078] Example 2 Preparation of ethyl 2-methyl-3-benzoyloxyvalerate

[0079] 1) Preparation of ethyl α-methylpropionoacetate

[0080] Under anhydrous and oxygen-free nitrogen protection conditions, add 0.15mol potassium tert-butoxide and 150ml tetrahydrofuran in sequence to a three-necked flask equipped with a titration device, and start stirring. Under the condition of ice-water bath, 0.12mol ethyl propionoacetate was slowly added dropwise. After the dropwise addition, the reaction was continued for 1 hr at room temperature. Slowly add 0.18mol iodomethane dropwise at room temperature, after the dropwise addition, continue to react at room temperature for 24 hours. After the reaction was completed, evaporate the solvent to dryness with a rotary evaporator, add saturated saline until the solid mixture was just completely dissolved, separate the organic phase, extract the aqueous phase with an appropriate amount of anhydrous ether three times, combine the organic phases, wash ...

Embodiment 3

[0093] Example 3 Preparation of 3-benzoyloxybutyric acid isobutyl ester

[0094] 1) Preparation of 3-hydroxybutyrate isobutyl

[0095] In a three-neck flask equipped with a titration device, add 1.5g of sodium borohydride, 0.02g of sodium hydroxide, and 13ml of water in sequence, and stir to mix evenly. In an ice-water bath, slowly add a mixture of 0.1 mol of isobutyl acetoacetate and 15 ml of anhydrous methanol dropwise into the reaction flask under stirring conditions. Continue to react for 2 hours after dropping. The solvent methanol and most of the water were evaporated to dryness using a rotary evaporator until the residue was a solid phase. Extract with anhydrous diethyl ether for 24hr under stirring condition. The extract was filtered, and the filtrate was dried over anhydrous sodium sulfate. The solvent was evaporated to dryness to obtain 0.052 mol of isobutyl 3-hydroxybutyrate. Yield 52%.

[0096] 2) Preparation of 3-benzoyloxybutyric acid isobutyl ester

[009...

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Abstract

The invention provides the catalyst constituents for olefin polymerization, which comprises Ti, Mg, halogens and at least two electron donor compounds a and b, wherein electron donor compound a is selected from diester compounds of formula (I), the electron donor compound b is selected from 1,3-diether compounds. The catalyst shows rather high catalytic activity and wide molecular weight distribution when being used for olefin polymerization, especially for propylene polymerization.

Description

technical field [0001] The present invention relates to a kind of catalyst component and catalyst for olefin polymerization, and it in alpha-olefin CH 2 = Use in polymerization of CHR and mixtures thereof, wherein R is hydrogen or an alkyl group of 1 to 12 carbon atoms. More particularly, it relates to a catalyst component and catalyst containing at least two electron donor compounds and their use. technical background [0002] It is well known that solid titanium catalyst components based on magnesium, titanium, halogen and electron donors can be used for CH 2 = CHR Olefin polymerization, especially in the polymerization of α-olefins with 3 or more carbon atoms, polymers with higher yield and higher stereoregularity can be obtained, wherein the electron donor compound is in the catalyst component One of the essential ingredients, and with the development of internal electron donor compounds, polyolefin catalysts are constantly updated. So far, many patents have disclosed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/643
Inventor 刘海涛高明智汤豪李季禹马晶李现忠王军丁春敏彭人琪
Owner CHINA PETROLEUM & CHEM CORP
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