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Catalyst components for olefinic polyreaction and catalyst thereof

A technology for olefin polymerization and catalyst, applied in the field of catalyst components and catalysts for olefin polymerization

Active Publication Date: 2005-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned disclosed catalysts still have some unsatisfactory defects in the practical application of olefin polymerization. As an electron donor, a catalyst with excellent comprehensive performance can be obtained. When used in the polymerization of propylene, a satisfactory polymerization yield can be obtained, and the stereospecificity of the polymer is high, and the molecular weight distribution of the obtained polymer is wide. At the same time The catalyst has good sensitivity to hydrogen adjustment, which is very beneficial to the development of different brands of resins

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

[0063] Embodiment 1: Preparation of ethyl 2-benzyl-3-benzoyloxybutyrate

[0064] (1) Preparation of ethyl 2-benzyl acetoacetate

[0065] 0.1mol ethyl acetoacetate, 0.1mol K 2 CO 3 ., 0.1 mol benzyl bromide, 0.01 mmol PEG-400 (polyethylene glycol 400) and 100 ml benzene were stirred at 75° C. for 7 hours. .Add 20ml NH after cooling 4 Dissolve in a saturated Cl solution and extract with ethyl acetate. Remove the solvent, distill under reduced pressure, and collect the fraction 116-118°C / 20Pa. The yield was 74%.

[0066] (2) Preparation of ethyl 2-benzyl-3-hydroxybutyrate

[0067] 0.05mol NaBH 4 25ml of water was added to 0.4g of NaOH, cooled in an ice bath, a mixture of 0.07mol ethyl 2-benzyl acetoacetate and 30ml of methanol was added dropwise with stirring, and stirred at room temperature for 5 hours. Remove solvent, extract with ethyl acetate, anhydrous Na 2 SO 4 After drying, the solvent was removed to obtain 0.06mol of a colorless liquid. Yield 85%.

[0068] (3)...

Embodiment 2

[0078] Embodiment 2: the preparation of ethyl 3-benzoyloxybutyrate

[0079] 1) Preparation of ethyl 3-hydroxybutyrate

[0080]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 ethyl acetate 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 dried over anhydrous sodium sulfate. The solvent was evaporated to dryness to obtain 0.052 mol of the product ethyl 3-hydroxybutyrate. Yield 52%.

[0081] 2) Preparation of ethyl 3-benzoyloxybutyrate

[0082] Under anhydrous and oxygen-free nitr...

Embodiment 3

[0090] Embodiment 3: Preparation of ethyl 2-methyl-3-benzoyloxybutyrate

[0091] 1) Preparation of ethyl α-methyl acetoacetate

[0092] 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 acetoacetate 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 f...

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Abstract

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.

Description

technical field [0001] The invention relates to a solid catalyst component containing a diester compound of a special structure, a catalyst containing the solid catalyst component and the catalyst in CH 2 = Application in CHR olefin polymerization, where R is hydrogen or C 1 -C 6 The alkyl or aryl group, especially in the application of propylene polymerization, can obtain polymers with higher yield, higher isotacticity and wider molecular weight distribution. 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 cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00
Inventor 高明智刘海涛李天益李昌秀邢凌燕李季禹丁春敏马晶李现忠王晓东
Owner CHINA PETROLEUM & CHEM CORP
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