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Catalyst components and catalysts for ethylene polymerization

A technology for ethylene polymerization and catalysts, which is applied in the field of catalyst components, and can solve the problems of many polymer fine powders, complicated preparation process, and easily broken catalysts.

Active Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1400979A discloses a catalyst component for the preparation of ethylene (co)polymers, the catalyst component can produce polymers with high bulk density, can avoid the problem of fine powder formation and has high activity, the catalyst component contains Non-stereospecific solid catalyst component, which contains titanium compound and magnesium dihalide, it is with α-olefin CH 2 =CHR I Prepolymerized, wherein R is a C1-C8 alkyl group, the degree of prepolymerization is such that for every gram of the solid catalyst component, the amount of α-olefin prepolymer is at most 100 grams, but the preparation process of this method is complicated
CN101137677A discloses a catalyst component for ethylene polymerization, the catalyst component comprises Ti, Mg, halogen and 1,2-dimethoxyethane as an internal electron donor compound, the catalyst is suitable for ethylene (co- ) polymerization process to produce (co)polymers with narrow molecular weight distribution (MWD) and high bulk density, but this method still does not solve the problem that the catalyst is easily broken and the polymer fine powder is more in the gas phase polymerization process

Method used

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  • Catalyst components and catalysts for ethylene polymerization
  • Catalyst components and catalysts for ethylene polymerization
  • Catalyst components and catalysts for ethylene polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of catalyst components

[0036] In the reactor fully replaced by high-purity nitrogen, add 6.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, cyclohexane 150ml, stirring and lowering the temperature to 0°C, adding 6ml of HDI dropwise, stirring for 1 hour, and then adding 2ml of TiCl dropwise 4 and 8ml of benzenesulfonyl chloride, the temperature was raised to 50°C, and the reaction was maintained for 2 hours. Stop stirring and let it stand, the suspension will be separated quickly, the supernatant liquid will be sucked off, and the precipitate will be washed twice with cyclohexane at room temperature. Add 150ml of hexane, cool the system to 0°C, slowly add 4ml of titanium tetrachloride dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed twice with hexane, it will be transferred to a chroma...

Embodiment 2

[0042] (1) Preparation of catalyst components

[0043] In the reactor fully replaced by high-purity nitrogen, add 6.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, cyclohexane 150ml, stirring and lowering the temperature to -10°C, adding 6ml of HMDI dropwise, stirring for 1 hour, and then adding 2ml of TiCl dropwise 4 and 8ml of benzenesulfonyl chloride, the temperature was raised to 50°C, and the reaction was maintained for 2 hours. Stop stirring and let it stand, the suspension will be separated quickly, the supernatant liquid will be sucked off, and the precipitate will be washed twice with cyclohexane at room temperature. Add 150ml of cyclohexane, cool the system to 0°C, slowly add 4ml of titanium tetrachloride dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed twice with hexane, it will be transferred to ...

Embodiment 3

[0047] (1) Preparation of catalyst components

[0048] In the reactor fully replaced by high-purity nitrogen, add 36.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, cyclohexane 750ml, stirring and cooling down to 0°C, adding 36ml of HDI dropwise, stirring for 1 hour, and then adding 15ml of TiCl dropwise 4 and 45ml of benzenesulfonyl chloride, the temperature was raised to 50°C, and the reaction was maintained for 2 hours. Stop stirring and let it stand, the suspension will be separated quickly, the supernatant liquid will be sucked off, and the precipitate will be washed twice with cyclohexane at room temperature. Add 750ml of hexane, cool the system to 0°C, slowly add 24ml of titanium tetrachloride dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed twice with hexane, it will be transferred to a chromatograph...

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PUM

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Abstract

The invention relates to a catalyst ingredient used for ethylene polymerization, and a catalyst of the catalyst ingredient. The catalyst ingredient comprises following ingredients: (1) a magnesium alcohol adduct, (2) a titanium compound, (3) an isocyanate compound, and (4) a compound containing sulfuryl; the magnesium alcohol adduct is a chloride magnesium alcohol adduct with a general formula of MgCl<2>-mR<1>OH, wherein R<1> is used for representing alkyl with 1 to 4 carbon atoms, and m is used for representing a number ranging from 2.0 to 4.0; general formula of the titanium compound is Ti(OR<2>)<n>X<4-n>, wherein R<2> is used for representing alkyl with 1 to 8 carbon atoms, X is used for representing a halogen atom, and 0<=n<=4; general formula of the isocyanate compound is OCNR<3>NCO, wherein R<3> is used for representing aliphatic hydrocarbon or aryl with 5 to 23 carbon atoms. The catalyst possesses polymerization activity suitable for ethylene gas phase polymerization; and bulk density of obtained polymers is high, and fine powder content is relatively low.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization or copolymerization, a preparation method of the catalyst component and a catalyst thereof. More specifically, it relates to a catalyst component into which highly active end groups are introduced during the preparation process, a method for preparing the catalyst component, and a catalyst thereof. Background technique [0002] The Ziegler-Natta type ethylene polymerization spherical catalyst prepared by magnesium chloride ethanol carrier has been extensively studied, and the catalyst is widely used in ethylene (co)polymerization devices operating in liquid phase or in gas phase. However, the use of the catalyst component itself is not entirely satisfactory. In fact, the polymerization reaction is very exothermic due to the high reactivity of ethylene. Consequently, the catalyst is subjected to very strong tensions in the initial stages of polymerization, which lead to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/645C08F4/654C08F4/651
Inventor 李秉毅周俊领马永华杨岭寇鹏黄庭
Owner CHINA PETROLEUM & CHEM CORP