Catalyst component used in ethylene polymerization reaction, catalyst and preparation method thereof

An ethylene polymerization and catalyst technology, applied in the field of catalyst components, can solve the problems of complex preparation process, easily broken catalyst, and many fine polymer powders, etc.

Active Publication Date: 2015-10-14
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 component used in ethylene polymerization reaction, catalyst and preparation method thereof
  • Catalyst component used in ethylene polymerization reaction, catalyst and preparation method thereof
  • Catalyst component used in ethylene polymerization reaction, catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 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 12ml of TiCl dropwise 4 , heat up to 50°C, stir for 1 hour, then cool down to 30°C, add 3.6g of 1,8-octanedithiol, 1.95g of epoxy compound (e) and 0.4ml of epichlorohydrin in sequence, and maintain the reaction 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 chromatography funnel throug...

Embodiment 2

[0044] (1) Preparation of catalyst components

[0045] 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 cooling down to -10°C, adding 6ml of TiCl dropwise 4 , heat up to 50°C, stir for 1 hour, cool down to 25°C, then add 4.7g of 1,6-hexanedithiol, 2.6g of epoxy compound (e) and 0.6ml of epichlorohydrin in sequence, and maintain the reaction 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 tra...

Embodiment 3

[0049] (1) Preparation of catalyst components

[0050] 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 lowering the temperature to 0°C, adding 60ml TiCl dropwise 4 , raised the temperature to 60°C, stirred for 1.5 hours, then cooled down to 30°C, added 36g of α,ω-18 carbon mercaptan, 21g of epoxy compound (d) and 1.6ml of epichlorohydrin in sequence, and maintained the reaction for 3 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...

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Abstract

The invention discloses a catalyst component used in an ethylene polymerization reaction, a preparation method and a catalyst thereof, wherein the catalyst component includes: (1) a magnesium alcohol adduct; (2) a titanium compound; (3) a mercaptan compound; (4) a double-epoxy group compound and (5) a single-epoxy group compound. The catalyst has a polymerization activity being suitable for a gas-phase polymerization process of ethylene. An obtained polymer is high in stacking density and is low in fine powder content.

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 Applications(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/643C08F4/646C08F4/52
Inventor 李秉毅赵梅君周俊领黄庭姚青杨岭寇鹏马永华
Owner CHINA PETROLEUM & CHEM CORP
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