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Catalyst composition for long-chain α-olefin polymerization and method for catalyzing long-chain α-olefin polymerization

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization catalysts, can solve the problems of poor thermal stability and high molecular weight of catalytic long-chain alpha-olefins, and achieve the effects of high catalytic activity and quality improvement

Active Publication Date: 2020-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of catalyst that can catalyze long-chain α-olefins under relatively high temperature for the thermal stability of existing α-diimine nickel metal catalyst is not good, and the molecular weight of catalyzed long-chain α-olefin is relatively high. A catalyst composition for olefin chain polymerization and a method for catalyzing the polymerization of long-chain α-olefins; when the catalyst composition catalyzes α-olefin chain transfer polymerization, it has high catalytic activity and good thermal stability, and is used for synthesizing molecular weight. controlled polyalphaolefin

Method used

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  • Catalyst composition for long-chain α-olefin polymerization and method for catalyzing long-chain α-olefin polymerization
  • Catalyst composition for long-chain α-olefin polymerization and method for catalyzing long-chain α-olefin polymerization
  • Catalyst composition for long-chain α-olefin polymerization and method for catalyzing long-chain α-olefin polymerization

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Experimental program
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Effect test

Embodiment 1

[0043] Vacuumize the 100ml three-necked reaction flask, replace it with nitrogen three times, add 7.3mg (10μmol) complex 1, 15ml 1-decene, 0.8ml methylaluminoxane (MAO) (1.53mol / l toluene solution) , 0.5ml of diethylzinc (1.0mol / l toluene solution), the polymerization reaction stopped after 2 hours at 100°C, and the reaction system was black and viscous. Terminate the reaction with dilute hydrochloric acid-ethanol solution, dissolve the obtained polymer in tetrahydrofuran, precipitate in methanol, repeat this process three times, and finally put the sample in a vacuum drying oven for 24 hours to obtain 2.12 g of a white solid polymer with certain elasticity . The catalytic efficiency of the catalytic system is 212kg mol -1 Ni, the weight-average molecular weight of the polymer measured at the end of the reaction was Mw=283,200, and the molecular weight distribution Mw / Mn=2.21.

Embodiment 2

[0052] Vacuumize the 100ml three-necked reaction flask, replace it with nitrogen three times, add 7.3mg (10μmol) complex 1, 15ml 1-decene, 0.8ml methylaluminoxane (MAO) (1.53mol / l toluene solution) , 1.0ml of diethylzinc (1.0mol / l toluene solution), the polymerization reaction stopped after 2 hours at 100°C, and the reaction system was black and viscous. Terminate the reaction with dilute hydrochloric acid-ethanol solution, dissolve the obtained polymer in tetrahydrofuran, precipitate in methanol, repeat this process three times, and finally put the sample in a vacuum drying oven for 24 hours to obtain 1.64g of a white solid polymer with certain elasticity . The catalytic efficiency of the catalytic system is 164kg mol -1 Ni, the weight-average molecular weight of the polymer measured at the end of the reaction was Mw=152,400, and the molecular weight distribution Mw / Mn=1.88.

Embodiment 3

[0054] Vacuumize the 100ml three-necked reaction flask, replace it with nitrogen three times, add 7.3mg (10μmol) complex 1, 15ml 1-decene, 0.8ml methylaluminoxane (MAO) (1.53mol / l toluene solution) , 2.0ml of diethylzinc (1.0mol / l toluene solution), the polymerization reaction stopped after 2 hours at 100°C, and the reaction system was black and viscous. Terminate the reaction with dilute hydrochloric acid-ethanol solution, dissolve the obtained polymer in tetrahydrofuran, precipitate in methanol, repeat this process three times, and finally put the sample in a vacuum drying oven for 24 hours to obtain 1.12 g of a polymer with certain elasticity. The catalytic efficiency of the catalytic system is 112kg mol -1 Ni, the weight-average molecular weight of the polymer measured at the end of the reaction was Mw=82,700, and the molecular weight distribution Mw / Mn=2.06.

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Abstract

The invention provides catalyst composition for polymerization of long-chain alpha-olefin and a method for catalyzing polymerization of long-chain alpha-olefin by the catalyst composition. The catalyst composition comprises a main catalyst, an auxiliary catalyst and a chain transfer agent, wherein the main catalyst has the structure shown in the following description, wherein X denotes halogen, R<1>-R<5> are the same or different and independently selected from at least one of hydrogen, halogen, C1-C20 hydrocarbonyl and C4-C10 heterocyclic groups respectively; the auxiliary catalyst is selected from at least one of alkylaluminoxane, aryl boron and borate; the chain transfer agent is selected from trialkylaluminium and / or dialkylzinc. The method for catalyzing polymerization of long-chain alpha-olefin comprises steps as follows: long-chain alpha-olefin, the main catalyst, the auxiliary catalyst and the chain transfer agent make contact in the presence of inert gas for a polymerization reaction. The catalyst composition has higher catalytic activity and good thermal stability when catalyzing chain transfer polymerization of alpha-olefin and is used for synthesis of poly alpha-olefinwith controllable molecular weight.

Description

technical field [0001] The present invention relates to the technical field of catalysts for olefin polymerization, and more specifically, to a catalyst composition for chain transfer polymerization of long-chain α-olefins and a method for catalyzing the polymerization of long-chain α-olefins. Background technique [0002] Poly-α-olefin synthetic oil (PAO) is a high-purity oil produced by oligomerization and hydrogenation saturation of α-olefins under the action of a catalyst. Compared with mineral oil, PAO has the characteristics of high viscosity index, low pour point, high flash point and excellent high and low temperature performance, and it is still irreplaceable in many oil products. A significant issue in the preparation of α-olefin synthetic oils is to explore ways to control the viscosity index of polyα-olefins, that is, to control the molecular weight and distribution of polyα-olefins. [0003] Single-site polyolefin catalysts can well control the microstructure o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/14C08F110/14C08F4/70C08F2/38
CPCC08F10/14C08F110/14C08F4/7006C08F2/38C08F2500/03C08F2500/02
Inventor 高榕李岩赖菁菁刘东兵郭子芳周俊领傅捷
Owner CHINA PETROLEUM & CHEM CORP