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Olefin polymerization catalyst component, olefin polymerization catalyst and application

A technology for olefin polymerization and catalysts, which is applied in olefin polymerization catalyst components and olefin polymerization catalysts and application fields, can solve the problems of poor copolymerization performance and low activity, and achieve the effects of improving copolymerization performance, increasing polymerization activity, and reducing costs

Active Publication Date: 2021-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of poor copolymerization performance and relatively low activity in the olefin polymerization process in the prior art, the present invention provides an olefin polymerization catalyst component, an olefin polymerization catalyst and its application in olefin polymerization

Method used

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  • Olefin polymerization catalyst component, olefin polymerization catalyst and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The preparation of the catalyst component was carried out in an inert gas-protected glove box at room temperature, and 20 μmol of dibenzylidene (cyclopentadienyl) (9-fluorenyl) zirconium dichloride powder was weighed and placed in a glass bottle , 0.3 mL of a hexane solution of triisobutylaluminum with a concentration of 0.4 mol / L was added dropwise, and then 11 mL of toluene was added, and stirred for about 5 min to obtain an orange-red catalyst component solution.

[0053] The reactor is a 500mL reactor with a stirrer. Before the reaction, carry out conventional dehydration and deoxidation treatment, and pass through polymer grade ethylene for replacement 3 times. First add 300mL of refined hexane to the reaction kettle, then add 8mL of a hexane solution of triisobutylaluminum with a concentration of 0.4mol / L, 11mL of refined hexene, 8mL of the above-mentioned catalyst component solution, and 8mL of a concentration of 2mmol / L toluene solution of trityl tetrakis (pen...

Embodiment 2

[0055] Weigh 23 μmol of dibenzylidene (cyclopentadienyl) (9-fluorenyl) zirconium dichloride powder and place it in a glass bottle, add 12 mL of toluene, and then dropwise add 2.3 mL of Tris The hexane solution of isobutylaluminum was stirred for about 5 minutes to obtain an orange-red catalyst component solution.

[0056] Other polymerization conditions were the same as in Example 1, 8.5 mL of the catalyst solution was added, the reactor temperature was 80° C., and the reaction time was 10 min. Obtained polymer 11.7g, melt flow rate is 127g / 10min, density is 0.881g / cm 3 , the hexene content is 25%, and the polymerization activity is 5.14×10 5 g·g -1 (Zr) h -1 .

Embodiment 3

[0058] Other conditions are the same as in Example 2, except that the catalyst component solution is 6.2 mL during olefin polymerization, and the hexane solution of triisobutylaluminum and the toluene solution of trityl tetrakis (pentafluorophenyl) borate are added in different amounts. is 5mL. The reaction time was 18min, and 8.7g of polymer was obtained, the melt flow rate was 0.7g / 10min, and the density was 0.9g / cm 3 , the hexene content is 14%, and the polymerization activity is 3.19×10 5 g·g -1 (Zr) h -1 .

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Abstract

The invention discloses a catalyst component which is a pre-complexation product of a metallocene catalyst precursor with an organic aluminum compound in a solvent. The invention also provides an olefin polymerization catalyst. The olefin polymerization catalyst comprises a main catalyst and a cocatalyst. The main catalyst is the catalyst component, and the cocatalyst comprises an organic aluminum compound and an organic boron compound. The metallocene catalyst precursor and the organic aluminum compound are subjected to pre-complexing treatment to obtain the main catalyst, and the catalytic activity and copolymerization performance are obviously improved compared with the catalytic effect obtained by directly adding the metallocene catalyst in the prior art.

Description

technical field [0001] The invention belongs to the field of olefin coordination polymerization, and relates to an olefin polymerization catalyst component, an olefin polymerization catalyst and an application. Background technique [0002] Ethylene / α-olefin copolymer with high comonomer insertion content—polyolefin elastomer (POE) is an industrial product with high added value. Because of its good chemical resistance, good weather resistance, light weight and continuous production, it is widely used in the fields of automobiles, electronics, electrical and daily necessities. In POE production, major companies use metallocene catalyst systems. [0003] Since Professor Kaminsky formally proposed the metallocene catalyst system in the early 1980s, a typical catalyst system is generally composed of two parts, that is, a variety of metallocene compounds located in the IVB group transition metals of the element cycle such as zirconium, hafnium, titanium, etc. main catalyst, and...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F210/16C08F210/14C08F4/6592C08F2/06
CPCC08F10/00C08F210/16C08F210/14C08F4/65927C08F2500/12C08F2500/08C08F2/06
Inventor 金钊韩书亮李昊坤宋文波王路生方园园
Owner CHINA PETROLEUM & CHEM CORP
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