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Olefin polymerizing catalyst, preparation and use thereof

A technology of olefin polymerization and catalyst, which is applied in the field of improved supported chromium-based catalysts, which can solve the problems of temperature sensitivity and low catalytic efficiency, and achieve the effects of good polymer shape, high bulk density and improved efficiency

Active Publication Date: 2009-01-14
ZIBO XINSU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Disadvantages of chromium-based catalysts compared to other olefin polymerization catalysts are their low catalytic efficiency and sensitivity to temperature

Method used

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  • Olefin polymerizing catalyst, preparation and use thereof
  • Olefin polymerizing catalyst, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Composite carrier A described in the present invention was prepared.

[0029] Mix 200g AlCl with stirring 3 ·6H 2 O was dissolved in 1000mL deionized water, and 1900g SiO was added 2 The carrier is impregnated at 30-50°C for 2 hours, heated up to 100°C to evaporate free water in the system, and fully dried to obtain SiO with good flow. 2 / AlCl 3 Composite carrier, under nitrogen protection, activated the obtained composite carrier in a muffle furnace for 12 hours at 600°C, took it out and cooled it to normal temperature under nitrogen protection, and obtained composite catalyst carrier A.

Embodiment 2

[0031] Composite carrier B of the present invention was prepared.

[0032] 400g AlCl 3 ·6H 2 O was dissolved in 1000mL deionized water, and 1800g SiO was added 2 The carrier is impregnated at 30-50°C for 2 hours, heated up to 100°C to evaporate free water in the system, and fully dried to obtain SiO with good flow. 2 / AlCl 3 Composite carrier, under the protection of nitrogen, activated the obtained composite carrier in a muffle furnace for 12 hours at 600°C, took it out and cooled it to normal temperature under the protection of nitrogen, and obtained the composite catalyst carrier B.

Embodiment 3

[0034] Prepare composite carrier C according to the present invention.

[0035] 400g of anhydrous AlCl 3 Dissolve in 1000mL deionized water, add 1600g SiO 2 The carrier is impregnated at 30-50°C for 2 hours, heated up to 100°C to evaporate free water in the system, and fully dried to obtain SiO with good flow. 2 / AlCl 3 Composite carrier, under nitrogen protection, activated the obtained composite carrier in a muffle furnace for 12 hours at 600° C., took it out and cooled it to normal temperature under nitrogen protection, and obtained composite catalyst carrier C.

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Abstract

The invention relates to an improved olefin polymerization catalyst and the preparation method as well as the application, which comprises a carrier and organoaluminium compound reducing agent loaded on the carrier and double triphenyl silane chromate active ingredient. The invention is characterized in that the carrier is a compound carrier adopting SiO2 and AlCl3 as materials, and the mass ratio of SiO2 and AlCl3 in the carrier is 1 to 20:1. By adopting the SiO2 / AlCl3 compound carrier prepared through the invention, the efficiency of chromium in the catalyst can be effectively improved, thus the ethylene polymerization activity of the catalyst is enhanced, and the hydrogen sensibility and the copolymerization performance of the catalyst are adjusted; the modality of the obtained polymeric compound is good and the bulk density is high, therefore the prepared polyvinyl resin can be used to produce high performance tubular products and coating materials, and the like.

Description

technical field [0001] The present invention is an improved chromate olefin polymerization catalyst and its preparation method and application, specifically, it is an improved supported chromium-based catalyst, and the catalyst prepared by the improved loading process has higher ethylene polymerization activity, Sensitive to hydrogen adjustment, good copolymerization performance; the obtained polymer has good shape and high bulk density. The prepared polyethylene resin can be used to produce high-performance polyethylene pipe material or film material. Background technique [0002] Supported chromium-based catalysts are one of the most widely used catalytic systems in the field of olefin polymerization, and bistriphenylsilane chromate active components have also been used as ethylene polymerization catalysts for many years, described in US Patents 3,642,749 and 3,704,287 Catalyst supported on SiO with chromate or bis-three-substituent polyester ring catalyst 2 And the chro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/69C08F4/02C08F10/00C08F210/16
Inventor 张志传李德宏苏光宗德斌刘洋赵晓燕衣斌
Owner ZIBO XINSU CHEM
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