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Catalyst component and catalyst for ethylene polymerization, process for preparing and use of the catalyst component

A technology for ethylene polymerization and catalysts, which is applied in the field of catalyst components and catalysts, and can solve the problems of difficult catalyst drying, unsatisfactory fluidity of catalyst powder, and high viscosity

Inactive Publication Date: 2003-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the introduction of α-branched long-carbon chain aliphatic alcohol compounds with higher viscosity, the viscosity of the reaction system is higher when the catalyst composition is prepared, which brings a lot of inconvenience to the preparation process. The addition of toluene-based high-boiling diluents in the catalyst brings difficulties to the drying of the catalyst, and the fluidity of the obtained catalyst powder is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: 1, the preparation of catalyst component:

[0027] (1) About 12 grams of spherical silica gel (model 948, Grace Company, USA) was weighed and activated at 600° C. for 4 hours under the protection of nitrogen.

[0028] (2) Under the protection of nitrogen, in the reaction flask after high-temperature drying with a stirrer, add 5.0 grams of thermally activated silica gel obtained in step (1), 100 milliliters of purified hexane and 5.0 milliliters of AlEtCl 2 hexane solution (2mmol / ml), react at 20-30°C for half an hour, then slowly add 2.2ml of Cl 2 CCH 2 OH, keep stirring for half an hour, heat up to 75°C, blow and dry with high-purity nitrogen to form a fluid solid powder.

[0029] (3) Add 100 ml of purified and dried hexane to the reactor again, and slowly add 10 ml of dibutylmagnesium in heptane solution (1M), stir and react at 50°C for 2 hours, then add 0.56 ml of TiCl dropwise 4 , and stirred for 1 hour at the same temperature.

[0030] (4) Raise t...

Embodiment 2

[0035] 1. Preparation of catalyst components: removal of Cl 2 CCH 2 Except that the consumption of OH is adjusted to 1.9ml, other conditions are the same as embodiment 1.

[0036] 2. The evaluation conditions for the slurry polymerization of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

[0037] The fluidity of the catalyst solid powder was measured by the method described, and the results are shown in Table 1.

Embodiment 3

[0039] 1. Preparation of catalyst components: remove AlEtCl 2 Adjusted to 4.5mlAlEt 2 Cl hexane solution (2.22mmol / ml), other conditions are the same as in Example 1.

[0040] 2. The evaluation conditions for the slurry polymerization of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

[0041] The fluidity of the catalyst solid powder was measured by the method described, and the results are shown in Table 1.

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Abstract

The catalyst components for polymerization of ethylene includes one kind of inorganic oxide carrier, at least one kind of carried alkyl metal halide, at least one kind of dialkyl magnesium compound, at least one kind of double-functional group compound capable of reacting with alkyl metal halide and at least one kind of titanium compound. The catalyst has high ethylene polymerizing activity and excellent hydrogen regulating performance, and during producing polyethylene with high melt index at high hydrogen pressure, the catalyst maintains high activity and has excellent granular form and flowability. The catalyst is especially suitable for ethylene polymerization with slurry feeding and gaseous polymerization.

Description

technical field [0001] The present invention relates to a catalyst component and its catalyst for the polymerization or copolymerization of olefins, especially ethylene, as well as the preparation method and application of the catalyst component. technical background [0002] Since the successful development of high-efficiency polyethylene catalysts in the 1970s, the world's polyethylene industry has undergone tremendous changes. Over the past 20 years, with the development of ethylene polymerization process, the catalysts matching the polymerization process have also made great progress. Among them, high-efficiency catalysts still occupy an important role in the field of polyethylene catalysts due to their excellent polymerization performance and mature application technology. status. After years of exploration and research, the preparation method of Mg-Ti high-efficiency catalyst has also developed from the co-grinding method and the suspension impregnation method to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/642C08F10/02
CPCY02P20/52
Inventor 高克京刘东兵赵勤芳张隽吕新平宁家成唐瑞国
Owner CHINA PETROLEUM & CHEM CORP