Catalyst component for ethene polymerization and catalyst

An ethylene polymerization and catalyst technology, which is applied in the field of catalyst components and catalysts, can solve the problem of insufficient catalyst activity, and achieve the effects of low oligomer content and low hexane extractives

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activity of the catalyst is not high enough

Method used

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  • Catalyst component for ethene polymerization and catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of catalyst

[0035] Add 1.5 grams of TiCl successively to a 250ml three-neck bottle that has been purged with nitrogen 4 , 4.4 grams of anhydrous MgCl 2 , 6.1 g of trichloroethanol and 100 ml of tetrahydrofuran, heated to 65° C. under stirring, and reacted at a constant temperature at this temperature for 3 hours. Cool down to 35°C.

[0036] Add 6 grams of silica gel (Cabot Corporation TS-610, particle size 0.02 to 0.1 micron) into a 250ml three-neck bottle that has been purged with nitrogen, add the mother liquor after cooling down, keep the temperature at 35°C, and stir for 1 hour. The blended mother liquor was spray-dried with a spray dryer under the spray conditions: inlet temperature 180°C, outlet temperature 110°C, to obtain a solid catalyst component, wherein the titanium content was 2.2wt%.

[0037] (2) Ethylene slurry polymerization

[0038] Add 1 liter of hexane into the 2 liter polymerization kettle that has been purged with nitrogen, add...

Embodiment 2

[0040] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of trichloroethanol was 12.2 g, and the titanium content of the resulting solid catalyst component was 2.2 wt%.

[0041] (2) Ethylene slurry polymerization is the same as in Example 1. The aggregation results are shown in Table 1.

Embodiment 3

[0043] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of trichloroethanol was 15.3 g, and the titanium content of the resulting solid catalyst component was 2.3 wt%.

[0044] (2) Ethylene slurry polymerization is the same as in Example 1. The aggregation results are shown in Table 1.

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Abstract

The invention relates to a catalyst component for ethene polymerization and a catalyst, and use of the catalyst. The catalyst component comprises a superfine inorganic oxide carrier, the carrier is loaded with a reaction product of a magnesium halide, a halogenated alcohol, at least a titanium halide and at least an electron donor compound, and the catalyst component is obtained by the reaction including the following steps: (1) mother liquor preparation, to be more specific, reacting the magnesium halide, the titanium halide and the halogenated alcohol with the general formula of XnROH in the electron donor compound to prepare mother liquor; (2) carrier mixing, to be more specific, mixing the mother liquor prepared by the step (1) with the superfine inorganic oxide carrier to obtain slurry; and (3) spray forming, to be more specific, performing spray drying on the slurry obtained by the step (2) to obtain the solid catalyst component. The prepared catalyst has high activity when the catalyst is used for ethylene homopolymerization or copolymerization of ethene and other alpha olefins, and the obtained polymers are low in hexane extract, and low in oligomer content.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization, its catalyst, and the use of the catalyst. Background technique [0002] In the polymerization of ethylene or the copolymerization of ethylene and α-olefin, the performance of the catalyst affects the performance of the polymer. When the catalyst catalyzes the polymerization of ethylene, some oligomers will be produced. The oligomers will change the stress between polyethylene molecules and affect the use performance and processing performance of the product. It will affect the yield strength, elongation and rigidity of the product. Both have an impact. The amount of oligomers is generally measured by the amount of hexane extract, therefore, the amount of hexane extract is also an important indicator to measure the catalyst performance. [0003] CN100368440 discloses a spray-dried polymerization catalyst and a polymerization method using the polymerization catalyst, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/02C08F4/649C08F4/646C08F4/654C08F4/651
Inventor 闫力欣周俊领张彤暄安京燕
Owner CHINA PETROLEUM & CHEM CORP
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