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Solid catalyst component for ethylene polymerization and its preparation and application

A solid catalyst, ethylene polymerization technology, applied in the field of catalysts, can solve problems such as increasing the difficulty of catalyst promotion, and achieve the effects of low oligomer content and high bulk density

Active Publication Date: 2019-05-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Ucat-J catalyst adopts the form of slurry feeding, which is suitable for condensed state operation, but it needs to be equipped with a slurry feeding system on the production device, which increases the difficulty of popularizing this type of catalyst

Method used

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  • Solid catalyst component for ethylene polymerization and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of catalyst

[0034] Add 1.5g of TiCl successively to a 250ml three-necked bottle that has been purged with nitrogen 4 , 4.4g of anhydrous MgCl 2 , 6.1g of trichloroethanol, 100ml of tetrahydrofuran (100% analytically pure) and 10ml of 1mmol / ml methylcyclohexyldimethoxysilane were heated to 65°C under stirring, and reacted at a constant temperature for 3 hours at this temperature. Cool down to 35°C.

[0035] Add 6g of silica gel (Cabot Corporation TS-610, particle size 0.02-0.1μm) into a 250ml three-neck bottle that has been purged with nitrogen, add the cooled mother liquor, keep the temperature at 35°C, stir for 1 hour, then mix the silica gel The mixed mother liquor was spray-dried with a spray drier, spraying conditions: inlet temperature 180°C, outlet temperature 110°C, to obtain a solid catalyst, wherein the titanium content was 2.2wt%.

[0036] (2) Ethylene slurry polymerization

[0037] Add 1L of hexane to the 2L polymerization kettle that ha...

Embodiment 2

[0039] Same as Example 1, except that the amount of trichloroethanol is 12.2g, the titanium content in the obtained solid catalyst is 2.2wt%, and the polymerization results are shown in Table 1.

Embodiment 3

[0041]Same as Example 1, except that the amount of trichloroethanol is 15.3g, the titanium content in the obtained solid catalyst is 2.3wt%, and the polymerization results are shown in Table 1.

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Abstract

The invention relates to a solid catalyst component for a vinyl polymerization reaction. The preparation method comprises the following steps: the solid catalyst component comprises inorganic oxides as carriers, and reaction products from magnesium halide, titanium halide, halohydrin and silane compounds, which are loaded on inorganic oxides. The invention further relates to a preparation method of the solid catalyst component, and a catalyst used for the vinyl polymerization reaction. The solid catalyst component disclosed by the invention is high in polymerization activity when being used for the vinyl polymerization reaction, and the obtained polymer is high in bulk density and low in oligomer content.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for ethylene polymerization and a preparation method thereof. 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] The Ucat-J catalyst adopts the form of slurry feeding, which conforms to condensed state operation, but the prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/646C08F4/649C08F4/658C08F4/651C08F4/02
Inventor 安京燕闫力欣苗小培
Owner CHINA PETROLEUM & CHEM CORP