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Catalyst component for olefin polymerization, catalyst and preparation method thereof

An olefin polymerization and catalyst technology, applied in the field of catalysts, can solve the problem of insufficient catalyst activity, and achieve the effects of low oligomer content, high melt index, and low hexane extractives

Active Publication Date: 2021-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity of the catalyst is not high enough

Method used

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  • Catalyst component for olefin polymerization, catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of catalyst

[0049] Add 1.5 grams of TiCl successively to a 250ml three-neck bottle that has been purged with nitrogen 4 , 4.4 g anhydrous MgCl 2 , 1.28ml of phenyl silicon trichloride and 100ml of tetrahydrofuran, heated to 65 ° C under stirring, at this temperature constant temperature reaction for 3 hours. Cool down to 35°C.

[0050] 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 cooled mother liquor, keep the temperature at 35°C, and stir for 1 hour. The blended mother liquor was spray-dried with a spray drier under spray conditions: inlet temperature 180°C, outlet temperature 110°C to obtain a solid catalyst component, wherein the titanium content was 1.91wt%.

[0051] (2) Ethylene slurry polymerization

[0052] Add 1 liter of hexane into the 2 liter polymerization kettle that has been purged with nitrogen, add 1 milliliter of 1 mm...

Embodiment 2

[0054] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of phenyl silicon trichloride was 0.64 ml, and the titanium content of the resulting solid catalyst component was 2.12 wt%.

[0055] (2) Ethylene slurry polymerization is the same as in Example 1, and the polymerization results are shown in Table 1.

Embodiment 3

[0057] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of phenyl silicon trichloride was 2.56 ml, and the titanium content of the resulting solid catalyst component was 2.24 wt%.

[0058] (2) Ethylene slurry polymerization is the same as in Example 1, and the polymerization results are shown in Table 1.

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Abstract

The invention relates to a catalyst component for olefin polymerization, a catalyst and a preparation method thereof. The catalyst component comprises: 1) an ultrafine inorganic oxide support, and 2) a reaction product of a magnesium halide, a halosilane, a titanium halide, and an electron donor compound. The catalyst comprises the reaction product of: (A) a catalyst component described in the present invention; and (B) the general formula AlR' n x 3‑n An organoaluminum compound, wherein R' is hydrogen or a hydrocarbon group with 1-20 carbon atoms, X is a halogen, preferably chlorine, bromine, iodine, and an organoaluminum compound of 0<n≤3. The catalyst of the present invention is highly active, and the resulting polymer has a high melt index and low hexane extractables.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a catalyst component for olefin polymerization, a catalyst 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] CN100368440 discloses a spray-dried polymerization catalyst and a polymerization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/02
Inventor 寇鹏周俊领李秉毅黄庭马永华
Owner CHINA PETROLEUM & CHEM CORP