Catalyst component and catalyst for olefin polymerization, and preparation methods thereof

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

Inactive Publication Date: 2017-03-29
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 and catalyst for olefin polymerization, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of catalyst

[0052] Add 1.5 grams of TiCl to a 250ml three-necked flask that has been blown by nitrogen. 4 , 4.4 grams of anhydrous MgCl 2 , 0.51ml of dichloromethane and 100ml of tetrahydrofuran, heated to 650C with stirring, and reacted at this temperature for 3 hours at a constant temperature. Cool down to 35°C.

[0053] Add 6 grams of silica gel (Cabot Corporation TS-610, particle size of 0.02 to 0.1 micron) into a 250m1 three-necked flask that has been blown by nitrogen. Add the cooled mother liquor, keep the temperature at 35°C, and stir for 1 hour. The mixed mother liquor is spray-dried with a spray dryer, and the spray conditions are: an inlet temperature of 180°C and an outlet temperature of 110°C to obtain a solid catalyst component, wherein the titanium content is 2.17wt%.

[0054] (2) Ethylene slurry polymerization

[0055] Add 1 liter of hexane into a 2 liter polymerizer that has been blown by nitrogen, and at the same time add 1 ml of 1 mmol of t...

Embodiment 2

[0057] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of methylene chloride is 0.26 ml, and the titanium content of the obtained solid catalyst component is 2.29 wt%.

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

Embodiment 3

[0060] (1) The preparation of the catalyst is the same as in Example 1. Only the amount of methylene chloride was 1.03 ml, and the titanium content of the obtained solid catalyst component was 2.3 wt%.

[0061] (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 and catalyst for olefin polymerization, and preparation methods thereof. The catalyst component comprises 1) an ultrafine inorganic oxide carrier and 2) a reaction product of magnesium halide, halogenated hydrocarbon, titanium halide and an electron donor compound. The catalyst comprises a reaction product of the following components: (A) the catalyst component provided by the invention, and (B) an organo-aluminum compound with a general formula of AlR<n>X<3-n>, wherein in the formula, R is an alkyl group with a hydrogen or carbon atom number of 1 to 20, X is halogen, preferably chlorine, bromine or iodine, and n is more than 0 and no more than 3. The catalyst has high activity; and a polymer prepared by using the catalyst has higher bulk density and a higher melt index.

Description

Technical field [0001] The invention belongs to the field of catalysts, and specifically 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 are produced. The oligomers change the force between the polyethylene molecules, which affects the use performance and processing performance of the product, and it affects the yield strength, elongation and rigidity of the product. All have an impact. The amount of oligomer is generally measured by the amount of hexane extract. Therefore, the amount of hexane extract is also an important indicator of catalyst performance. [0003] CN100368440 discloses a spray-dried polymerization catalyst and a polymerization method using the polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/654C08F4/651C08F4/642C08F4/02C08F10/02
Inventor 寇鹏周俊领李秉毅黄庭马永华
Owner CHINA PETROLEUM & CHEM CORP
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