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Catalyst components for olefin polymerization and their preparation and application

An olefin polymerization and catalyst technology, applied in the field of catalyst components and their preparation, can solve the problems of difficult control, complicated forming steps, high material prices and the like

Active Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the forming steps of these methods are complicated and difficult to control, and the shape of the obtained catalyst particles is also difficult to control, and the materials used are expensive and difficult to obtain.

Method used

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  • Catalyst components for olefin polymerization and their preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of catalyst components: take 30mL of hexane, 3.15mL of hexane solution of di-n-butylmagnesium (1M) and 1.0mL of isooctyl alcohol successively, raise the temperature to 50°C and keep stirring for half an hour to obtain a transparent solution, then add Hexane solution (10g / L) of polystyrene polyisobutylene diblock copolymer (polyisobutylene content is 72wt%) 2mL, cool down to -10 ℃, add 0.36mL silicon tetrachloride and 0.35mL titanium tetrachloride successively , After adding the material, the temperature was rapidly raised to 50°C within 10 minutes, and the reaction was maintained for 2 hours. The temperature of the catalyst suspension was lowered to room temperature, allowed to stand, settled, washed three times with hexane, the amount of hexane each time was 50mL, after the washing was completed, it was dried to obtain a brown solid flowable powder, that is, the catalyst component, and the average particle size was measured. The diameter is 32.3 μm. Elemen...

Embodiment 2

[0044] The preparation method of the catalyst component is the same as that in Example 1, except that the "rapid temperature rise to 50° C. within 10 minutes" in the preparation process of the catalyst component is changed to "programmed temperature rise to 50° C. within 120 minutes". The average particle diameter thereof was measured to be 46.8 μm. Elemental analysis (ICP): Ti: 4.35wt%, Mg: 19.72wt%.

[0045] The ethylene slurry polymerization evaluation method of the catalyst is the same as in Example 1, and the polymerization results are shown in Table 1.

Embodiment 3

[0047] The preparation method of the catalyst component is the same as in Example 1, except that the "1.0mL isooctyl alcohol" added during the preparation of the catalyst component is changed to "0.6mL n-butanol", and the "polystyrene polyisobutylene Diblock copolymer (polyisobutylene content is 72wt%) hexane solution (10g / L) 2mL" is changed to "polystyrene polyisobutylene diblock copolymer (polyisobutylene content is 72wt%) hexane solution ( 10g / L) 10mL". The average particle diameter thereof was measured to be 15.9 μm. Elemental analysis (ICP): Ti: 8.66wt%, Mg: 25.47wt%.

[0048] The ethylene slurry polymerization evaluation method of the catalyst is the same as in Example 1, and the polymerization results are shown in Table 1.

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Abstract

The present invention relates to a catalyst component for olefin polymerization, a preparation method thereof, a catalyst comprising the catalyst component and the use of the catalyst. The catalyst component is a reaction product comprising at least one organomagnesium compound, at least one titanium-containing compound, at least one hydroxyl-containing compound, at least one chlorine-containing organosilicon compound and at least one additive; wherein, the The additive is polystyrene block polyisobutylene polymer. The catalyst provided by the invention not only has high catalytic activity, good hydrogen adjustment sensitivity of the catalyst, and high bulk density of the obtained polymer, but also the corresponding catalyst has good particle shape and distribution, which is more conducive to the catalyst in the gas phase, slurry, etc. Use on polymerization process equipment.

Description

technical field [0001] The invention belongs to the technical field of catalyst components and their preparation, and in particular relates to a catalyst component for olefin polymerization and its preparation and application. Background technique [0002] Since the successful development of high-efficiency polyolefin catalysts in the 1970s, the world polyolefin industry has undergone tremendous changes. Over the past 20 years, with the development of olefin 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 polyolefin 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 co-grinding method, suspension impregnation method to chemical reaction method. [0003] In the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/02C08F4/649C08F4/654C08F4/651
CPCC08F4/6494C08F4/651C08F4/6546C08F10/00C08F110/02C08F2500/12C08F2500/18Y02P20/584
Inventor 王世波周俊领宋阳张磊吕新平黄廷杰周歆张长礼邢宝泉
Owner CHINA PETROLEUM & CHEM CORP