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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 high material price, difficult control, complicated forming steps and the like

Active Publication Date: 2020-07-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 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 2mL of hexane solution (10g / L) of polystyrene polydimethylsiloxane diblock copolymer A (polydimethylsiloxane content: 67wt%), cooled to -50°C, and added 3.15mL The hexane solution of boron trichloride (1M) and 0.35 mL of titanium tetrachloride were added, and 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...

Embodiment 2

[0044] The preparation method of the catalyst component is the same as in Example 1, except that the "0.35mL titanium tetrachloride" added during the preparation of the catalyst component is changed to "1mL titanium tetrachloride". The average particle diameter thereof was measured to be 33.8 μm. Elemental analysis (ICP): Ti: 14.25wt%, Mg: 15.63wt%.

[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 "polystyrene polydimethylsiloxane diblock copolymer A (polydimethylsiloxane) added during the preparation of the catalyst component content is 67wt%)" is changed to "polystyrene polydimethylsiloxane diblock copolymer B (polydimethylsiloxane content is 14wt%)". The average particle diameter thereof was measured to be 35.2 μm. Elemental analysis (ICP): Ti: 10.26wt%, Mg: 18.65wt%.

[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 invention relates to a catalyst component for olefin polymerization, a preparation method thereof, a catalyst with the catalyst component, and application of the catalyst. The catalyst component contains a reaction product of at least one organic magnesium compound, at least one titanium-containing compound, at least one hydroxyl compound, at least one chlorine-containing organoboron compoundand at least one additive, wherein the additive is a polystyrene blocked polydimethylsiloxane polymer. The catalyst provided by the invention is not only high in catalysis activity, good in catalyst hydrogen regulation sensitivity and high in polymer piling density, but also good in granule morphology and distribution, and thus application of the catalyst to polymerization process devices for gaseous phases, slurry and the like is relatively well facilitated.

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): C08F10/00C08F110/02C08F4/646C08F4/658
CPCC08F10/00C08F110/02C08F4/6465C08F4/6588C08F2500/12C08F2500/18
Inventor 王世波周俊领张磊吕新平黄廷杰周歆张长礼邢宝泉
Owner CHINA PETROLEUM & CHEM CORP