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A kind of electron donor of ethylene polymerization catalyst, quasi-spherical catalyst, preparation method

A technology of catalysts and compounds, which is applied in the field of spherical catalysts, electron donors, and preparations. It can solve the problems of unsatisfactory application of catalysts, irregular catalyst shapes, and high production costs of catalysts, and achieve good hydrogen adjustment sensitivity and copolymerization performance. Good particle size distribution and low production cost

Active Publication Date: 2018-09-21
SICHUAN JINCHENG CHEM CATALYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the above-mentioned electron donor compounds are very expensive, resulting in high catalyst production costs; the catalysts prepared by some electron donors have irregular shapes, resulting in more fine powders produced in the polymerization process, which leads to the application of the obtained catalysts. unsatisfactory

Method used

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  • A kind of electron donor of ethylene polymerization catalyst, quasi-spherical catalyst, preparation method
  • A kind of electron donor of ethylene polymerization catalyst, quasi-spherical catalyst, preparation method
  • A kind of electron donor of ethylene polymerization catalyst, quasi-spherical catalyst, preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 4.76 g (50 mmol) of anhydrous magnesium chloride, 75 ml of decane and 16.3 g (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solution. To this solution, 15 mmol of hexamethylcyclotrisiloxane was added and stirred at 50° C. for 2 hours to dissolve hexamethylcyclotrisiloxane in the solution. All the homogeneous solution obtained above was cooled to room temperature, and then added dropwise to 150 mL of titanium tetrachloride maintained at 0° C. within 1 hour while stirring. After completion of the dropwise addition, the temperature of the mixture was maintained at 0°C for 1 hour, then raised to 120°C over 2 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with hexane and decane respectively until no precipitated titanium compound can be detected in the cleaning liquid, and a s...

Embodiment 2

[0041] 4.76 g (50 mmol) of anhydrous magnesium chloride, 75 ml of decane and 16.3 g (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solution. To this solution was added 15 mmol of octamethylcyclotetrasiloxane and stirred at 50° C. for 2 hours to dissolve octamethylcyclotetrasiloxane in the solution. All the homogeneous solution obtained above was cooled to room temperature, and then added dropwise to 150 mL of titanium tetrachloride maintained at 0° C. within 1 hour while stirring. After completion of the dropwise addition, the temperature of the mixture was maintained at 0°C for 1 hour, then raised to 120°C over 2 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with hexane and decane respectively until no precipitated titanium compound can be detected in the cleaning liquid, and ...

Embodiment 3

[0044] Example 3 4.76 grams (50 mmol) of anhydrous magnesium chloride, 75 milliliters of decane and 16.3 grams (125 mmol) of isooctyl alcohol were heated to 130° C. and allowed to react for 3 hours to obtain a homogeneous solution. To this solution, 15 mmol of dodecamethylcyclohexasiloxane was added and stirred at 50° C. for 2 hours to dissolve dodecamethylcyclohexasiloxane in the solution. All the homogeneous solution obtained above was cooled to room temperature, and then added dropwise to 150 mL of titanium tetrachloride maintained at 0° C. within 1 hour while stirring. After completion of the dropwise addition, the temperature of the mixture was maintained at 0°C for 1 hour, then raised to 120°C over 2 hours with stirring, and maintained at this temperature for 2 hours. After 2 hours of reaction, the resulting solid was separated by hot filtration. The solid catalyst is fully washed with hexane and decane respectively until no precipitated titanium compound can be detecte...

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Abstract

The invention relates to a solid ball-like titanium complex catalyst electron donor used for ethylene polymerization or copolymerization, catalyst components, a preparation method of catalyst components and a catalyst of the catalyst components. Structure of the electron donor is shown as a formula (I), and the catalyst components comprise a magnesium complex, a titanium complex, organic cyclosiloxane, an organic alcohol compound and an organic silicone compound. The catalyst is high in catalysis activity, hydrogen-regulation response capability and copolymerization performance when being used for ethylene polymerization and copolymerization, and can be used for polymerization and copolymerization of ethylene to produce polymers which are high in stacking density, narrow in size distribution and low in fine particle content.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysis, and relates to ethylene polymerization, copolymerization and catalysts, in particular to an electron donor for ethylene polymerization catalysts, a spherical catalyst and a preparation method. Background technique [0002] In recent years, research on high-performance olefin polymerization catalysts has been a hot topic in the field of polyolefin research. It is the goal of researchers to develop polyolefin catalysts with high catalytic activity, good hydrogen sensitivity, good copolymerization performance, uniform particle size distribution, less fine powder, low oligomer wax content, and stable and controllable production. A number of magnesium chloride-supported titanium-based Ziegler-Natta catalysts have been reported in the literature as catalysts for olefin polymerization and copolymerization. Depending on the polymerization process, the performance of the corresponding catal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/646C08F4/658
Inventor 刘富明张波高金龙
Owner SICHUAN JINCHENG CHEM CATALYST CO LTD
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