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Method for preparing solid catalyst in olefin polymerization catalyst

A solid catalyst, a technology for olefin polymerization, which is applied in the field of solid catalysts in the preparation of olefin polymerization catalysts, and can solve the problems of high production cost, many production links, and product quality fluctuating easily.

Active Publication Date: 2007-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production method has high investment in equipment and high production cost in the process of industrial realization, and the quality of products in multiple production links is easy to fluctuate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In a four-neck flask equipped with a stirrer, a reflux condenser is installed and a cumulative gas meter is connected to the reflux condenser. After the entire reaction device is fully replaced by nitrogen, 70.8ml of absolute ethanol and 1.26 grams of iodine are added to the container. , to dissolve it. Add 6 grams of metal magnesium inside, be warming up to the reflux temperature of ethanol under stirring condition, add dehydrated alcohol 47ml every 10 minutes from reflux, magnesium powder 6 grams, altogether 3 times. About 1 to 2 hours after the completion of the third addition, the liquid viscosity began to rise sharply (at this time, the reaction rate can be calculated to be about 85% by the amount of hydrogen generated), at this time, 259ml of toluene was added to the reaction system, and the reaction was continued until The whole reaction time is about 6 hours until no hydrogen gas is produced at the end of the reaction.

[0064] Then press filter the remaining l...

Embodiment 2

[0068] The basic preparation method is the same as in Example 1, except that the toluene added during the preparation of D is replaced with hexane. The solid catalyst component of gained is analyzed, and titanium content is 2.65 (wt)%, measures particle size distribution by laser particle size distribution instrument, D50: 32 microns, D10: 10 microns, D90: 65 microns, S ((D90-D10) / D50) was 1.72, and the particle sphericity L / W was 1.1. The catalyst activity is 44100 g polypropylene / g catalyst, and the polymer bulk density is 0.44 g / cm 3 .

Embodiment 3

[0070] The basic preparation method is the same as in Example 1, except that the reaction temperature during the preparation of D is controlled to 50°C. The solid catalyst component of gained is analyzed, and titanium content is 2.53 (wt)%, measures particle size distribution by laser particle size distribution instrument, D50: 25 microns, D10: 10 microns, D90: 55 microns, S ((D90-D10) / D50) was 1.8, and the particle sphericity L / W was 1.4. The catalyst activity is 35200 g polypropylene / g catalyst, and the polymer bulk density is 0.43 g / cm 3 .

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Abstract

The invention provides a preparation method of solid catalyst used in olefinic polymerization catalyst, the method synthetizes the solid catalyst of olefinic polymerization continuously by magnesium powder, simplifies the technology of preparing magnesium compounds solid firstly then preparing the solid catalyst of olefinic polymerization, reduces quantity of equipment needed in industrialization, has advantages of simple technics, easy operation, low industrializing installation cost, low production cost, easy controlled product quality. The ball solid catalyst of olefinic polymerization which D(50) is in range of 10-80 mum is produced through the method of the invention, the catalyst has particle sphericity height L / W<1.4 (L expresses the longest axle of the particle, W is the minimum axle of the particle), has advantages of high polymerization activity, hydrogen regulating sensibility, high isotacticity of the polymer, centralized particle-size distribution.

Description

technical field [0001] The invention relates to a method for preparing a solid catalyst in an olefin polymerization catalyst, in particular to a method for continuously preparing a solid catalyst in an olefin polymerization catalyst. Background technique [0002] With the development of the world's polyolefin industry, the continuous improvement and innovation of polyolefin production technology has made the polyolefin industry have higher and higher requirements for catalysts, and many different types of polyolefin catalysts have also appeared. Olefin polymerization catalysts supported by magnesium alkoxide have the advantages of high activity, good particle shape, high isotacticity, and good hydrogen tuning performance. [0003] At present, conventional methods for preparing spherical alkoxymagnesium supports include: [0004] 1. Use iodine as a catalyst to directly react magnesium metal with ethanol. When the viscosity of the reaction solution is controlled to rise sharp...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/643C08F4/647
Inventor 李树行兰丽华张海鹏刘进凯
Owner CHINA PETROLEUM & CHEM CORP
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