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Ball shape catalyst for ethylene polymerization and preparation process thereof

An ethylene polymerization and catalyst technology, applied in the field of spherical Ziegler-Natta catalyst and its preparation, can solve the problems of poor fluidity, wide particle size distribution, high content of fine powder, etc., and achieve hydrogen sensitivity and excellent copolymerization performance , Conducive to industrial production, the effect of high polymerization activity

Inactive Publication Date: 2006-11-15
北京燕化高新催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to change the disadvantages of small particle size, wide particle size distribution, low bulk density, poor fluidity and high fine powder content of catalysts used in ethylene slurry and gas phase polymerization processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of solid catalyst components

[0023] Under nitrogen protection, start stirring, add 54ml of white oil, 70ml of methyl silicone oil, 10g of magnesium chloride, and 17ml of ethanol to the reaction kettle in sequence, then slowly raise the temperature to 130°C, and react at a constant temperature under a pressure of 0.2MPa for 3 hours to obtain a homogeneous solution of magnesium chloride. Open the emulsifier, keep the reactor pressure at 0.05MPa, transfer the obtained magnesium chloride homogeneous solution to the 1000ml hexane solution that has been pre-cooled to -22°C through the emulsifier, keep stirring at low temperature for 1 hour, and then naturally heat up to At room temperature, the liquid was pressed out, washed with hexane four times, 100ml each time, and then dried with nitrogen at 60°C to obtain a magnesium chloride spherical carrier. The molar ratio of magnesium alkoxide was 2.47 for sampling analysis.

[0024] Transfer the obtained magnesium ch...

Embodiment 2

[0032] The catalyst component was prepared in the same manner as in Example 1, but when preparing the catalyst component, the amount of silicon tetrachloride was changed from 35ml to 50ml. Ti (weight%) was 4.61%. Polymerization was carried out in the same manner as in Example 1 using this catalyst component. The results are listed in Table 1 and Table 2.

Embodiment 3

[0034] The catalyst component was prepared in the same manner as in Example 1, but when preparing the catalyst component, the amount of silicon tetrachloride was changed from 35ml to 17ml. Ti (% by weight) was 5.11%. Polymerization was carried out in the same manner as in Example 1 using this catalyst component. The results are listed in Table 1 and Table 2.

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PUM

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Abstract

A spherical Ziegler-Natta catalyst used for sludge or gas-phase polymerization of ethene and its preparing process are disclosed. Said catalyst along with organoaluminum cocatalyst can be used for the homopolymerization of ethene or copolymerization of ethene and alpha-olefin to obtain spherical products.

Description

technical field [0001] The invention relates to a spherical Ziegler-Natta catalyst which can be used in ethylene slurry and gas phase polymerization processes and a preparation method thereof. Background technique [0002] With the development of olefin polymerization technology, people have gradually realized that the ideal olefin polymerization catalyst should not only have high activity, but also the catalyst morphology, including catalyst particle size and shape, is also an important indicator that needs to be precisely controlled. Especially in recent years, with the continuous development of the gas phase polymerization process, in order to avoid abnormal fluidization state and fine powder causing reactor clogging, it is more and more important to use controllable morphology catalysts to implement polymer morphology control. The spherical polymer prepared by the spherical catalyst has the characteristics of larger particle size, narrower particle size distribution, hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/02C08F4/64
Inventor 张新军张文平石勤智赵青胡建东郑建坡陈东黄庆军朱亚卿
Owner 北京燕化高新催化剂有限公司
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