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Preparation process of catalyst for ethylene polymerization

A technology for ethylene polymerization and catalyst, which is applied in the field of preparation of supported solid catalysts for ethylene polymerization, can solve problems such as undiscovered problems, and achieve the effects of being beneficial to industrial production, increasing titanium content, and improving particle size distribution.

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

[0003] CN1506384A used ultrasonic technology in the preparation process of polypropylene catalyst, and achieved good results, but in the existing literature, ultrasonic technology is used in the preparation process of polyethylene catalyst, and no

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Catalyst preparation:

[0016] Under the protection of nitrogen, 400ml of hexane and 5ml of tetrabutoxytitanium were added into the catalyst synthesis kettle, and stirred at room temperature for 10 minutes. Then add 10g of magnesium chloride, slowly raise the temperature to 60°C, and maintain the reaction for 60 minutes; then slowly add 4ml of n-butanol dropwise, keep the temperature in the kettle at 60°C, and keep the temperature constant for 60 minutes.

[0017] Turn on the ultrasonic wave and adjust the frequency to 35±1KHZ, maintain the reaction for 60 minutes, and keep the temperature in the kettle at 60°C.

[0018] Stop the ultrasonic wave, drop 15ml of titanium tetrachloride into the synthesis kettle within 30-45 minutes, turn on the ultrasonic wave again, adjust the frequency to 35±1KHZ, maintain the reaction for 60 minutes, turn off the ultrasonic wave, and react at a constant temperature for 60 minutes;

[0019] Stirring was stopped, and the upper mother liqu...

Embodiment 2

[0024] The catalyst component was prepared in the same manner as in Example 1, but when preparing the catalyst component, the ultrasonic frequency was changed from 35 ± 1KHZ to 40 ± 1KHZ. Ti (weight%) was 5.14%. Polymerization was carried out in the same manner as in Example 1 using this catalyst component. The results are listed in Table 1.

Embodiment 3

[0026] The catalyst component was prepared in the same manner as in Example 1, but when preparing the catalyst component, the ultrasonic frequency was changed from 35 ± 1KHZ to 30 ± 1KHZ. Ti (weight %) is 5.04%. Polymerization was carried out in the same manner as in Example 1 using this catalyst component. The results are listed in Table 1.

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Abstract

A process for preparing a Ziegler-Natta catalyst used for the sludge polymerization of ethene features that in its preparing procedure the ultrasonic wave technique is used for increasing the content of Ti and improving the granularity distribution of polymer.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for ethylene polymerization, in particular to a preparation method of a supported solid catalyst for ethylene polymerization. Background technique [0002] The literature shows that sound, as a way of energy input, can affect chemical reactions. Sound has broad application prospects in catalyst manufacturing, organic synthesis, molecular degradation and polymerization, mass transfer and heat transfer. JP76 127185 is a traditional polyethylene catalyst preparation method, that is, magnesium chloride is dissolved in alcohol, and the magnesium chloride is re-precipitated by pyrolysis of alcohol or chemical hydrolysis, and then the titanium component is loaded on the magnesium chloride to form an active center. [0003] CN1506384A used ultrasonic technology in the preparation process of polypropylene catalyst, and achieved good results, but it has not been found in the existing literature that ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F4/643
Inventor 石勤智赵青张文平张新军郑建坡陈东张丽青胡建东朱亚卿
Owner 北京燕化高新催化剂有限公司
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