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Preparation method of olefin polymerization catalyst slurry

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization, can solve the problems of difficult dispersion and uniformity, prone to aggregation or agglomeration, and large surface energy.

Active Publication Date: 2012-04-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is generally known to disperse solid particles in a liquid to prepare a slurry, which can be achieved by mechanical stirring. However, since the olefin polymerization catalyst components are fine particles in the range of 0.1 to 100 microns, the specific surface area is large and the surface energy is large. Olefin polymerization catalyst components tend to aggregate or agglomerate during drying into dry powder. Simply add the dry powder of olefin polymerization catalyst components to mineral oil and stir. The aggregated or agglomerated dry powder particles are difficult to stir to disperse evenly. Therefore, the prepared The slurry settling speed is fast and the stability is poor

Method used

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  • Preparation method of olefin polymerization catalyst slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The catalyst component was prepared according to the method in Example 1 of patent CN85100997, except that the catalyst component was washed with hexane and not vacuum-dried. It was washed three times with 60 ml of isopentane, and then added with 30 ml of isopentane to prepare a suspension. Prepared so many times to obtain 500 ml of suspension.

[0022] In a dry 250ml round bottom flask, add 28 grams of white oil, then add 90ml of the above suspension, vacuum dry under stirring conditions, the temperature is 60°C, after 2 hours, take 20ml of catalyst slurry and inject 25ml of graduated In the glass tube, read the height of the supernatant after standing still for 72 hours, and calculate the sedimentation velocity.

Embodiment 2

[0024] The catalyst component was prepared according to the method in Example 1 of patent CN85100997, except that the catalyst component was washed with hexane and not vacuum-dried. It was washed three times with 60 ml of isopentane, and then added with 30 ml of isopentane to prepare a suspension. Prepared so many times to obtain 500 ml of suspension.

[0025] In a dry 250ml round bottom flask, add 28g of white oil, then add 90ml of the above suspension, vacuum dry under stirring conditions, the temperature is 40°C, after 2 hours, take 20ml of catalyst slurry and inject 25ml of graduated In the glass tube, read the height of the supernatant after standing still for 72 hours, and calculate the sedimentation velocity.

Embodiment 3

[0027] The catalyst component was prepared according to the method in Example 1 of patent CN85100997, except that the catalyst component was washed with hexane without vacuum drying, and 30 ml of hexane was added to prepare a suspension. Prepared so many times to obtain 500 ml of suspension.

[0028] In a dry 250ml round bottom flask, add 28 grams of white oil, then add 90ml of the above suspension, vacuum dry under stirring conditions, the temperature is 60°C, after 2 hours, take 20ml of catalyst slurry and inject 25ml of graduated In the glass tube, read the height of the supernatant after standing still for 72 hours, and calculate the sedimentation velocity.

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Abstract

The invention relates to a preparation method of olefin polymerization catalyst slurry. The preparation method of the olefin polymerization catalyst slurry is characterized in that in olefin polymerization catalyst component preparation, after low-boiling point alkane washing, catalyst suspension is formed and then is directly mixed with mineral oil; and the mixture is subjected to vacuum drying with stirring. The olefin polymerization catalyst slurry obtained by the preparation method has a slow sedimentation rate and good stability, and is suitable for continuous production adopting a vaporphase method-based polypropylene production device.

Description

technical field [0001] The invention relates to a preparation method of olefin polymerization catalyst slurry, which belongs to the field of olefin polymerization. Background technique [0002] The olefin polymerization catalyst components used to prepare polyolefins are generally known. Generally speaking, in the batch polymerization production process, the olefin polymerization catalyst components enter the reactor in the form of powder through inert gas purging or solvent flushing; In the continuous polymerization production process, the olefin polymerization catalyst components generally enter the reactor in the form of slurry. [0003] In the continuous production process of the gas-phase polypropylene plant, the olefin polymerization catalyst component is usually continuously fed into the reactor in the form of slurry through a metering pump under stirring. This feeding method has the advantages of accurate measurement, safety and controllability, etc. The slurry is ma...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/64C08F10/06C08F2/34
Inventor 郭正阳洪挺王宇付梅艳刘萃莲雷世龙任春红王迎
Owner CHINA PETROLEUM & CHEM CORP
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