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Preparation method of olefin polymerization catalyst component slurry

An olefin polymerization and catalyst technology, which is applied in the field of preparation of olefin polymerization catalyst slurry, can solve the problems of large surface energy, difficulty in stirring and dispersing dry powder particles uniformly, and fast sedimentation speed of slurry.

Active Publication Date: 2012-05-16
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 are prone to aggregation or agglomeration during the process of 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 and disperse evenly, so the prepared slurry settles Fast speed, poor stability

Method used

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  • Preparation method of olefin polymerization catalyst component slurry

Examples

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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 without vacuum drying, and 30 ml of hexane was added to prepare a suspension. Prepared so many times to obtain 500 ml of suspension.

[0022] In a dry 250ml round-bottomed flask, add 28 grams of white oil, then add 90 milliliters of the above-mentioned suspension, and carry out vacuum drying under stirring for 6 hours, and the temperature of the water bath is 50 ° C. When the drying is carried out for 4 hours, carry out ultrasonication for 1 Hours, ultrasonic frequency 50HZ. Then get 20 milliliters of catalyst slurry and inject in 25 milliliters of scaled glass tubes, read the height of the supernatant after standing for 72 hours, 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 without vacuum drying, and 30 ml of hexane was added to prepare a suspension. Prepared so many times to obtain 500 ml of suspension.

[0025] In a dry 250ml round-bottomed flask, add 28 grams of white oil, then add 90 milliliters of the above suspension, and carry out vacuum drying under stirring for 6 hours, the temperature of the water bath is 40 ° C, when the drying is carried out for 4 hours, ultrasonic for 1 hour , Ultrasonic frequency 50HZ. Then get 20 milliliters of catalyst slurry and inject in 25 milliliters of scaled glass tubes, read the height of the supernatant after standing for 72 hours, 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-bottomed flask, add 28 grams of white oil, then add 90 milliliters of the above-mentioned suspension, and carry out vacuum drying under stirring for 6 hours, and the temperature of the water bath is 50 ° C. When the drying is carried out for 4 hours, carry out ultrasonication for 1 Hours, ultrasonic frequency 70HZ. Then get 20 milliliters of catalyst slurry and inject in 25 milliliters of scaled glass tubes, read the height of the supernatant after standing for 72 hours, calculate the sedimentation velocity.

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Abstract

The invention relates to a preparation method of olefin polymerization catalyst component slurry; during the preparation process of olefin polymerization catalyst components, a catalyst suspension is mixed with mineral oil, and vacuum drying is performed under an ultrasonic condition; the catalyst slurry obtained by the method has a low sedimentation rate, good stability, and is suitable for continuous production of gas-phase polypropylene devices.

Description

technical field [0001] The invention relates to a preparation method of olefin polymerization catalyst slurry. 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 mainly composed of The catalyst component is composed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649C08F10/06C08F2/34
Inventor 洪挺郭正阳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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