Polyolefin catalyst and polyolefin and their preparation method

A polyolefin catalyst and catalyst technology are applied in the field of homogeneous catalysis of olefin polymerization and can solve the problems of polluting the environment, low loading rate, and complicated operation.

Active Publication Date: 2020-10-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the low purification efficiency, poor effect, cumbersome operation, large water consumption and environmental pollution of the existing method for preparing the supported polyolefin catalyst carrier, which in turn leads to the loading rate of the existing supported polyolefin catalyst carrier. low, which in turn leads to defects such as poor catalytic activity of the supported polyolefin catalyst prepared by the existing supported polyolefin catalyst carrier, a preparation method of the supported polyolefin catalyst, a polyolefin catalyst prepared by the above method, a Method for polymerizing olefins and polyolefins prepared by the method

Method used

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  • Polyolefin catalyst and polyolefin and their preparation method
  • Polyolefin catalyst and polyolefin and their preparation method
  • Polyolefin catalyst and polyolefin and their preparation method

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preparation example Construction

[0038] According to the present invention, in step (2), the preparation method of the silica gel is not particularly limited, and may be a conventional method for preparing silica gel in the art. For example, the method includes: contacting water glass with an inorganic acid solution.

[0039] Preferably, the conditions for the contact of the water glass with the inorganic acid include: the temperature can be 10-60°C, preferably 20-40°C; the time can be 1-5 hours, preferably 1.5-3 hours, and the pH value is 2. -4. In order to facilitate the uniform mixing of various substances, the contact of the water glass and the inorganic acid is preferably carried out under stirring conditions.

[0040] According to the present invention, the water glass is a conventional sodium silicate aqueous solution, and its concentration may be 10-50% by weight, preferably 12-30% by weight.

[0041] According to the present invention, the type of the inorganic acid can be conventionally selected in the fi...

Embodiment 1

[0077] (1) Preparation of polyolefin catalyst

[0078] At 80°C, cetyltrimethylammonium bromide and ethyl orthosilicate were added to a 25% by weight aqueous ammonia solution, and then deionized water was added. The amount of ethyl orthosilicate added was 1g, the molar ratio of ethyl orthosilicate, cetyltrimethylammonium bromide, ammonia and water in ammonia water is 1:0.37:2.8:142, and stirred at 80°C for 4 hours to obtain two Mesoporous molecular sieve material A1 with hexagonal channel distribution.

[0079] The water glass with a concentration of 15% by weight and a sulfuric acid solution with a concentration of 12% by weight were mixed in a weight ratio of 5:1 and contacted and reacted at 30°C for 1.5h, and then adjusted the pH value to with 98% by weight sulfuric acid 3. Obtain the reaction product silica gel B1.

[0080] Stir and mix the 10g mesoporous material A1, 10g silica gel B1, and 10g attapulgite prepared above, pass the mixture into the ceramic membrane filtration sys...

Embodiment 2

[0095] (1) Preparation of polyolefin catalyst

[0096] At 50°C, cetyltrimethylammonium bromide and ethyl orthosilicate were added to a 25% by weight aqueous ammonia solution, and then deionized water was added. The amount of ethyl orthosilicate added was 1g, the molar ratio of ethyl orthosilicate, cetyltrimethylammonium bromide, ammonia and water in ammonia water is 1:0.5:1.5:180, and stirred at 50°C for 7 hours to obtain a Mesoporous molecular sieve material A2 with hexagonal channel distribution.

[0097] The water glass with a concentration of 15% by weight and a sulfuric acid solution with a concentration of 12% by weight were mixed in a weight ratio of 4:1 and contacted for reaction at 40°C for 2 hours, and then adjusted to pH 2 with sulfuric acid with a concentration of 98% by weight , The reaction product silica gel B2 is obtained.

[0098] Stir and mix the 20g mesoporous material A2, 10g silica gel B2 and 8g attapulgite prepared above, pass the mixture into the ceramic memb...

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Abstract

The invention relates to the field of catalysts, and discloses a polyolefin catalyst, a polyolefin, and a preparation method of the polyolefin catalyst and the polyolefin. The method for preparing thepolyolefin catalyst comprises the following steps: (1) enabling a silicon source to contact an ammonia water solution in the presence of a template agent to obtain a mesoporous material; (2) mixing the mesoporous material with silica gel and attapulgite, then sequentially carrying out filtration washing, ball milling, pulping and spray drying on the mixed materials, so as to obtain a spherical double-mesoporous attapulgite composite carrier; and (3) in the presence of inert gas, impregnating the spherical double-mesoporous attapulgite composite carrier in a catalyst mother liquor containing amagnesium salt and / or a titanium salt, and then sequentially carrying out filtration and drying, wherein the filtering washing in the step (2) are carried out in a ceramic membrane filter, and the content of sodium ions in the mixed material after the filtering washing is not higher than 0.2 wt% in terms of sodium element, and the content of the template agent is not higher than 1 wt%. The methodis efficient, simple, energy efficient and environmentally friendly.

Description

Technical field [0001] The present invention relates to a homogeneous catalytic olefin polymerization reaction technology, in particular to a method for preparing a polyolefin catalyst, a polyolefin catalyst prepared by the above method, a method for olefin polymerization, and a polyolefin prepared by the method. Background technique [0002] The development and application of polyolefin catalysts is another major breakthrough in the field of olefin polymerization catalysts after the traditional Ziegler-Natta catalysts. This has brought the research of polyolefin catalysts into a stage of rapid development. Because the homogeneous polyolefin catalyst requires a large amount of catalyst to achieve high activity, the production cost is high, and the obtained polymer has no particle shape, it cannot be used in the widely used slurry method or gas phase polymerization process. An effective way to overcome the above problems That is, the soluble polyolefin catalyst is supported. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02C08F4/10C08F4/16C08F110/02
CPCC08F110/02C08F4/02C08F4/10C08F4/16C08F2500/12C08F2500/18
Inventor 亢宇张明森吕新平周俊岭徐世媛张志会
Owner CHINA PETROLEUM & CHEM CORP
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