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Spherical double mesoporous montmorillonite composite carrier and its preparation method and application

A technology of composite carrier and montmorillonite, which is applied to the application of spherical double mesoporous montmorillonite composite carrier in the preparation of supported polyolefin catalysts. In the field of spherical double mesoporous montmorillonite composite carrier, it can solve the complicated operation and pollution. Environmental, low purification efficiency and other issues

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 polyethylene catalyst carrier, which in turn leads to the loading rate of the existing supported polyethylene catalyst carrier. low, which in turn leads to defects such as poor catalytic activity of the supported polyethylene catalyst prepared by the existing supported polyethylene catalyst carrier. A preparation method for a spherical double mesoporous montmorillonite composite carrier and a spherical composite carrier prepared by the method are provided. Dual mesoporous montmorillonite composite support, application of a spherical dual mesoporous montmorillonite composite support in the preparation of supported polyolefin catalysts

Method used

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  • Spherical double mesoporous montmorillonite composite carrier and its preparation method and application
  • Spherical double mesoporous montmorillonite composite carrier and its preparation method and application
  • Spherical double mesoporous montmorillonite composite carrier and its preparation method and application

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preparation example Construction

[0051] According to the present invention, the preparation method of the supported polyolefin catalyst can be a conventional method for preparing a supported polyolefin catalyst in the art, and the specific process can include: in the presence of an inert gas, the spherical double mesoporous membrane provided by the present invention is The destoned composite support is impregnated in the catalyst mother liquor containing magnesium salt and / or titanium salt, and then filtered and dried in sequence.

[0052] According to the present invention, the method for carrying out olefin polymerization using the supported polyolefin catalyst can be a conventional olefin polymerization method in the art, and the specific process can include: under the polymerization reaction conditions, in the presence of the supported polyolefin catalyst provided by the present invention Next, the olefin monomer is polymerized.

[0053] According to the present invention, the reaction conditions of the p...

Embodiment 1

[0070] (1) Preparation of spherical double mesoporous montmorillonite composite carrier

[0071] At 80°C, cetyltrimethylammonium bromide and tetraethyl orthosilicate are added to a 25% by weight ammonia solution, and then deionized water is added, wherein the amount of tetraethyl orthosilicate is 1g, ethyl tetrasilicate, hexadecyltrimethylammonium bromide, ammonia in ammonia water and water in a molar ratio of 1:0.37:2.8:142, and stirred at 80°C for 4 hours to obtain two Mesoporous molecular sieve material A1 with three-dimensional hexagonal channel distribution.

[0072] Concentration is that the water glass of 15% by weight and the sulfuric acid solution of 12% by weight are mixed with a weight ratio of 5:1 and contacted for 1.5h at 30° C., and then adjusted to pH with 98% by weight of sulfuric acid. 3. Obtain the reaction product silica gel B1.

[0073] Stir and mix 10g of mesoporous material A1, 10g of silica gel B1, and 10g of montmorillonite prepared above, pass the mi...

Embodiment 2

[0088] (1) Preparation of spherical double mesoporous montmorillonite composite carrier

[0089] At 50°C, cetyltrimethylammonium bromide and tetraethyl orthosilicate are added to the ammonia solution with a concentration of 25% by weight, and then deionized water is added, wherein the amount of tetraethyl orthosilicate is 1g, ethyl tetrasilicate, hexadecyltrimethylammonium bromide, ammonia in ammonia water and water in a molar ratio of 1:0.5:1.5:180, and stirred at 50°C for 7 hours to obtain two Mesoporous molecular sieve material A2 with hexagonal channel distribution.

[0090] The water glass with a concentration of 15% by weight and the sulfuric acid solution with a concentration of 12% by weight are mixed in a weight ratio of 4:1 and contacted for 2 hours at 40° C., and then the pH value is adjusted to 2 with a concentration of 98% by weight sulfuric acid. , to obtain the reaction product silica gel B2.

[0091] Stir and mix 20g of mesoporous material A2, 10g of silica g...

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Abstract

The invention relates to the field of catalysts, and discloses a spherical double-mesoporous montmorillonite composite carrier as well as a preparation method and application thereof. The method for preparing the spherical double-mesoporous montmorillonite composite carrier comprises the following steps: (1) in the presence of a template agent, contacting a silicon source and an ammonia water solution, so as to obtain a mesoporous material; (2) contacting sodium silicate with an inorganic acid solution to obtain silica gel; (3) mixing the mesoporous material, the silica gel and the montmorillonite, then sequentially carrying out filtration washing, ball milling, pulping and spray drying on the mixed materials, wherein the filtration washing in the step (3) is carried out in a ceramic membrane filter, and the content of sodium ions in the mixed material after filtration and washing is not higher than 0.2wt% in terms of sodium element content, the content of the template agent is not higher than 1 wt%. In the method, the ceramic membrane filter adopts cross-flow filtration, the separation is efficient and simple, the later calcination and taking off of the template agent does not need to be carried out again, the energy is saved, and the environment is protected.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing a spherical double mesoporous montmorillonite composite carrier and a spherical double mesoporous montmorillonite composite carrier prepared by the method, a spherical double mesoporous montmorillonite composite carrier Application of carrier in preparation of supported polyolefin catalyst. Background technique [0002] The development and application of polyethylene catalysts is another major breakthrough in the field of olefin polymerization catalysts after the traditional Ziegler-Natta catalysts, which makes the research on polyethylene catalysts enter a stage of rapid development. Because the homogeneous polyethylene 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02C08F10/00
CPCC08F4/02C08F10/00
Inventor 亢宇张明森吕新平
Owner CHINA PETROLEUM & CHEM CORP
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