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Polyolefin catalyst with spherical double mesoporous composite material as carrier, polyolefin and preparation method thereof

A technology of polyolefin catalysts and mesoporous materials, applied in chemical recycling, bulk chemical production, etc., can solve problems such as poor catalytic activity, low purification efficiency, cumbersome operation, etc., achieve low melt index, simple separation process, and easy operation easy effect

Active Publication Date: 2022-07-12
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 with spherical double mesoporous composite material as carrier, polyolefin and preparation method thereof
  • Polyolefin catalyst with spherical double mesoporous composite material as carrier, polyolefin and preparation method thereof
  • Polyolefin catalyst with spherical double mesoporous composite material as carrier, polyolefin and preparation method thereof

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Experimental program
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preparation example Construction

[0059] In the preparation method of the spherical double-mesoporous composite material carrier in the prior art, the step of removing the template agent after spray drying is usually included, for example, the template agent is removed by a calcination method. Since the method of the present invention uses the ceramic membrane for washing treatment, the step of calcining and removing the template agent is not required in the method for preparing the spherical double-mesoporous composite material carrier of the present invention.

[0060] According to the present invention, in step (d), the solution containing magnesium component precursor and / or titanium component precursor may be an organic solution containing magnesium salt and / or titanium salt, and the organic solution in the organic solution The solvent can be isopropanol and tetrahydrofuran, and the volume ratio of tetrahydrofuran and isopropanol can be 1:1-3, preferably 1:1-1.5.

[0061]According to the present invention...

Embodiment approach

[0096] According to a preferred embodiment of the present invention, the polyolefin is polyethylene.

[0097] The present invention will be described in detail below by means of examples.

[0098] In the following examples and comparative examples,

[0099] The triblock copolymer polyethylene oxide-polypropylene oxide-polyethylene oxide was purchased from Aldrich Company, abbreviated as P123, and the molecular formula is EO 20 PO 70 EO 20 , the substance with the registration number of 9003-11-6 in the American Chemical Abstracts, the number average molecular weight Mn is 5800.

[0100] The ceramic membrane filter used is an inorganic ceramic membrane element numbered JWCM19*30 purchased from Jiangsu Jiuwu High-tech Co., Ltd. and the packed membrane area is 0.5m 2 The parameters of the inorganic ceramic membrane element include: the shape is multi-channel cylindrical, the number of channels is 19, the channel diameter is 4mm, the length is 1016mm, and the outer diameter (dia...

Embodiment 1

[0105] This example is used to illustrate the polyolefin catalyst of the present invention and its preparation method

[0106] (1) Preparation of the carrier

[0107] 2g triblock copolymer template P123 and 15g N,N-dimethylformamide (DMF) were added to a solution of 11.2g 37% hydrochloric acid and 64mL water, mixed and stirred until P123 was completely dissolved; then 4.45g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, and at a temperature of 40 °C, the solution was transferred to a polytetrafluoroethylene-lined reaction kettle after stirring for 1 h at a mechanical stirring rate of 350 r / min. , the mesoporous material filter cake A1 was obtained by filtration after being crystallized in an oven at 60 °C for 24 hours.

[0108] After the water glass with a concentration of 15% by weight and the sulfuric acid solution with a concentration of 12% by weight were uniformly mixed at a weight ratio of water glass and sulfuric acid of 5:1, ...

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Abstract

The invention relates to the technical field of homogeneous catalysis of olefin polymerization, and discloses 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. The method for preparing a polyolefin catalyst comprises: (a) preparing a two-dimensional hexagonal mesoporous material filter cake; (b) preparing a silica gel filter cake; (c) ball milling the mesoporous material filter cake and the silica gel filter cake separately or mixed , the ball-milled product is washed with a ceramic membrane filter, and then spray-dried to obtain a spherical double-mesoporous composite carrier; (d) the carrier is loaded with a magnesium component and / or a titanium component. The method is efficient, simple, energy-saving and environmentally friendly, the prepared polyolefin catalyst has high activity, and can obtain polyolefin products with lower bulk density and melt index.

Description

technical field [0001] The present invention relates to the technical field of homogeneously catalyzed olefin polymerization, 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, which makes the research of polyolefin catalysts enter a stage of rapid development. Due to the large amount of catalyst required for the homogeneous polyolefin catalyst to achieve high activity, the production cost is high, and the obtained polymer has no granular shape, which cannot be used in the widely used slurry method or gas phase polymerization process. An effective method to overcome the above problems That is, the soluble polyolefin catalyst is l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/02
CPCC08F10/02C08F4/025Y02P20/52Y02P20/584
Inventor 亢宇吕新平
Owner CHINA PETROLEUM & CHEM CORP