Silica gel supporter, supported catalyst and preparation method thereof

A supported catalyst and silica gel technology, applied in the field of supported catalysts, can solve the problem of insufficient catalytic activity, achieve low melt index, low bulk density, and reduce powder agglomeration

Inactive Publication Date: 2018-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the catalytic activity of the silica gel carrier after loading the polyethylene catalyst is not high enough, and it is urgent to d

Method used

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  • Silica gel supporter, supported catalyst and preparation method thereof
  • Silica gel supporter, supported catalyst and preparation method thereof
  • Silica gel supporter, supported catalyst and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0020] The invention provides a method for preparing a silica gel carrier, the method comprising:

[0021] (1) Mix and contact water glass, polyol, n-butanol and inorganic acid, and use a ceramic membrane filter to filter and / or wash the mixture obtained after the contact to obtain a silica gel cake;

[0022] (2) Ball mill the silica gel cake obtained in step (1), and then perform spray drying to obtain a silica gel carrier.

[0023] According to the present invention, in step (1), the amount of water glass, polyol, n-butanol and inorganic acid can be conventionally selected in the field, for example, the amount of water glass, inorganic acid, n-butanol and polyol The weight ratio of the amount can be 3-6:0.5-4:0.5-1.5:1, preferably 3-6:1-3:1:1. The amount of the inorganic acid is such that the pH value of the mixed contact in step (1) is 2-4.

[0024] In the present invention, the water glass generally refers to an aqueous solution of sodium silicate, the concentration of which may ...

Example Embodiment

[0058] Example 1

[0059] This example is used to illustrate the silica gel carrier and supported catalyst of the present invention and the preparation method thereof

[0060] (1) Preparation of silica gel carrier

[0061] The water glass with a concentration of 15% by weight, a sulfuric acid solution with a concentration of 12% by weight, n-butanol and glycerol in a weight ratio of 5:1:1:1 were mixed and contacted and reacted at 20°C for 1.5 hours, and then used The pH value of sulfuric acid with a concentration of 98% by weight is adjusted to 3, and then the obtained reaction material is suction filtered and washed with a ceramic membrane filter to a sodium ion content of 0.02% by weight to obtain a silica gel cake. Among them, the membrane module operating pressure is 3.3bar, the circulation side membrane inlet pressure is 4bar, the circulation side membrane outlet pressure is 2.5bar, the circulation side membrane surface flow rate is 4m / s, the permeate side pressure is 0.3bar, a...

Example Embodiment

[0073] Example 2

[0074] This example is used to illustrate the silica gel carrier and supported catalyst of the present invention and the preparation method thereof

[0075] (1) Preparation of silica gel carrier

[0076] The water glass with a concentration of 15% by weight, a sulfuric acid solution with a concentration of 12% by weight, n-butanol and glycerol in a weight ratio of 6:3:1:1 were mixed and contacted for reaction at 60°C for 3 hours, and then used The pH value of sulfuric acid with a concentration of 98% by weight is adjusted to 3, and then the obtained reaction material is suction filtered and washed with a ceramic membrane filter to a sodium ion content of 0.02% by weight to obtain a silica gel cake. Among them, the membrane module operating pressure is 3bar, the circulation side membrane inlet pressure is 3.5bar, the circulation side membrane outlet pressure is 2.5bar, the circulation side membrane surface flow rate is 4.5m / s, the permeate side pressure is 0.4bar, ...

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Abstract

The invention relates to the field of catalysts, discloses a silica gel supporter, a preparation method thereof, a supported catalyst and a preparation method thereof. The preparation method of the silica gel supporter includes the steps of firstly, mixing sodium silicate, polyol, n-butyl alcohol and inorganic acid to obtain a mixture, and using a ceramic membrane filter to perform filtering and/or washing on the obtained mixture to obtain silica gel filter cake; secondly, subjecting the silica gel filter cake obtained in the first step to ball milling, and performing spray drying to obtain the silica gel supporter. The silica gel supported polyethylene catalyst is high in catalytic activity, and an obtained polyethylene product is low in bulk density and melt index.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular to a method for preparing a silica gel carrier and a silica gel carrier prepared by the method, a supported catalyst, a method for preparing a supported catalyst and a supported catalyst prepared by the method. 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 way to overcome the above problems It is to carry out loading treatment on the soluble ...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F4/02C08F4/646
CPCC08F4/025C08F4/6465C08F110/02
Inventor 亢宇张明森吕新平
Owner CHINA PETROLEUM & CHEM CORP
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