A kind of preparation method of separation membrane based on high solid content silicon carbide slurry

A technology of silicon carbide slurry and high solid content, which is applied in the field of ceramic membranes, can solve the problems of poor mechanical strength and complicated preparation process, and achieve the effect of simple equipment, simple preparation method and high early strength

Active Publication Date: 2022-07-19
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for preparing a separation membrane based on a high-solid-content silicon carbide slurry to solve the problems of poor mechanical strength and complex preparation process of the existing silicon carbide ceramic membrane; %, a silicon carbide slurry with a viscosity of 800-1000mPa·s, and then use the method of spraying to evenly spray the slurry on the support body to obtain a separation membrane through a certain sintering process; the preparation process of the present invention can effectively avoid Problems such as cracking during the sintering process after the separation membrane is formed, significantly improve the strength, yield and durability of the silicon carbide separation membrane, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a separation membrane based on high solid content silicon carbide slurry, specifically comprising:

[0031]1) Preparation of carboxylate emulsion: 0.8% of sodium tetrapropylene benzene sulfonate relative to the mass of the polymer monomer and 0.8% of the OP-10 relative to the mass of the polymer monomer were uniformly dissolved in 42 parts by weight of water, followed by Add 58 parts by weight of polymerized monomers (the mass ratio of vinyl acetate, isooctyl acrylate and butyl acrylate is 2:2:1), under 160r / min stirring condition, mix well to obtain pre-emulsion; 25% of the mass of the pre-emulsion, add potassium persulfate of 1% relative to the mass of the polymer monomer, and heat up to 70 ° C to carry out insulation reaction; then add the remaining pre-emulsion and add, continue to carry out 70 ° C insulation reaction Then naturally cooled to room temperature, and added 1% sodium bicarbonate relative to the mass of the polymer monomer to adjus...

Embodiment 2

[0037] A method for preparing a separation membrane based on high solid content silicon carbide slurry, specifically comprising:

[0038] 1) Preparation of carboxylate emulsion: 1.5% of sodium tetrapolypropylene benzene sulfonate relative to the mass of the polymer monomer and 1.5% of the polyacrylamide relative to the mass of the polymer monomer were uniformly dissolved in 40 parts by weight of water, followed by Add 60 parts by weight of polymerized monomers (the mass ratio of vinyl acetate, isooctyl acrylate and butyl acrylate is 2:2:2), under 200r / min stirring conditions, mix well to obtain a pre-emulsion; 25% of the mass of the pre-emulsion, add 1.5% of potassium persulfate relative to the mass of the polymer monomer, and heat up to 75 ° C to carry out insulation reaction; then add the remaining pre-emulsion to add, continue to carry out 75 ° C insulation reaction ; Then naturally cool to room temperature, and add 1.5% sodium bicarbonate relative to the mass of the polyme...

Embodiment 3

[0044] A method for preparing a separation membrane based on high solid content silicon carbide slurry, specifically comprising:

[0045] 1) Preparation of carboxylate emulsion: a compound of sodium tetrapropylene benzene sulfonate and sodium dodecyl sulfate with a mass of 1.5% relative to the mass of the polymer monomer (the two are compounded in a mass ratio of 1:1.5) And the relative polymer monomer mass 1.5% P-10 and polyacrylamide compound (the two are compounded according to the mass ratio of 1:1.5) are evenly dissolved in 45 weight parts of water, and then 55 weight parts of polymerized monomers are added. (the mass ratio of vinyl acetate, isooctyl acrylate and butyl acrylate is 3:3:2), under stirring conditions of 200r / min, mix well to obtain a pre-emulsion; take 20% of the mass of the obtained pre-emulsion %, add 2% initiator (the mass ratio of potassium persulfate and ammonium persulfate is 1:1) relative to the mass of the polymer monomers, and be warming up to 75 ° ...

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Abstract

The invention discloses a preparation method of a separation membrane based on silicon carbide slurry with high solid content. First, silicon carbide slurry with a solid content of 58-70 vol% and a viscosity of 800-1000 mPa·s is prepared, and then a spraying method is adopted. The slurry is uniformly sprayed on the support body and undergoes a certain sintering process to obtain a separation membrane; the preparation process of the present invention can effectively avoid problems such as cracking during the sintering process after the separation membrane is formed, and significantly improve the strength of the silicon carbide separation membrane , yield and durability, and the preparation method involved is simple, which is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of ceramic membranes, and in particular relates to a preparation method of a separation membrane based on high solid content silicon carbide slurry. Background technique [0002] With the rapid development of my country's economy, large-scale industrial production processes will generate and discharge a large amount of high-temperature exhaust gas with complex and harmful components, causing a lot of waste of heat energy and useful resources, and causing a series of problems that are not conducive to the development of the ecological environment. In response to this problem, my country has put forward the concept of industrial development of "green production", strengthened the supervision of industrial pollution discharge, and adopted corresponding technologies to reduce the discharge of harmful pollutants. For example, the traditional wet separation and dust removal technology is used to treat the exhaust ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/573C04B35/622C04B38/00B01D71/02B01D67/00B01D69/02
CPCC04B35/62218C04B35/565C04B35/573C04B38/0054B01D71/02B01D71/027B01D67/0041B01D67/0039B01D67/0044B01D69/02C04B2235/3418C04B2235/6562
Inventor 徐慢沈凡韦国苏季家友戴武斌陈常连朱丽王树林石和彬薛俊曹宏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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