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Al2O3-SiO2 ceramic membrane and preparation method thereof

A technology of al2o3-sio2 and ceramic membrane, which is applied in the field of membrane separation, can solve the problems of high cost, high price, and complicated manufacturing process, and achieve the effects of low cost, increased membrane flux, and high mechanical strength

Inactive Publication Date: 2012-06-27
XIAMEN LEEBAM MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are two main obstacles to the application of inorganic ceramic membranes in water treatment. One is the complicated manufacturing process, high cost and high price; the other is the membrane flux problem. Only by overcoming membrane fouling and improving the membrane filtration In order to truly promote and apply it to various fields of water treatment

Method used

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Examples

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Embodiment Construction

[0023] The following specific examples further illustrate the present invention.

[0024] (1) Preparation of Al2O3-SiO2 ceramic film

[0025] Step 1: Preparation of Support

[0026] Mix and stir the raw materials used for the support body evenly, use the blended particle sintering method, at a temperature of 1200°C-1600°C, sinter for 4-6h, and naturally cool down to obtain the support body; the mass percentages of the raw materials used for the support body and each component are respectively : ceramic membrane support body powder 90-95%, pore-forming agent 1-5%, binding agent 0.5-5%, sintering aid 0.5-5%, described ceramic membrane support body powder is nanometer Al2O3, so The above-mentioned binder is any one or several of polyvinyl alcohol, polyacrylic acid or phenolic resin, and the described sintering aid is any one or a mixture of several of kaolin, bentonite, and magnesium oxide. The pore former is carbon powder.

[0027] Step 2: Preparation of film-making solution ...

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Abstract

The invention discloses a Al2O3-SiO2 ceramic membrane which comprises a support body and a separation layer and is characterized in that the separation layer is prepared by coating a membrane making solution comprising nano SiO2, PVA (polyvinyl acetate), glycerol and water on the inner surface of the support body by adopting a melting-sol-gel process. The invention also discloses a preparation method of the Al2O3-SiO2 ceramic membrane, and the method comprises the following steps of: preparing the nano Al2O3 support body by adopting a blended particle sintering process; and coating the membrane making solution comprising the nano SiO2, the PVA, the glycerol and the like on the inner surface of the support body by adopting the melting-sol-gel process to form the Al2O3-SiO2 ceramic membrane. By adopting the technical scheme, the Al2O3-SiO2 ceramic membrane has the characteristics of low cost, simpleness and easiness for acquisition, increased membrane flux, high mechanical strength, pollution resistance, uniform membrane aperture, thin membrane wall, large permeation flux, raw material saving, easy realization of miniaturization and simplified structure of separation equipment, and the like.

Description

technical field [0001] The invention relates to the field of membrane separation, in particular to an Al2O3-SiO2 ceramic membrane and a preparation method thereof. Background technique [0002] Research on ceramic membranes began in the 1940s, and its development can be divided into three stages. From the nuclear industry period for uranium isotope separation to the liquid separation period based on inorganic microfiltration membranes and ultrafiltration membranes and the comprehensive development period centered on membrane catalytic reactions. In the 1990s, the emergence of sol-gel technology marked that the research and application of inorganic membranes entered the third stage, that is, the research stage of gas separation applications and ceramic membrane separator-reactor composite components. [0003] Ceramic membrane separation technology is widely used in food, medicine, biology, environmental protection, etc. , chemical industry, metallurgy, energy, petroleum, wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D71/02B01D67/00
Inventor 王俊川江良涌俞海桥尹娟
Owner XIAMEN LEEBAM MEMBRANE TECH
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