A kind of preparation method of ceramic composite membrane

A technology of ceramic composite membranes and porous ceramics, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high energy consumption, poor membrane layer binding force, long preparation cycle, etc., and achieve low energy consumption , easy to operate, avoid the effect of poor binding force

Active Publication Date: 2020-04-03
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of traditional nanofiltration membranes requires repeated preparation of multilayer ceramic membranes with particle sizes from large to small on the surface of the macroporous support, and each layer of ceramic membranes must be sintered, so the preparation cycle is long and energy consumption is high. Higher, the bonding force between the film layers is poor

Method used

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  • A kind of preparation method of ceramic composite membrane
  • A kind of preparation method of ceramic composite membrane

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preparation example Construction

[0010] Such as figure 1 Shown, the present invention is a kind of preparation method of ceramic composite membrane, and its steps are:

[0011] (1) Select metal particles with a particle size of 1 / 2-2 / 3 of the average surface pore size of the porous ceramic support (such as: Ti, Al and other metals), based on the quality of the solvent or water used, 0.05% by weight -20% is added to organic solvent or water, and based on the quality of solvent or water, 0.1%-5% dispersant and 1%-5% thickener are added in sequence to prepare a uniformly dispersed, Stable suspension of metal particles;

[0012] (2) Immerse the cleaned porous ceramic support in the slurry prepared in step (1), and use negative pressure to absorb the metal particles in the slurry in the pores on the surface of the porous ceramic support; The negative pressure is 0.01-0.1MPa, and the soaking time is 10-300s. After soaking, wash off the excess metal particles attached to the surface;

[0013] (3) Put the support ...

Embodiment 1

[0021] Example 1: Porous α-Al 2 o 3 Sheet-like ceramics are used as supports with a pore size of 3 μm.

[0022] (1) Slurry preparation: using water as the solvent, based on the solvent quality, add 1.9 μm Ti particles, polyethyleneimine, ethyl cellulose and carboxymethyl at 2%, 0.5% and 1% by mass respectively A mixture of ethyl cellulose sodium (1:1wt), in which polyethyleneimine is a dispersant, and a mixture of ethyl cellulose and sodium carboxymethylcellulose (1:1wt) is a thickener;

[0023] (2) Pore filling: Put the cleaned porous ceramic support into the slurry configured in step (1) and draw negative pressure for slurry soaking adsorption. The negative pressure is 0.03Mpa, and the soaking time is 100s. More metal particles will be adsorbed in the pores of the porous ceramic support body, and excess metal particles attached to the surface of the support body will be removed after soaking.

[0024] (3) In-situ oxidation: put the component prepared in step (2) into oxyg...

Embodiment 2

[0025] Example 2: Porous α-Al 2 o 3 Sheet-like ceramics are used as supports with a pore size of 8 μm.

[0026] (1) Slurry preparation: use isopropanol as solvent, based on solvent mass, add 5.3 μm Ti particles, hexadecyl trimethyl quaternary ammonium salt with mass percentage of 10%, 2% and 3% respectively , a mixture of ethyl cellulose and sodium carboxymethyl cellulose (1:1wt), in which hexadecyltrimethyl quaternary ammonium salt is a dispersant, a mixture of ethyl cellulose and carboxymethyl cellulose (1:1wt) as a thickener;

[0027] (2) Pore filling: Put the cleaned porous ceramic support into the slurry configured in step (1) and draw negative pressure for slurry soaking adsorption. The negative pressure is 0.05Mpa, and the soaking time is 100s. More metal particles will be adsorbed in the pores of the porous ceramic support body, and excess metal particles attached to the surface of the support body will be removed after soaking.

[0028] (3) In-situ oxidation: put ...

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Abstract

A preparation method of a ceramic composite membrane comprises: adding metal powder having particle size that is 1 / 2-2 / 3 of surface average particle size of a support into an organic solvent or water, adding a dispersant and a thickener to prepare stable evenly-dispersed metal particle suspension, adding the porous ceramic support into the metal particle suspension, and performing vacuum dipping adsorption such hat metal particles may enter surface ducts of the ceramic support to fill the surface ducts of the ceramic support; finally, washing the surface of the modified ceramic support, fixing in a protective sleeve made with high-temperature-resistant antioxidant material, placing in an oxygen-bearing atmosphere, and sintering such that the metal particles are oxidized in situ in the ducts of the ceramic support to generate mixed ceramic film containing metal oxides.

Description

technical field [0001] The invention relates to the preparation technology of a ceramic composite membrane. Background technique [0002] Due to its small footprint, high separation efficiency, and no pollution to the environment, membranes are widely used in chemical, biological, pharmaceutical, energy, environment, metallurgy and other fields. Ceramic membranes are also widely used because of their uniform pore size distribution, high mechanical strength, good acid and alkali resistance and corrosion resistance. The preparation of traditional nanofiltration membranes requires repeated preparation of multilayer ceramic membranes with particle sizes from large to small on the surface of the macroporous support, and each layer of ceramic membranes must be sintered, so the preparation cycle is long and energy consumption is high. Higher, the bonding force between the film layers is poor. The invention has simple process, low energy consumption, and disperses the nano-membran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/12
CPCB01D67/0039B01D67/0041B01D69/12B01D71/024
Inventor 张栋强杨平李贵贤
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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