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A kind of preparation method of acid and alkali resistant ceramic separation membrane support body

A technology of ceramic separation membrane and support body, applied in ceramic products, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of intolerance, high cost, low flux of ceramic membrane support body, etc. The effect of lowering, lowering the sintering temperature, and reducing the cost

Active Publication Date: 2020-07-28
海加尔(厦门)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to improve the existing ceramic separation membrane support body production technology, low-temperature sintered ceramic membrane support body flux is low, not resistant to long-term strong acid, strong alkali corrosion; high-performance ceramic separation membrane support body sintering temperature High, costly problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Slowly add 100g of α-alumina with a D50 of 22 microns, 2g of aluminum chloride, and 4g of zirconium oxychloride into 1000g of pure water, stir to form a suspension solution, raise the temperature to 85°C; adjust the pH value to 9 with 5% ammonia water, and stir And keep the temperature for 2 hours; then slowly add 5% nitric acid solution to make the pH drop to 1.5 and keep stirring for 10 hours; then pour the suspension into the container, filter with filter paper, wash with 100g of ethanol, and then wash with 200g of water. Pour the cleaned powder into a hydrothermal reaction kettle, add 400g of water, add 2g of polyethylene glycol 2000, stir evenly, seal the hydrothermal reaction kettle and raise the temperature to 220°C, and keep it warm for 10 hours. The suspension was taken out and filtered and dried. Add 5g of methyl cellulose to the dried powder, 10g of 5% polyvinyl alcohol aqueous solution, 15g of water, 6g of tung oil, mix and stir, extrude into a green body of...

Embodiment 2

[0022] Slowly add 100g of α-alumina with a D50 of 30 microns, 5g of aluminum chloride, and 4g of zirconium oxalate into 1000g of pure water, stir to form a suspension solution, and raise the temperature to 85°C; adjust the pH value to 10 with 8% ammonia water, stir and keep temperature for 4 hours; then slowly add 10% concentration of nitric acid solution to reduce the pH to 1 and keep stirring for 5 hours; then pour the suspension into a container, filter it with filter paper, and wash it with 100g ethanol, then wash it with 200g water, and wash it The final powder was poured into a hydrothermal reaction kettle, 400g of water was added, 3g of polyethylene glycol 6000 was added, and after stirring evenly, the hydrothermal reaction kettle was sealed and heated to 240°C, and kept for 10 hours. The suspension was taken out and filtered and dried. Add 6g of methylcellulose to the dried powder, 10g of 10% polyvinyl alcohol aqueous solution, 16g of water, 4g of tung oil, and 4g of l...

Embodiment 3

[0024]Slowly add 100g of α-alumina with a D50 of 60 microns and 10g of aluminum chloride into 1000g of pure water, stir to form a suspension solution, and raise the temperature to 85°C; adjust the pH value to 10 with 2% ammonia water, stir and maintain the temperature for 4 hours; Slowly add 3% nitric acid solution to lower the pH to 1 and keep stirring for 10 hours; then pour the suspension into a container, filter it with filter paper, wash it with 100g of ethanol, and then wash it with 200g of water. Pour into the hydrothermal reaction kettle, add 400g of water, add 10g of polyethylene glycol 1000, stir evenly, seal the hydrothermal reaction kettle and raise the temperature to 200°C, and keep it warm for 8 hours. The suspension was taken out and filtered and dried. Add 2g of titanium oxide with a D50 of 2 microns, 8g of methylcellulose, 10g of 10% polyvinyl alcohol aqueous solution, 18g of water, and 8g of liquid paraffin to the dried powder, mix and stir, and extrude throu...

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Abstract

The invention discloses a preparation method of a ceramic separation membrane support capable of resisting corrosion of strong acid and strong alkali for a long time. The method is characterized by comprising the steps of (1) mixing alpha aluminium oxide powder with a median particle diameter of 15-60 micrometers and an aluminium salt or a mixture of an aluminium salt and a zircon salt, adding an obtained mixture into water, and stirring an obtained solution to form a suspension solution, wherein the weight of the aluminium salt or the mixture of the aluminium salt and the zircon salt accounts for 2-10% of that of the aluminium oxide powder; (2) preparing a mixture of aluminium and alpha aluminium oxide or a mixture of mixed sol of aluminium and zircon and the alpha aluminium oxide by adopting a sol-gel method, and after cleaning is conducted, carrying out a hydrothermal reaction at 200-240 DEG C to make the aluminium or the sol of the aluminium and the zircon on the surfaces of the alpha aluminium oxide transformed into nanometer oxide crystal particles; and (3) forming pug from the alpha aluminium oxide particles which wrap a nanometer oxide, a binder, titanium oxide and water, and conducting extrusion, drying and 1300-1500-DEG C sintering to form the ceramic separation membrane support. The support is high in porosity, and can resist corrosion of the strong acid and the strong alkali for a long time.

Description

technical field [0001] The invention relates to a preparation method of an acid and alkali-resistant ceramic separation membrane support body, belonging to the field of porous ceramic preparation. Background technique [0002] Ceramic separation membrane elements are important components of precision filtration and separation technology in the industrial field. At present, it is mainly used in the refining of brine in the chlor-alkali industry, the filtration of amino acid fermentation liquid, the clarification and filtration of plant extracts, the treatment of oily wastewater, and the treatment of chemical wastewater containing organic solvents and high suspended solids. However, ceramic membranes have almost no industrial applications in the broader market, such as reclaimed water reuse, industrial sewage treatment, municipal sewage treatment, and tap water purification. Among them, in the treatment of special sewage such as landfill leachate, electroplating wastewater, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B41/85C04B35/10C04B35/622C04B35/64B01D67/00B01D69/10B01D71/02
CPCB01D67/0041B01D69/105B01D71/024B01D71/025C04B35/10C04B35/622C04B35/64C04B38/00C04B41/50C04B41/5016C04B41/85C04B2235/3244
Inventor 林楚潮俞静磊翁志龙
Owner 海加尔(厦门)科技有限公司