Preparation method of high-purity alumina plate ceramic membrane support

A technology of ceramic membrane support and high-purity alumina, which is applied in the field of ceramics, can solve the problems of inability to be used stably for a long time, low alumina content, and low surface finish, and achieve uniform size, good effect, and high surface finish.

Active Publication Date: 2016-10-12
上海硅苑膜科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum oxide content of the existing flat ceramic membrane support is not high, resulting in the inability to use it stably for a long time in a strong acid and strong alkali system, and the surface finish of the existing flat ceramic membrane support is not high, resulting in excessive coating of the membrane. Thick, affect the use efficiency, etc.

Method used

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  • Preparation method of high-purity alumina plate ceramic membrane support
  • Preparation method of high-purity alumina plate ceramic membrane support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Put 160g of zirconium nitrate into 6.6L of deionized water, heat and stir, slowly add 10g of oxalic acid at 90°C, stop heating after 36 hours at constant temperature, keep stirring and cool to room temperature, and set aside;

[0035] 2) Add alumina a, whose D50 is: 20 μm-35 μm; alumina b, whose D50 is: 2 μm-5 μm; lanthanum oxide, yttrium oxide and other inorganic powders in proportion 27500g:4510g:110g:49.5g into the kneader Mix for 1 hour;

[0036] 3) Add the mixed solution obtained in step 1) to the mixture obtained in step 2), and mix thoroughly for 30 minutes;

[0037] 4) Accurately weigh dextrin, PVA, glycerin, tung oil and other organic additives according to the ratio of 2090g:2145g:770g:495g, mix thoroughly, and slowly and evenly add the mixed Good organic additives, mix for 30 minutes;

[0038] 5) Move the kneaded mud into the vacuum mud refining machine, first mix and knead 5 times under the air condition of normal pressure, and then knead the mud 5 time...

Embodiment 2

[0041] 1) Put 130g of zirconium nitrate into 6L of deionized water, heat and stir, slowly add 10g of oxalic acid at 90°C, stop heating after 36 hours at constant temperature, keep stirring and cool to room temperature, and set aside;

[0042] 2) Put alumina a, whose D50 is: 20 μm-35 μm; alumina b, whose D50 is: 2 μm-5 μm, lanthanum oxide, yttrium oxide and other inorganic powders in proportion 25000g:4100g:100g:45g into the kneader and mix 1 hour;

[0043] 3) Add the mixed solution obtained in step 1) to the mixture obtained in step 2), and mix thoroughly for 1 hour;

[0044] 4) Accurately weigh dextrin, PVA, glycerin, tung oil and other organic additives according to the ratio of 1900g:1950g:700g:450g, mix thoroughly, and slowly and evenly add the mixed inorganic powder in the kneader Good organic additives, mix for 30 minutes;

[0045] 5) Move the kneaded mud into the vacuum mud refining machine, first mix and knead 5 times under the air condition of normal air pressure, a...

Embodiment 3

[0048] 1) Put 100g of zirconium nitrate into 5.4L of deionized water, heat and stir, slowly add 10g of oxalic acid at 90°C, stop heating after 36 hours at constant temperature, keep stirring and cool to room temperature, and set aside;

[0049] 2) Add alumina a, whose D50 is: 20 μm-35 μm; alumina b, whose D50 is: 2 μm-5 μm; lanthanum oxide; Mix in the machine for 1 hour;

[0050] 3) Add the mixed solution obtained in step 1) to the mixture obtained in step 2), and mix thoroughly for 30 minutes;

[0051] 4) Accurately weigh dextrin, PVA, glycerin, tung oil and other organic additives according to the ratio of 1710g:1755g:630g:405g, mix thoroughly, and slowly and evenly add the mixed Good organic additives, mix for 30 minutes;

[0052] 5) Move the kneaded mud into the vacuum mud refining machine, first mix and knead 5 times under the air condition of normal pressure, and then knead the mud 5 times under the vacuum of 0.10MPa, then put it into the extruder, and pass the special...

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Abstract

The invention provides a preparation method of a high-purity alumina plate ceramic membrane support. The preparation method comprises steps as follows: step one, zirconium nitrate is put into deionized water and is heated and stirred; step two, powder of alumina a, alumina b, lanthanum oxide and yttrium oxide is added to a kneading machine proportionally for mixing; step three, mixtures obtained in the step one and the step two are mixed; step four, dextrin, PVA (polyvinyl acetate), glycerin and tung oil are weighed proportionally and mixed sufficiently, a mixture is added to a material obtained in the step three for mixing, and a pug material is obtained; step five, the pug material is transferred to a pug mill and subjected to pugging and then is fed into an extruder, and an extruded blank is air-dried naturally; step six, the blank is placed into an oven for drying and then is placed in a kiln for sintering. The alumina content of the plate ceramic membrane support prepared with the method is 99% or higher, and while the anti-corrosion strength of the support is greatly improved and the service life of a ceramic membrane is greatly prolonged, long-term stable usage of the ceramic membrane under a strong alkali system can be guaranteed.

Description

technical field [0001] The invention relates to a preparation method of a high-purity alumina flat ceramic membrane support body, belonging to the field of ceramics. Background technique [0002] Membrane separation technology originated in the early 20th century and has been widely used in food, medicine, biology, environmental protection, chemical industry, metallurgy, energy, petroleum, water treatment and many other fields since the 1960s, and has become one of the most important separation methods . From the shape, the membrane is mainly divided into: flat membrane, tubular membrane, hollow fiber membrane, roll membrane and so on. [0003] At present, the flat membranes used in the water treatment field are mainly made of organic materials, most of which are polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), etc., but the poor oxidation resistance and hydrophilicity of organic membranes lead to low separation efficiency. The short lifespan limits its scope of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B38/0041C04B38/0054C04B2235/3225C04B2235/3227C04B2235/443C04B2235/96
Inventor 张伟杨东亮樊震坤张超王磊孟凡鹏张健李泉
Owner 上海硅苑膜科技有限公司
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