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Method for preparing membrane material by using activated aluminum oxide

A technology of activated alumina and membrane materials, applied in the field of membrane materials, can solve the problems of affecting the application, difficult to process and form, and the inorganic membrane is inelastic, and achieve the effects of improving wettability, lowering melting point, and improving toughness

Pending Publication Date: 2021-12-24
江西嘉陶无机材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of inorganic separation membranes determine that it has a wide range of application prospects in industry, but at the same time inorganic separation membranes also have their own shortcomings, which affect the current application
Inorganic membranes are generally inelastic, brittle, and difficult to process

Method used

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  • Method for preparing membrane material by using activated aluminum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 80 parts of pseudoboehmite, 7 parts of titanium oxide micropowder, 2 parts of tourmaline powder, part of nano-magnesia and 9 parts of kaolin according to parts by weight, wherein the powder particles are all controlled between 0.1-0.5 μm, add water Make a slurry, add 4% rare earth material (yttrium oxide) accounting for the mass of the slurry, mix evenly, continue to add organic additives accounting for 5% of the mass of the slurry, and fully stir for 24 hours to prepare a mixed slurry, and coat the mixed slurry covered on the support body and sintered to obtain an inorganic membrane.

[0023] The sintering conditions are as follows: in a vacuum and nitrogen atmosphere, heat up to 900°C at a rate of 0.5°C / min, and keep it warm for 5h; , kept at 350°C for 5h, and then cooled with the furnace.

[0024] The organic additive includes a mixture of vermiculite and water-absorbing resin in a mass ratio of 1:0.5.

Embodiment 2

[0026] According to parts by weight, 85 parts of pseudoboehmite, 4 parts of titanium oxide micropowder, 3 parts of tourmaline powder, 1 part of nano-magnesia and 11 parts of kaolin were mixed evenly, and the powder particles were all controlled between 0.1-0.5 μm. Add water to make a slurry, add 3% rare earth material (yttrium oxide) accounting for the mass of the slurry, mix evenly, continue to add organic additives accounting for 6% of the mass of the slurry, and fully stir for 24 hours to prepare a mixed slurry. The mixed slurry It is coated on a support body and sintered to obtain an inorganic membrane.

[0027] The sintering conditions are as follows: in a vacuum and nitrogen atmosphere, heat up to 850°C at a rate of 0.6°C / min, and keep warm for 5h; , kept at 350°C for 5h, then cooled with the furnace;

[0028] The organic additive includes a mixture of vermiculite and water-absorbing resin in a mass ratio of 3:1.

Embodiment 3

[0030] According to parts by weight, 87 parts of pseudoboehmite, 8 parts of titanium oxide micropowder, 3 parts of tourmaline powder, 5 parts of nano-magnesia and 5 parts of kaolin were uniformly mixed, and the powder particles were all controlled between 0.1-0.5 μm. Add water to make a slurry, add 3% rare earth material (yttrium oxide) accounting for the mass of the slurry, mix evenly, continue to add organic additives accounting for 4% of the mass of the slurry, and fully stir for 24 hours to prepare a mixed slurry. It is coated on a support body and sintered to obtain an inorganic membrane.

[0031] The sintering conditions are as follows: in a vacuum and nitrogen atmosphere, heat up to 900°C at a rate of 1°C / min, and keep warm for 4h; , kept at 350°C for 5h, and then cooled with the furnace.

[0032] The organic additive includes a mixture of vermiculite and water-absorbing resin in a mass ratio of 1:0.5.

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Abstract

The invention discloses a method for preparing a membrane material by using activated aluminum oxide, and relates to the field of membrane materials. The method comprises the following steps: adding water into pseudo-boehmite, titanium oxide micro powder, tourmaline powder, nano magnesium oxide and kaolin to prepare slurry, adding a rare earth material, uniformly conducting mixing, continuously adding an organic additive to prepare mixed slurry, coating a support body with the mixed slurry, and conducting sintering at a low temperature to prepare the inorganic membrane. The rare earth material is added, and oxide in the rare earth material is a good surface active substance, so that wettability among inorganic particles can be improved, a low-melting-point liquid phase is easy to form, the melting point of the material is reduced, and sintering at low temperature is realized.

Description

technical field [0001] The invention relates to the field of membrane materials, in particular to a method for preparing membrane materials by using activated alumina. Background technique [0002] As we all know, membrane separation saves energy compared with traditional separation methods such as distillation because it does not require phase change during separation. As one of the two major separation membranes, inorganic membranes are attracting more and more attention. Inorganic membranes can be divided into metal membranes, glass membranes, carbon membranes, and ceramic membranes according to membrane materials. Among them, ceramic membranes mainly include alumina membranes and zirconia membranes, which are known for their good thermal stability and are widely used. [0003] Ceramic membrane has the following advantages: (1) High temperature resistance. The practical temperature of the inorganic separation membrane can be higher than 400°C, and some can even reach 800...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30B01J20/26
CPCB01J20/12B01J20/08B01J20/06B01J20/041B01J20/0207B01J20/26
Inventor 程春明杨涛王愉黄浩
Owner 江西嘉陶无机材料有限公司
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