Preparation method of alumina hollow fibre membrane containing inorganic additive

A technology of inorganic additives and organic additives, applied in the field of ceramic membranes, can solve the problems of high cost of alumina hollow fiber membranes, application limitations of alumina hollow fiber membranes, cost of multiple raw materials and energy consumption, etc. The effect of high density and uniform pore size distribution

Active Publication Date: 2012-01-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relatively high price and sintering temperature of alumina require more raw material costs and energy consumption, which is one of the reasons for the high cost of alumina hollow fiber membranes
Therefore, the application of alumina hollow fiber membranes in industrial production is limited to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Preparation of organic solution

[0034] Dissolve 1.5g of polyvinylpyrrolidone (PVP) in 133.5g of 1-methyl-2-pyrrolidone (NMP), add 15g of polyethersulfone (PES), and stir evenly to obtain an organic solution;

[0035] 2) Preparation of organic solution-inorganic particle system

[0036] Under rapid stirring conditions, 15 g of silicon dioxide (SiO2) with an average particle size of about 0.02 μm 2 ) was slowly added to the organic solution prepared in item 1), and dispersed evenly; then 135g of Al with an average particle size of about 0.15 μm was added 2 o 3 particles. After fully stirring for 48 hours, a uniform organic solution-inorganic particle system is obtained, that is, the casting solution;

[0037] 3) Preparation of alumina hollow fiber body containing inorganic additives

[0038] The casting solution obtained in item 2) is vacuum degassed for 1 to 2 hours, and the vacuum degree is kept at 0.05MPa. After degassing, it is extruded with 0.2 to 0.3MPa ni...

Embodiment 2

[0046] The mass percent of each component in the casting liquid is:

[0047] Organic additive:polymer:solvent:inorganic additive:alumina=1.5g:150g:112.5g:15g:150g.

[0048] The organic additive is commercially available polyvinylpyrrolidone (PVP); the polymer is commercially available polyethersulfone (PES); the solvent is commercially available 1-methyl-2-pyrrolidone (NMP); the inorganic additive is commercially available metal Aluminum powder (Al), with an average particle size of about 1 μm; alumina is commercially available Al with an average particle size of about 0.15 μm 2 o 3 particles.

[0049] During the preparation process, the core liquid was self-made deionized water; the outer gel bath was self-made deionized water; the inner diameter of the spinneret was set to 1.5 mm, and the outer diameter was set to 2.5 mm.

[0050] Finally, Al with good properties can be obtained 2 o 3 hollow fiber membranes.

[0051] All the other are with embodiment 1.

Embodiment 3

[0053] The mass percent of each component in the casting liquid is:

[0054] Organic additive:polymer:solvent:inorganic additive:alumina=1.5g:150g:133.5g:75g:75g.

[0055] The organic additive is commercially available polyvinylpyrrolidone (PVP); the polymer is commercially available polyethersulfone (PES); the solvent is commercially available 1-methyl-2-pyrrolidone (NMP); the inorganic additive is commercially available kaolin , with an average particle size of 1.5-3 μm; alumina is commercially available Al with an average particle size of about 0.15 μm 2 o 3 particles.

[0056] During the preparation process, the core liquid was self-made deionized water; the outer gel bath was self-made deionized water; the inner diameter of the spinneret was set to 1.5 mm, and the outer diameter was set to 2.5 mm.

[0057] Finally, kaolin-Al with good properties can be obtained 2 o 3 Hollow fiber membrane with a porosity of about 40% and a membrane density of 1.3×10 6 g·m -3 About,...

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Abstract

The invention relates to a preparation method of an alumina hollow fibre membrane containing an inorganic additive, which comprises the following four steps of: preparing an organic solution; preparing an organic solution-inorganic granule system; preparing an alumina hollow fibre blank body containing the inorganic additive; and preparing the alumina hollow fibre membrane containing the inorganic additive, wherein a film casting solution contains the inorganic additive; and the inorganic additive is a mixture containing one or more than two of aluminium metal powder, silica, titanium dioxide, zirconium dioxide, kaolin, montmorillonoid, kieselguhr, talc and silicate. The preparation method disclosed by the invention has the advantages that: the technology is mature, the process is simpler, equipment and technology cost is saved, the alumina content and the sintering temperature are reduced, the cost of the alumina hollow fibre membrane is reduced, and the characteristics of high packing density, high strength, uniformity of pore size distribution, and the like are achieved; and viewed from two aspects of material cost and energy consumption, the cost of the alumina hollow fibre membrane is greatly reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of ceramic membranes, in particular to a method for preparing alumina hollow fiber membranes containing inorganic additives. 【Background technique】 [0002] In recent years, as a new, efficient and energy-saving technology, membrane separation has been widely used in the fields of food industry, pharmaceutical and biological engineering, petrochemical and environmental protection industries. Inorganic membrane is a kind of solid separation membrane, which is made of metal, metal oxide, ceramic, porous glass, zeolite, inorganic polymer material, etc. In industrial applications, inorganic membranes have many advantages: (1) Good thermal stability, that is, when the inorganic membrane is used at a high temperature of 400-1000 ° C, it can still maintain its performance. This makes the use of membrane separation technology for high-temperature gas separation Purification has practicality; (2) stable chemical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/08
Inventor 许振良韩灵凤魏永明曹悦程亮
Owner EAST CHINA UNIV OF SCI & TECH
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