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Method for drying separation membrane and method for producing separation membrane structure

A drying method and separation membrane technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve problems such as clogging of pores, and achieve the effect of simple and rapid drying

Inactive Publication Date: 2019-06-14
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the pores of the above-mentioned separation membrane are fine, for example, when the separation membrane is stored or assembled in a housing, the pores are easily clogged due to the adsorption of moisture in the air.

Method used

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  • Method for drying separation membrane and method for producing separation membrane structure
  • Method for drying separation membrane and method for producing separation membrane structure
  • Method for drying separation membrane and method for producing separation membrane structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0077] (Sample No.1~5)

[0078] First, add 30% by volume of an inorganic binder to 70% by volume of alumina particles (aggregate) with an average particle diameter of 12 μm, and then add a molding aid such as an organic binder and a pore-forming agent, and perform dry mixing Thereafter, water and a surfactant were added, mixed and kneaded, thereby preparing kneaded clay. As an inorganic binder, talc, kaolin, feldspar, clay, etc. with an average particle size of 1 to 5 μm are used to make SiO 2 (70% by mass), Al 2 o 3 (16% by mass), an alkaline earth metal and an alkali metal (11% by mass).

[0079] Next, the kneaded clay is extruded to produce a molded body of the monolithic porous base material. Then, the molded body of the porous substrate was fired (1250°C, 1 hour) to obtain an alumina matrix having a plurality of cells.

[0080] Next, PVA (organic binder) was added to the alumina powder to prepare a slurry, which was used to form a molded body of an intermediate layer...

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Abstract

This method for drying a separation membrane (12) comprises a step wherein a gas for drying is supplied to the separation membrane at such a rate that the value obtained by dividing the difference between the maximum value and the minimum value of the flow rate of the gas for drying on the membrane surface of the separation membrane (12) by the minimum value of the flow rate is 15% or less. The gas for drying is a gas at a temperature of 40 DEG C or less, which contains a water-soluble gas that has a solubility in 1 cm3 of water of 0.5 cm3 or more at 40 DEG C at 1 atmosphere.

Description

technical field [0001] The present invention relates to a method for drying a separation membrane and a method for producing a separation membrane structure. Background technique [0002] Conventionally, separation membranes have been practically used in various fields such as the chemical industry, the electronic industry, and the pharmaceutical industry. As the gas separation membrane, a zeolite membrane, a silica membrane, a carbon membrane, a polymer membrane, and the like are used depending on the size of gas molecules to be separated. [0003] Since the pores of the separation membrane are fine, for example, when the separation membrane is stored or assembled in a case, the pores are easily clogged due to the adsorption of moisture in the air. If the pores are clogged, gas permeation is inhibited, and membrane performance cannot be fully exhibited. Therefore, the separation membrane must be dried after assembly. [0004] As the drying method of the separation membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00
CPCB01D67/00B01D2311/103B01D2311/16B01D2311/14B01D2311/04B01D69/108B01D67/0095
Inventor 野田宪一萩尾健史
Owner NGK INSULATORS LTD
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