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Ceramic filter

A ceramic filter, ceramic technology, applied in the direction of ceramic products, chemical instruments and methods, membranes, etc., to achieve the effect of reducing the amount of use, preventing the increase of pressure loss, and inhibiting infiltration

Active Publication Date: 2009-01-21
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this molecular sieve carbon membrane, there are a large number of pores with a pore diameter of 1nm or less, so only components with a specific molecular diameter can be separated and purified from various mixed gases with different molecular diameters.

Method used

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Examples

Experimental program
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Embodiment

[0032] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

[0033] Examples and Comparative Examples

[0034] As described below, a substrate A formed of a monolithic alumina porous substrate, a substrate B on which a first surface dense layer is formed on the substrate A, and a substrate B on which a second surface dense layer is formed Substrate C, substrate D on which the third surface dense layer is formed. In addition, a substrate E similar to the substrate D, which is a cylindrical alumina porous substrate, was formed. Using these substrates A to E, a carbon film layer was formed on the surface of each of the substrates A to E.

[0035] In addition, each base material A-E is demonstrated in detail. The substrate A is a monolithic alumina porous substrate with an average particle diameter of 10 to 100 μm and an average pore diameter of 1 to 30 μm. Substrate B is formed by d...

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Abstract

Disclosed is a ceramic filter formed on a porous substrate and having good permeability and good selectivity. The ceramic filter comprises a monolith-type alumina porous substrate (2) having an average pore size of 1 to 30 [mu]m, a first surface dense layer (3) having an average pore size of 0.1 to 3 [mu]m and provided on the substrate (2), a second surface dense layer (4) having an average pore size of 0.01 to 0.5 [mu]m and provided on the first surface dense layer (3), a third surface dense layer (5) formed with a titania sol, having an average pore size of 0.3 to 20 nm and provided on the second surface dense layer (4), and a carbon membrane layer (6) which is a molecular sieve carbon membrane and provided on the third surface dense layer (5).

Description

technical field [0001] The present invention relates to ceramic filters used in the separation of various mixtures Background technique [0002] From the viewpoint of the environment and energy saving, the development of separation membranes for filtering and separating specific gases and the like from mixtures of various gases and the like has been carried out. As such separation membranes, polymer membranes such as polysulfone membranes, silicon membranes, polyamide membranes, and polyimide membranes are known, but there are problems with heat resistance and chemical resistance, for example, when the mixture contains an organic solvent , the film will deteriorate and deteriorate. [0003] On the other hand, examples of separation membranes having good heat resistance and chemical stability include carbon membranes, and separation membranes in which a carbon membrane is formed on a porous substrate are known. For example, Patent Document 1 discloses a molecular sieve carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02C04B38/00B01D61/36
CPCC04B2111/00405B01D69/12B01D2325/022B01D63/066C04B2111/00801C04B35/10B01D71/021C04B38/0032B01D67/0067C04B35/52B01D2325/20B01D2325/02
Inventor 市川明昌富田俊弘
Owner NGK INSULATORS LTD
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