Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of manufacturing ceramic porous membrane and method of manufacturing ceramic filter

A technology of ceramic filter and manufacturing method, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problem of many times of membrane formation, etc., and achieve the effect of high average pore size

Inactive Publication Date: 2009-09-09
NGK INSULATORS LTD
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dip coating method can be used for monolithic substrates, it requires many times of film formation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of manufacturing ceramic porous membrane and method of manufacturing ceramic filter
  • Method of manufacturing ceramic porous membrane and method of manufacturing ceramic filter
  • Method of manufacturing ceramic porous membrane and method of manufacturing ceramic filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0048] (1) Porous matrix member

[0049] A monolithic (outer diameter: 30 mm, cell inner diameter: 3 mm x 37 cells, length: 65-1000 mm) material with a UF membrane is used as the base member, wherein the average pore diameter of the UF membrane is 0.5-30 nm. It should be noted that both ends of the member are partially closed by glass.

[0050] (2) Ceramic sol solution

[0051] In the presence of nitric acid and under the condition of 5-100°C, the metal alkyl oxide is hydrolyzed for 1-12 hours to obtain various silica sols, titania sols and zirconia sols. The obtained sol liquid is diluted with water or alcohol to obtain a coating liquid. In order to manufacture silica sol, tetraethoxysilane was hydrolyzed at 50°C for 5 hours in the presence of nitric acid to obtain a sol solution, and then the sol solution was diluted with water or ethanol and adjusted to 0.1 to 2.0 wt% concentration.

[0052] (3) Film formation

[0053] (a) Liquid injection

[0054] The outer periphera...

Embodiment 1

[0065] Change the film-forming method and drying method of the ceramic porous membrane, and study the film-forming method and drying method. The specific matrix members and ceramic sol are listed in Table 1.

Embodiment 2

[0067] The concentration of the diluted solution of the ceramic sol was changed, and the influence of the diluted solution was studied. The specific matrix components, ceramic sol materials, film forming methods and drying methods are listed in Table 1. When the concentration of ceramic sol is less than 50%, the separation factor α is also less than 50.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

There are disclosed a method of manufacturing a thin and uniform ceramic porous membrane formed with less membrane formation times and having less defects, and a method of manufacturing a ceramic filter including the ceramic porous membrane. A UF membrane (14) having an average pore diameter smaller than that of a porous base member (11) is formed on the porous base member (11), a ceramic sol (40) is deposited on the UF membrane (14), and the ceramic sol (40) is dried with blown air and then fired to form a ceramic porous membrane (1) having an average pore diameter smaller than that of the UF membrane (14).

Description

technical field [0001] The present invention relates to a manufacturing method of a ceramic porous membrane and a manufacturing method of a ceramic filter. More specifically, the present invention relates to a method of manufacturing a thin, uniform, and less-defective ceramic porous membrane, and a method of manufacturing a ceramic filter including the ceramic porous membrane. Background technique [0002] Hitherto, various methods of producing ceramic porous membranes on porous base members have been known. For example, a thermal coating method is known (see Non-Patent Document 1). The method is to apply the sol by rubbing a tubular base member with a cloth containing ceramic sol, thereby forming a porous film on the outer surface of the heated tubular base member. [0003] There is also known a method of forming a porous membrane on the inner surface of a porous base member having a tubular or cylindrical lotus root-like monolith by forming a filtration membrane (see Pa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02C04B41/87
CPCB01D67/0048B01D63/066B01D2323/42
Inventor 矶村学菱木达也和田一朗
Owner NGK INSULATORS LTD