Liquid purification or separation – Filter – Material
Patent
1990-10-25
1992-05-05
Dawson, Robert A.
Liquid purification or separation
Filter
Material
21050025, 21050026, 210504, 210506, 2105101, 264 455, 264 48, 264 60, B01D 3321
Patent
active
051104709
ABSTRACT:
A ceramic filter having good permeability and a superior durability, and a process for manufacturing the same. This filter comprises a porous support made of a ceramic, a fine intermediate layer formed on one surface of said support and comprised of at least one kind of particles selected from particles of SnO.sub.2, TiO.sub.2, ZrO.sub.2 or CeO.sub.2 and having a particle diameter of not more than 500 .ANG., and a thin film formed on the surface of said fine intermediate layer and comprised of at least one particles selected from particles of SnO.sub.2, TiO.sub.2, ZrO.sub.2 or CeO.sub.2 and having a particle diameter of not more than 300 .ANG. and smaller than the particle diameter of the particles that constitute said fine intermediate layer.
REFERENCES:
patent: 4981590 (1991-01-01), Vanitveem et al.
patent: 4983423 (1991-01-01), Goldsmith
Wajima Naohito
Yokosawa Kiyoshi
Dawson Robert A.
Fortuna Ana
Rose Howard L.
Toto Ltd.
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