Porous ceramic filter and process of producing the same

Details Porous ceramic filter and process of producing the same Porous ceramic filter and process of producing the same

1986-04-16

1988-05-24

Bell, Mark L.

Gas separation

Two or more separators

Plies or layers of different characteristics or orientation

55523, 55524, 501 80, B01D 5000

Patent

active

047463414

ABSTRACT:
A porous ceramic filter consisting of a planar porous support formed of a ceramic material, and a filtering layer formed of a fired mass of a ceramic powder integrally deposited on an upper surface of the porous ceramic support. A particle size of the ceramic powder, and a size of macro pores formed in the fired mass of said ceramic powder, decrease substantially continuously in a direction from the upper surface of the ceramic support toward an exposed surface of the filtering layer. The porous ceramic filter is produced by a process including preparing a suspension containing a ceramic powder of a predetermined particle size distribution; holding the porous support stationary such that the upper surface extends substantially horizontally, and is in contact with the suspension, until particles of the ceramic powder are sedimented by gravity and thereby deposited on the upper surface of the porous support, as an unfired layer for the filtering layer; removing aqueous components from said porous ceramic support and the unfired layer of the deposited particles; and firing the porous ceramic support and the unfired layer to produce the porous ceramic layer.

REFERENCES:
patent: 4356215 (1982-10-01), Auriol et al.
patent: 4629483 (1980-12-01), Stanton

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