Liquid purification or separation – Filter – Material
Patent
1989-12-18
1990-11-20
Sever, Frank
Liquid purification or separation
Filter
Material
55158, B01D 6118
Patent
active
049716964
ABSTRACT:
A multilayer inorganic porous membrane consisting of a monolayer or multilayer porous support having at least one surface integrally formed thereon with a porous thin layer having an average pore size less than that of the porous support, wherein a maximum pore size in the support surface is defined to be from 1 to 250 times an average pore size of the thin layer. The multilayer porous membrane is superior in preventing the occurrence of pin holes and cracks therein thereby enhancing precision of the filtration and separation.
Abe Fumio
Mori Hiroshi
Takagi Shigekazu
NGK Insulators Ltd.
Sever Frank
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