Liquid purification or separation – Casing divided by membrane into sections having inlet – Membrane movement during purification
Patent
1992-08-26
1994-01-04
Sever, Frank
Liquid purification or separation
Casing divided by membrane into sections having inlet
Membrane movement during purification
21032175, 21032184, 210331, 21050021, 210506, B01D 6316
Patent
active
052757250
ABSTRACT:
The present invention provides a flat separation membrane leaf, which is characterized by consisting of a flat membrane support comprising an inner layer having a coarse structure and surface layers comprising a nonwoven fabrics having a dense structure, wherein the surface layers are integrated with the inner layer interposed between them, and semipermeable membranes covering both sides of the support in such a manner that the semipermeable membranes penetrates into the openings of the nonwoven fabrics of the surfaces of the support to combine the semipermeable membranes with the surfaces of the support. The invention provides also a flat separation membrane element which comprises, as the essential component, the above-described flat separation membrane leaf.
REFERENCES:
patent: 4894155 (1990-01-01), Leoncavallo et al.
Ishii Kiyoshi
Matsumoto Yoshitada
Daicel Chemical Industries Ltd.
Sever Frank
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