Liquid purification or separation – Casing divided by membrane into sections having inlet – Energy recovery from treated liquid
Patent
1982-07-22
1983-10-25
Spear, Jr., Frank A.
Liquid purification or separation
Casing divided by membrane into sections having inlet
Energy recovery from treated liquid
2104332, B01D 3100
Patent
active
044117876
ABSTRACT:
A reverse osmosis module in which the semipermeable membrane comprising a microporous support reinforced on one side thereof with a backing material and the other side thereof having deposited thereon an ultra-thin film formed by cross-linking polyethyleneimine with a cross-linking agent such as isophthaloyl chloride and the backing for the membrane sandwich comprising a film of a polyethylene-terephthalate positioned between two layers of an epoxy-impregnated polyester may be utilized to concentrate or dewater aqueous solutions at elevated temperatures and pressures. The module may be used at temperatures ranging from about 50.degree. to about 95.degree. C. and pressures ranging from 400 to about 1200 psi to dewater aqueous sugar solutions, salt solutions, starch solutions, etc.
REFERENCES:
patent: 3228876 (1966-01-01), Mahon
patent: 3813334 (1974-05-01), Bray
Spear, Jr. Frank A.
UOP Inc.
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