Casting tubular reverse osmosis membranes in place
Abstract
Abstract AN OPEN PORE MODULE, OF BONDED RESIN COATED FILLER PARTICLES, HAVING A PLURALITY OF SPACED BORES THERTHROUGH CONTAINING REVERSE OSMOSIS, MEMBRANES, IS MADE BY (1) PLACING THE MODULE IN A STATIONARY VERTICAL POSITION, (2) PLACING A VISCOUS CASTING SOLUTION CONTAINING POLYMERIC FILM FORMING MATERIAL, A SOLVENT AND A LEACHABLE SWELLING AGENT INTO EACH OF THE BORES, (3) GRAVITY DROPPING A CASTING BOB, HAVING A CIRCULAR CROSS-SECTION A ITS WIDEST POINT WITH AN OUTSIDE DIAMETER BETWEEN 0.02 AND 0.12 INCH LESS THAN THE INSIDE DIAMETER OF THE MODULE BORES, AT A SPEED LESS THAN 1 INCH/SEC. DOWN THROUGH EACH BORE TO FORM A CONTINUOUS FILM OF CASTING SOLUTION ON THE INSIDE OF EACH BORE, (4) EXPOSING THE FILM TO AIR AND THEN (5) CONTACTING THE FILM WITH A LEACHING LIQUID TO FORM A REVERSE OSMOSIS MEMBRANE ON THE INSIDE OF EACH MODULE BORE.
Inventors
- 👤 Regis R Stana
- 👤 Andrew S Calderwood
Bibliographic Details
Claims Analysis
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