公开(公告)号：US3658955A

公开(公告)日：1972-04-25

申请号：US3658955D

申请日：1970-04-15

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： CHAMBERLIN RICHARD M ,  EMSWILLER JAMES L ,  CALDERWOOD ANDREW S ,  STANA REGIS R

IPC: B01D20060101 ,  B01D69/10 ,  B29C41/04 ,  B29C63/34 ,  B29D20060101 ,  B29D7/00 ,  B29D23/00 ,  C08L1/00 ,  B29C13/00 ,  B29D27/04

CPC classification number: B01D69/04 ,  B01D67/0013 ,  B01D69/10 ,  B01D71/16 ,  B01D71/22 ,  B01D2323/16 ,  B01D2323/42

Abstract: A UNITARY, TUBLAR REVERSE OSMOSIS MEMBRANE IS MADE BY PLACING A VISCOUS CASTING SOLUTION CONTAINING A CELLULOSIC FILM FORMING MATERIAL, A SOLVENT, AND A LEACHABLE SWELLING AGENT INTO A HOLLOW TUBE, PLACING A CASTING BOB HAVING A CIRCULAR CROSS SECTION AT ITS WIDEST POINT INTO ONE END OF THE TUBE, PUSHING THE CASTING BOB THROUGH THE CASTING SOLUTION WITH A GAS UNDER PRESSURE TO FORM A CONTINUOUS FILM OF CASTING SOLUTION ON THE INSIDE OF THE HOLLOW TUBE, EXPOSING THE FILM TO AIR, AND CONTACTING THE

FILM WITH A LEACHING LIQUID TO FORM A REVERSE OSMOSIS MEMBRANE.

公开(公告)号：US3684094A

公开(公告)日：1972-08-15

申请号：US3684094D

申请日：1970-07-28

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： CHAMBERLIN RICHARD M ,  STANA REGIS R

IPC: B01D61/04 ,  C02F1/66 ,  B01D31/00

CPC classification number: B01D61/04 ,  B01D61/025 ,  B01D2311/04 ,  C02F1/66 ,  B01D2311/18

Abstract: A packing composition effective to reduce the pH of alkaline liquids, used as a pretreatment, in association with a reverse osmosis membrane and support in a liquid treatment system, is made of an encapsulating matrix of polymeric material that is essentially water impermeable at a pH between about 4.5 and 8 and which becomes significantly water permeable at a pH above about 9, and an acidulous material which is encapsulated by the matrix at a pH between about 4.5 and 8, and released progressively from the matrix at a pH above about 9.

Abstract translation: 在液体处理系统中与反渗透膜和反渗透膜相结合的碱性液体的pH值有效降低的包装组合物由聚合物材料的包封基质制成，其基本上不透水， 约4.5和8，并且其在高于约9的pH下变得显着的水可渗透性，以及在pH约4.5至8之间由基质包封的酸性物质，并且在pH高于约9的条件下逐渐从基质中释放。

公开(公告)号：US3427227A

公开(公告)日：1969-02-11

申请号：US3427227D

申请日：1967-01-25

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： CHAMBERLIN RICHARD M

IPC: B01D3/06

CPC classification number: B01D3/065