公开(公告)号：US3804259A

公开(公告)日：1974-04-16

申请号：US32596973

申请日：1973-01-23

Applicant: US INTERIOR

Inventor： RIGGLEMAN B ,  YOUNG W

IPC: B01D69/10 ,  B01D31/00

CPC classification number: B01D69/10

Abstract: This invention relates to an improved resin-bonded filament wound support tube for membranes employed in reverse osmosis processes. The support tube is in the form of a cured composite structure and contains at least 20-30 percent by weight of a thermosetting resin. The tube has interior plies of helical filament windings which result in a smooth interior surface for the tube and high strength.

Abstract translation: 本发明涉及用于反渗透方法的改进的用于膜的树脂粘合长丝缠绕支撑管。 支撑管是固化复合结构的形式，并含有至少20-30重量％的热固性树脂。 该管具有螺旋状细丝绕组的内层，其导致用于管的光滑内表面和高强度。

公开(公告)号：US3745202A

公开(公告)日：1973-07-10

申请号：US3745202D

申请日：1971-03-17

Applicant: US INTERIOR

Inventor： RIGGLEMAN B ,  COHEN M ,  GRABLE M

IPC: C08J9/28 ,  C25B13/04 ,  B29D27/00 ,  C08B29/10 ,  C08B29/32

CPC classification number: B01D67/003 ,  B01D67/0027 ,  B01D69/08 ,  C08J9/28 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2301/08 ,  Y10S264/14

Abstract: ASYMMETRIC MEMBRANES ARE PREPARED FROM NON-SELECTIVE THERMALLY GELLED SUBSTRATES OF A CELLULOSE DERIVATIVE. AFTER LEACHING, THE SUBSTRATE IS ANNEALED AND THEN TREATED IN A DILUTE AQUEOUS SOLUTION OF EITHER P-DIOXANE, FORMIC ACIDS OR NITROMETHANE AT AN ELEVATED TEMPERATURE. THE RESULTING SEMIPERMEABLE MEMBRANE IS PARTICULARLY SUITED FOR DESALINATION BY REVERSE OSMOSIS.