Liquid purification or separation – Casing divided by membrane into sections having inlet – Membrane secured with adhesive of specified composition
Patent
1988-09-06
1989-06-27
Sever, Frank
Liquid purification or separation
Casing divided by membrane into sections having inlet
Membrane secured with adhesive of specified composition
21032174, 21032183, B01D 1300
Patent
active
048427365
ABSTRACT:
A spiral wound membrane cartridge for use in separating a first component from a feed fluid mixture of the first component and the second component. The cartridge includes a permeate collection tube and at least one permeate carrier leaf extending outwardly from the tube. The cartridge further includes at least one sandwich leaf extending outwardly from the tube and including a length of a semipermeable membrane sheet which has an active membrane side and a backing side. This sheet is folded in two, having the fold positioned adjacent the tube and with the membrane sides of the two parts of the folded sheet facing. The sandwich leaf also includes a length of a feed carrier positioned between the two parts of the folded membrane sheet. The sandwich leaf includes a flexible sealer which penetrates and seals the interstices of the backing side in the area of the fold so that, in the event of damage to the membrane side adjacent the fold, the sealer prevents leakage of the feed fluid mixture to the permeate collection tube. Methods of making the sandwich leaf are also disclosed.
REFERENCES:
patent: 3504796 (1970-04-01), Bray
patent: 3813334 (1974-05-01), Bray
patent: 3966616 (1976-06-01), Bray
patent: 4548714 (1985-10-01), Kirwan, Jr. et al.
patent: 4756835 (1988-07-01), Wilson
Bray Donald T.
Hopkins David H.
Desalination Systems Inc.
Sever Frank
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