Semipermeable membranes and the method for the preparation there

Details Semipermeable membranes and the method for the preparation there Semipermeable membranes and the method for the preparation there

1975-09-22

1977-01-25

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210500M, B01D 1304

Patent

active

040050122

ABSTRACT:
Semipermeable membranes which are useful in reverse osmosis processes are prepared by forming a polymeric ultra-thin film which possesses semipermeable properties on a microporous support. An example of the composite semipermeable membrane comprising an ultra-thin film formed by contacting an amine modified polyepihalohydrin with a polyfunctional agent and depositing this film on one surface of a microporous substrate.

REFERENCES:
patent: 3642663 (1972-02-01), Greer
patent: 3755207 (1973-09-01), Karatsu
patent: 3803237 (1974-04-01), Lednicer et al.

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