Semipermeable membranes

Details Semipermeable membranes Semipermeable membranes

1987-09-28

1989-05-09

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210490, 21050037, 427245, B01L 1300

Patent

active

048287083

ABSTRACT:
A reverse osmosis membrane with excellent nitrate rejection that is particularly suitable for point-of-use drinking water purposes. The reverse osmosis membrane is a composite material comprising a porous support layer and an ultrathin polyamide desalinizing layer which is the interfacial condensation reaction product of (a) meta-phenylenediamine and (b) a mixture of a major portion of isophthaloyl chloride and a minor proportion of trimesoyl chloride.

REFERENCES:
patent: 4606943 (1986-08-01), Rak et al.

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