Liquid purification or separation – Filter – Material
Patent
1997-10-07
1999-07-13
Fortuna, Ana
Liquid purification or separation
Filter
Material
210490, 21050038, 21050039, 264 41, 427245, 427244, B01D 3900
Patent
active
059222034
ABSTRACT:
Water permeable reverse osmosis membranes are prepared by interfacially polymerizing on a microporous support an essentially monomeric polyamine reactant having at least two amine functional groups per reactant molecule, and an essentially monomeric amine-reactive polyfunctional aromatic or cycloaliphatic acyl halide having on the average at least about 2 acyl halide groups per reactant molecule. The polymerization is optionally carried out in the presence of a monomeric amine salt, which increases the flux rate of the resulting membrane. Preferred polyamine compounds of the generic formula, which are novel per se, include 3,5-diaminobenzoyl piperazine, 4-aminobenzoyl piperazine, 3-aminobenzoyl piperazine, isophthaloyl piperazine, and terephthaloyl piperazine.
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Fortuna Ana
Hydranautics
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