Chlorine tolerant composite semipermeable membrane

Details Chlorine tolerant composite semipermeable membrane Chlorine tolerant composite semipermeable membrane

1988-12-01

1990-04-03

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050034, 21050035, 21050037, B01D 1300

Patent

active

049138162

ABSTRACT:
A thin film composite (TFC) semipermeable membrane on a semiporous substrate is produced by an interfacial polymerization reaction between (1) an aqueous phase comprising a blend of water soluble and water dispersable compounds, (the latter being a chlorine or other oxidant neutralizer which protects the resulting semipermeable membrane from short term damage by chlorine or other oxidants) and (2) an organic phase comprising polyfunctional crosslinking reagents capable of reacting and/or polymerizing with one or more of the ingredients of said aqueous phase.

REFERENCES:
patent: 4802984 (1989-02-01), Waite

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