Membrane separation method

Details Membrane separation method Membrane separation method

1991-11-18

1992-08-18

Sever, Frank

Liquid purification or separation

Processes

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

210654, B01D 6137

Patent

active

051396777

ABSTRACT:
A solution of isopropanol or ethanol is concentrated by pervaporation across a membrane of polyurea polymer or polyamide polymer prepared by interfacial polymerization of (i) an amine monomer containing at least two primary or secondary amine nitrogens and (ii) an isocyanate monomer containing at least two --NCO groups or a carbonyl chloride monomer containing at least two --COCl groups.

REFERENCES:
patent: 4613440 (1986-09-01), Zupancic

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