Membrane separation method

Details Membrane separation method Membrane separation method

B - Operations, Transporting

01

D

B01D 61/36 (2006.01) B01D 69/12 (2006.01) C07C 29/76 (2006.01)

Patent

CA 2073379

MEMBRANE SEPARATION METHOD D#79,661-F ABSTRACT OF THE INVENTION 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 -COC1 groups CGS79661 .ETN OCIOB~:R 28, 1991

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