Membrane separation of methanol from formaldehyde aqueous mixtur

Details Membrane separation of methanol from formaldehyde aqueous mixtur Membrane separation of methanol from formaldehyde aqueous mixtur

1977-11-09

1978-08-22

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 23F, 210500M, B01D 1300

Patent

active

041087658

ABSTRACT:
Methanol is separated from formaldehyde aqueous mixtures by contacting the aqueous mixture feed with a first surface of a polymeric membrane selectively permeable to the methanol over the formaldehyde or formaldehyde and water; while maintaining a second and opposite membrane surface at a lower chemical potential than the first membrane surface for the methanol permeating a portion of the methanol into and through the membrane, and withdrawing from the second membrane surface a mixture having a higher total concentration of methanol in relationship to the formaldehyde or formaldehyde and water than in the methanol, formaldehyde aqueous feed mixtures.

REFERENCES:
patent: 2981680 (1961-04-01), Binning
patent: 3931000 (1976-01-01), Hamilton
patent: 3950247 (1976-04-01), Chiang et al.
patent: 3956112 (1976-05-01), Lee et al.

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