Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1989-05-31
1991-07-09
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210641, B01D 6136
Patent
active
050303562
ABSTRACT:
A separation process for recovering organic components from liquid streams. The process is a combination of pervaporation and decantation. In cases where the liquid stream contains the organic to be separated in dissolved form, the pervaporation step is used to concentrate the organic to a point above the solubility limit, so that a two-phase permeate is formed and then decanted. In cases where the liquid stream is a two-phase mixture, the decantation step is performed first, to remove the organic product phase, and the residue from the decanter is then treated by pervaporation. The condensed permeate from the pervaporation unit is sufficiently concentrated in the organic component to be fed back to the decanter. The process can be tailored to produce only two streams: an essentially pure organic product stream suitable for reuse, and a residue stream for discharge or reuse.
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M. Goncalves et al., "Pervaporation and Dialysis of Water-Ethanol Solution Using Silicone Rubber Membranes", Sep. Sci. & Tech., 18, 893-904, 1983.
J. P. Brunet et al., "Sorption and Pervaporation of Dilute Aqueous Solutions of Organic Compounds Through Polymer Membranes," J. Mem. Sci., 25, 55-100, 1985.
Baker Richard W.
Blume Ingo
Farrant J.
Membrane Technology & Research Inc.
Spear Frank
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