Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1985-09-17
1988-08-23
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210640, B01D 1300
Patent
active
047659041
ABSTRACT:
A method and apparatus for evaporation and liquid separation which (1) a liquid to be treated and a carrier for evaporating molecules are maintained in contact wiht opposite sides of a thin membrane which has capillaries extending between the opposite sides of the membrane of substantially uniform size; (2) the liquid is placed in contact with one side of the membrane and enters the capillaries to a level which is separated from a second side of the membrane by a distance which is preferably less than 30% of the capillary length; (3) the diameters of the capillaries are chosen so that the evaporating substance exerts a partial pressure in the proximity of a convex capillary meniscus which is significantly higher than the corresponding partial pressure in the evaporate's carrier. Preferably the method of the invention is carried out cyclically.
REFERENCES:
patent: 3332746 (1967-07-01), Chaff et al.
patent: 3355382 (1967-11-01), Huntington
patent: 4265713 (1981-05-01), Cheng
patent: 4579662 (1986-04-01), Jonsson
Findley, M. E., "Vaporization Through Porous Membranes", pp. 129, 130, 5-1966.
Brown James J.
Spear Frank
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