Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1986-12-09
1988-11-29
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210644, 21032164, 21032167, 21032178, B01D 1300
Patent
active
047879823
ABSTRACT:
Continuous flow membrane separation is accomplished by apparatus adaptable for osmosis, dialysis, and electrodialysis. For electrodialysis to separate from one another, in a single step, multiple differing molecular weight components of fluids, a series of adjoining flow chambers are all separated from one another by semipermeable membranes and at least one of the chambers is separated from each adjoining chamber by a membrane having a molecular weight cutoff different from that of the membrane separating it from the other chamber adjoining it. To insure that neither the crude to be processed nor the desired product comes into contact with an electrode which could be deleterious, there is provided a minimum of four flow chambers adjoining one another in sequence.
Adapted for all three separation processes is an assembly of a tubular membrane encircled by a flexible reinforcing mesh fabric with pressure in the fluid within the membrane sufficient to bulge the membrane radially and outward into the interstices of the mesh fabric to eliminate dead spots in fluid flow along the exterior of the membrane and sufficient to stiffen and straighten the membrane tube into essentially the form of a right cylinder. For electrodialysis, one or more additional, similar, successively larger reinforced membrane assemblies, surround(s) the first assembly. A housing encloses the membrane(s) to form a cartridge. The membranes are spaced to avoid contact with electrodes used in electrodialysis.
REFERENCES:
patent: 2864506 (1958-12-01), Hiskey
patent: 3212498 (1965-10-01), McKirdy et al.
patent: 3727612 (1973-04-01), Sayers et al.
patent: 3962075 (1976-06-01), Fialkoff et al.
patent: 3969241 (1976-07-01), Skrabak et al.
WO82/03568, Pursun et al., 10-1982.
Caro Ricardo F.
Salter Robert J.
Klein, Jr. Paul M.
Spear Frank
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