Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1992-01-10
1993-08-31
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
21050023, 21050041, B01D 6128
Patent
active
052406148
ABSTRACT:
The invention employs dual-skinned membranes useful as one way or rectifying membranes which reduce back filtration of solute molecules in dialysis and which improve nutrient supply and product recovery in membrane bioreactors. The membranes are dual-skinned polymeric materials preferably in the form of hollow fibers. The membranes have sieving coefficient characteristics different for flow of liquids in one direction from that in the opposite direction. Improved dialysis devices are formed by using bundles of the hollow fiber membranes as a dialysis means having rectifying properties. Improved bioreactors are formed by using bundles of hollow fiber as a growth vessel having rectifying properties.
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Brown Richard I.
Henderson Lee W.
Ofsthun Normal J.
Pauley Robin G.
Baxter International Inc.
Maki Allan O.
Mattenson Charles R.
Spear Frank
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