B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 69/08 (2006.01) B01D 61/14 (2006.01) B01D 61/24 (2006.01) B01D 69/02 (2006.01) C12M 1/12 (2006.01) C12M 3/06 (2006.01)
Patent
CA 2134327
The invention provides dual-skinned membrane useful as one way or rectifying membranes which seduce 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 skins of polymer on the opposite sides with differing permeability to solutes and sieving coefficient characteristics. The skin on each side have pores that are invisible at 10,000 times magnification, the microporous structure between said skins contains pores capable of retaining solutes in a molecular weight range of about 5000 to 200,000 in an increased concentration between the interior and the exterior skins. Improved dialysis devices are formed by using bundles of the hollow fiber membranes as a dialysis means having rectifying properties.
Brown Richard I.
Henderson Lee W.
Ofsthun Norma J.
Pauley Robin G.
Baxter International Inc.
Sim & Mcburney
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