Membrane and process for producing the membrane

Details Membrane and process for producing the membrane Membrane and process for producing the membrane

1986-12-05

1990-06-19

Spear, Frank

Liquid purification or separation

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2105004, 21050043, 264 41, B01D 7106

Patent

active

049351400

ABSTRACT:
A membrane for hemodialysis is prepared by casting, extruding or spinning a solution of a polyether-polycarbonate block copolymer and a swelling agent having a molecular weight of about 1,000 to about 20,000 Daltons, then partially evaporating the solvent, gelling and washing. The membrane has a top cut-off value less than about 68,000 Daltons, and hence is substantially impermeable to albumin, but nonetheless provides high permeability to water and to other small molecules.

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patent: 4595503 (1986-06-01), Schindler et al.
patent: 4608172 (1986-08-01), Goehl et al.
patent: 4686044 (1987-08-01), Behnke et al.
Wendt et al., "Sieving Properties of Hemodialysis Membranes", Journal of Membrane Science, 5(1979) 23-49.
Israel Cabasso et al., "Polysulfone Hollow Fibers", Journal of Applied Polymer Science, vol. 20, 2377-2394 (1976).

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