High flux hollow fiber membrane

Details High flux hollow fiber membrane High flux hollow fiber membrane

1992-05-29

1993-08-03

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

2103218, 21050023, 21050041, B01D 6128

Patent

active

052326012

ABSTRACT:
A morphologically heterogeneous, hydrophobic polysulfone hollow fiber membrane comprising a sponge-like dense inner surface permeable to molecules of less than or equal to 30,000 Daltons, said inner surface having a fraction surface porosity from about 70 to about 80%; and an outer surface having large pores ranging from about 6 to about 16 .mu.m in diameter and small pores less than 500.ANG. in diameter and a fractional surface porosity from about 20 to about 30%; a method for producing same and a hemodialysis treatment method and apparatus incorporating same.

REFERENCES:
patent: 4720343 (1988-01-01), Walch et al.
patent: 4906375 (1990-03-01), Heilmann

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