Ultrathin-skinned asymmetric membranes by immiscible solvents tr

Details Ultrathin-skinned asymmetric membranes by immiscible solvents tr Ultrathin-skinned asymmetric membranes by immiscible solvents tr

1988-10-27

1989-11-28

Spear, Frank

Liquid purification or separation

Filter

Material

55158, 21050031, 21050030, 21050029, 264 41, B01L 1300

Patent

active

048835935

ABSTRACT:
Improved semipermeable asymmetric fluid separation membranes useful in gas, vapor and liquid separations are disclosed. The membranes are prepared by substantially filling the pores of asymmetric cellulosic semipermeable membranes having a finely porous layer on one side thereof with a water immiscible organic liquid, followed by contacting the finely porous layer with water.

REFERENCES:
patent: 3592672 (1971-07-01), Rowley et al.
patent: 3772072 (1973-11-01), Brown et al.

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