Method of separating organic contaminants from fluid feedstreams

Details Method of separating organic contaminants from fluid feedstreams Method of separating organic contaminants from fluid feedstreams

1990-04-30

1991-06-11

Sever, Frank

Liquid purification or separation

Processes

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

21050027, B01D 614

Patent

active

050229966

ABSTRACT:
A method is provided for separating halogenated hydrocarbons from a fluid feedstream. The fluid feedstream is flowed across a first surface of a polyphosphazene semipermeable membrane. At least one halogenated hydrocarbon from the fluid feedstream permeates through the polyphosphazene semipermeable membrane to a second opposed surface of the semipermeable membrane. Then the permeated polar hydrocarbon is removed from the second opposed surface of the polyphosphazene semipermeable membrane. Outstanding and unexpected separation selectivities on the order of 10,000 were obtained for methylene chloride when a methylene chloride in water feedstream was flowed across the polyphosphazene semipermeable membrane in the invented method.

REFERENCES:
patent: 4783202 (1988-11-01), Kraus et al.

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