Method of separating organic contaminants from fluid feedstreams with polyphosphazene membranes

Patent · Tue Jan 01 04:00:00 EST 1991

OSTI ID:867863

McCaffrey, Robert R ^[1]; Cummings, Daniel G ^[2]

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1. Milford, MA
2. Idaho Falls, ID

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.

• Research Organization: EG & G IDAHO INC
• DOE Contract Number: AC07-76ID01570
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5022996
• OSTI ID: 867863
• Country of Publication: United States
• Language: English

Related Subjects

/210/
000
10
chloride
contaminants
feedstream
feedstreams
flowed
fluid
fluid feedstream
halogenated
halogenated hydrocarbon
halogenated hydrocarbons
hydrocarbon
hydrocarbons
invented
membrane
membranes
method
methylene
methylene chloride
obtained
opposed
opposed surface
organic
organic contaminant
organic contaminants
outstanding
permeable membrane
permeated
permeates
polar
polyphosphazene
polyphosphazene semipermeable
provided
removed
selectivities
semipermeable
semipermeable membrane
separating
separating organic
separation
surface
unexpected
water