Separations of hazardous organics from gas and liquid feedstreams using phosphazene polymer membranes

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399308019490· OSTI ID:145164

Peterson, E S; Stone, M L; Cummings, D G; McCaffrey, R R ^[1]

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1. Idaho National Engineering Lab., Idaho Falls (United States)

The liquid-liquid and gas separation properties for the separation of hazardous organic feed streams using pervaporation and gas separation methods with poly[bis(phenoxy)phosphazene] based membranes are reported. Liquid transport behavior was determined using pervaporation techniques. The preliminary gas separations were studied using a mixed gas separation method which the authors have described previously. Using the membrane pervaporation technique, separation factors of 10,000 have been routinely achieved for the separation of methylene chloride from water. Other tests have shown similar results for the removal of hydrocarbon vapors from air. Membranes were prepared using solution casting techniques. Solvent evaporation rates during the casting and subsequent curing processes were controlled to provide a consistent membrane microstructure. These results suggest that polyphosphazene membrane technology could effectively be used in cleaning up air and ground water that has been contaminated with chlorinated hydrocarbons.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 145164
• Report Number(s): CONF-911049--
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 1-3 Vol. 28; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AIR
AIR CLEANING SYSTEMS
CHLORINATED ALIPHATIC HYDROCARBONS
CLEANING
GROUND WATER
MEMBRANE TRANSPORT
MEMBRANES
METHYL CHLORIDE
SEPARATION PROCESSES
WASTE PROCESSING