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Title: Organic fluid permeation through fluoropolymer membranes

Separation of the components of liquid mixtures is achieved by contacting a liquid mixture with a nonporous membrane having a fluoropolymer selectively permeable layer and imposing a pressure gradient across the membrane from feed side to permeate side. Unusually high transmembrane flux is obtained when the membrane is subjected to one or more process conditions prior to separation. These include (a) leaving some residual amount of membrane casting solvent in the membrane, and (b) contacting the membrane with a component of the mixture to be separated for a duration effective to saturate the membrane with the component.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1193398
Assignee:
CMS Technologies Holdings, Inc. (Newport, DE) DOESC
Patent Number(s):
9,079,138
Application Number:
13/279,904
Contract Number:
SC0003561
Resource Relation:
Patent File Date: 2011 Oct 24
Research Org:
CMS Technologies Holdings, Inc., Newport, DE (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Works referenced in this record:

High permeable PTMSP/PAN composite membranes for solvent nanofiltration
journal, May 2009
  • Volkov, Alexey V.; Parashchuk, Victor V.; Stamatialis, Dimitris F.
  • Journal of Membrane Science, Vol. 333, Issue 1-2, p. 88-93
  • DOI: 10.1016/j.memsci.2009.01.050

Effects of residual solvent on gas separation properties of polyimide membranes
journal, August 2008
  • Fu, Ywu-Jang; Hu, Chien-Chieh; Qui, Hsuan-zhi
  • Separation and Purification Technology, Vol. 62, Issue 1, p. 175-182
  • DOI: 10.1016/j.seppur.2008.01.008