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Organic fluid permeation through fluoropolymer membranes

United States Patent

July 14, 2015
View the Complete Patent at the US Patent & Trademark Office
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.
Nemser; Stuart M. (Wilmington, DE), Kosaraju; Praveen (New Castle, DE), Bowser; John (Newark, DE)
CMS Technologies Holdings, Inc. (Newport, DE)
13/ 279,904
October 24, 2011
Support was provided under Department of Energy award DE-SC0003561. The U.S. government has rights in this patent application.