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Method for producing a selectively permeable separation module

United States Patent

6,036,030
March 14, 2000
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
A method and apparatus is provided for casting a polymeric membrane on the inside surface of porous tubes to provide a permeate filter system capable of withstanding hostile operating conditions and having excellent selectivity capabilities. Any polymer in solution, by either solvent means or melt processing means, is capable of being used in the present invention to form a thin polymer membrane having uniform thickness on the inside surface of a porous tube. Multiple tubes configured as a tubular module can also be coated with the polymer solution. By positioning the longitudinal axis of the tubes in a substantially horizontal position and rotating the tube about the longitudinal axis, the polymer solution coats the inside surface of the porous tubes without substantially infiltrating the pores of the porous tubes, thereby providing a permeate filter system having enhanced separation capabilities.
Stone; Mark L. (Idaho Falls, ID), Orme; Christopher J. (Shelley, ID), Peterson; Eric S. (Idaho Falls, ID)
Bechtel BWXT Idaho LLC (Idaho Falls, ID)
08/ 965,654
November 6, 1997
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. DE-AC07-76ID01570 between the U.S. Department of Energy and EG&G Idaho, Inc., now Contract No. DE-AC07-94ID13223 between the U.S. Department of Energy and Lockheed Idaho Technologies Company.