SEPARATIONS WITH HIGHLY SELECTIVE FLUOROPOLYMER MEMBRANES
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United States of America Patent
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Issued Date -
Nov 3, 2011
app pub date -
Jan 5, 2010
filing date -
Jan 7, 2009
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Abandoned
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Abstract
A method of separating components of mixtures of chemical compounds uses a nonporous membrane of copolymer of a perfluorinated cyclic or cyclizable monomer, and a 4 carbon dicarboxyl-containing comonomer, such as maleic anhydride. Optionally, the membrane composition includes an acyclic fluorinated olefin termonomer. The membranes provide a remarkably high selectivity of water relative to organic solvents and inorganic acids compared to dipolymer membranes of perfluorinated comonomers.
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