Gas separation membranes based on fluorinated and perfluorinated polymers
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United States of America Patent
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May 9, 2017
Grant Date -
Feb 18, 2016
app pub date -
Oct 23, 2015
filing date -
Feb 19, 2014
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Abstract
A process for separating components of a gas mixture using gas-separation copolymer membranes. These membranes use a selective layer made from copolymers of partially fluorinated or perfluorinated dioxolane monomers and a second monomer, such as dioxane or a partially fluorinated dioxolane. The resulting membranes have superior selectivity performance for gas pairs of interest while maintaining fast gas permeance compared to membranes prepared using conventional perfluoropolymers, such as Teflon® AF, Hyflon® AD, and Cytop®.
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