Back to results
US 2016/0256835 A1Published application
Gas separation membranes based on perfluorinated polymers
AssigneeMembrane Technology and Research, Inc.
InventorsZhenjie He, Timothy C. Merkel, Yoshiyuki Okamoto, Yasuhiro Koike
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a process for separating components of a gas mixture using gas-separation copolymer membranes. These membranes use a selective layer made from copolymers of perfluorodioxolane monomers. 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®.
Claims13
A process for separating two components, A and B, of a gas mixture, comprising:
- (a) passing the gas mixture across a separation membrane having a feed side and a permeate side, the separation membrane having a selective layer comprising a copolymer comprising at least two perfluorodioxolane monomers;
- (b) providing a driving force for transmembrane permeation;
- (c) withdrawing from the permeate side a permeate stream enriched in component A compared to the gas mixture;
- and
- (d) withdrawing from the feed side a residue stream depleted in component A compared to the gas mixture.
2 more elements
Dependencies are inferred from the claim text.