Amorphous fluorinated copolymer gas separation membranes
Membranes having a permselective active layer of a copolymerized perfluorinated monomer and an non-fluorinated alkylvinylester monomer demonstrate superior selective permeability performance for separating gas mixtures compared to membranes of exclusively perfluorinated polymers. Preferred active layer compositions are copolymers of perfluoro-2,2-dimethyl-1,3 dioxole (PDD) copolymerized with an alkylvinyl ester such as vinyl acetate, and vinyl pivalate, and with alkylvinyl esters that are substantially hydrolyzed to provide copolymerized vinyl alcohol functionality. The membranes can have a thin, high diffusion rate, “gutter layer” of a fluorinated polymer highly permeable to nitrogen positioned between the active layer and a porous support layer. A novel copolymer effective in selectively permeable membranes is a copolymer of PDD and an alkylvinyl ester compound having the formula H2C═CHOC(O)R1 in which R1 is a linear or branched alkyl group of from 2 to 5 carbon atoms.
- Research Organization:
- Compact Membrane Systems, Inc., Newport, DE (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- SC0011989
- Assignee:
- Compact Membrane Systems, Inc. (Newport, DE)
- Patent Number(s):
- 10,596,527
- Application Number:
- 15/574,408
- OSTI ID:
- 1637783
- Country of Publication:
- United States
- Language:
- English
The removal of hydrogen sulfide from gas streams using an aqueous metal sulfate absorbentPart I. The absorption of hydrogen sulfide in metal sulfate solutions
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journal | June 2005 |
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