Title: Amorphous fluorinated copolymer gas separation membranes

Abstract

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.

Inventors:

Shangguan, Ning; Feiring, Andrew Edward; Majumdar, Sudipto

Issue Date:

Tue Mar 24 00:00:00 EDT 2020

Research Org.:

Compact Membrane Systems, Inc., Newport, DE (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1637783

Patent Number(s):

10596527

Application Number:

15/574,408

Assignee:

Compact Membrane Systems, Inc. (Newport, DE)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2323/06 - Specific viscosities of materials involved
B01D2323/08 - Specific temperatures applied
B01D2325/20 - Specific permeability or cut-off range
B01D53/228 - {characterised by specific membranes}
B01D67/0006 - {by chemical reactions
B01D71/32 - containing fluorine atoms
B01D71/52 - Polyethers
B01D71/76 - Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C17/38 - Separation
C07C21/18 - containing fluorine
C07C21/185 - tetrafluorethene

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

C08F214/186 - {with non-fluorinated comonomers}

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DOE Contract Number:  

SC0011989

Resource Type:

Patent

Resource Relation:

Patent File Date: 06/10/2016

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY