Fluorinated cation exchange membrane and use thereof in electrolysis of an alkali metal halide
US4508603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1978 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Nov 3, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fluorinated cation exchange membrane is formed using a copolymer of a fluorovinyl ether (I) having the formula EQU CF.sub.2 .dbd.CF--O--CF.sub.2 --CFXOCF.sub.2).sub.l (CFX').sub.m (CF OCFX").sub.n A wherein l is 0 to 3; m is 2 to 6; n is 0 to 4 and one of l and n is not zero and l+m+n.gtoreq.3; X, X' and X" are the same or different and each respectively represent --F or --CF.sub.3 ; A represents --CN,--COF, --COOH, --COOR,--COOM or --CONR.sub.2 R.sub.3 ; R.sub.1 represents a C.sub.1-10 alkyl group; and M represents an alkali metal or a quaternary ammonium salt; and a fluorinated olefin (II), or a hydrolyzed copolymer thereof. The fluorinated cation exchange membrane is used for production of a halogen and an alkali metal hydroxide by electrolysis of an alkali metal hydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.