FI752858

1485708 Cation exchange membranes DIAMOND SHAMROCK CORP 15 Oct 1975 [16 Oct 1974] 42310/75 Heading C3P [Also in Divisions B5 and C7] Cation exchange membranes for use in an electrolytic cell are obtained by surface treatment of a membrane comprising a fluorine-containing polymer having pendant sulph...

Full description

Saved in:
Bibliographic Details
Main Authors BABINSKY ANDREW D, HORA CHARLES J
Format Patent
LanguageEnglish
Published 17.04.1976
Edition2
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
APPARATUS THEREFOR
CHEMISTRY
COMPOSITIONS BASED THEREON
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
Online AccessGet full text

Cover

More Information
Summary:1485708 Cation exchange membranes DIAMOND SHAMROCK CORP 15 Oct 1975 [16 Oct 1974] 42310/75 Heading C3P [Also in Divisions B5 and C7] Cation exchange membranes for use in an electrolytic cell are obtained by surface treatment of a membrane comprising a fluorine-containing polymer having pendant sulphonyl groups with an ethylene diamine to convert the sulphonyl groups to a depth of 5-75 microns to the form on one side only, the remaining sulphonyl groups being converted to -SO 3 R where R is H, Na or K and R1 is R or -SO 2 -. The membrane is preferably formed from a copolymer of tetrafluoroethylene and CF 2 = CFYfSO 2 F where Yf is a bivalent C 2 -C 8 perfluorinated radical. After treatment on one side with ethylene diamine, the membrane is further treated with alkali metal hydroxide to hydrolyse other -SO 2 F groups to -SO 3 R. The membrane is used in the electrolysis of brine with the treated surface facing the cathode.
Bibliography:Application Number: FI19750002858