IT1056147B - Cation exchange membrane of fluoro polymer - with sulphonyl gps. modified by amination, for electrolysis of alkali chlorides - Google Patents

Cation exchange membrane of fluoro polymer - with sulphonyl gps. modified by amination, for electrolysis of alkali chlorides

Info

Publication number
IT1056147B
IT1056147B IT5178075A IT5178075A IT1056147B IT 1056147 B IT1056147 B IT 1056147B IT 5178075 A IT5178075 A IT 5178075A IT 5178075 A IT5178075 A IT 5178075A IT 1056147 B IT1056147 B IT 1056147B
Authority
IT
Italy
Prior art keywords
gps
sulphonyl
electrolysis
cation exchange
exchange membrane
Prior art date
Application number
IT5178075A
Other languages
Italian (it)
Original Assignee
Diamond Shamrock Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/587,047 external-priority patent/US4081349A/en
Application filed by Diamond Shamrock Corp filed Critical Diamond Shamrock Corp
Application granted granted Critical
Publication of IT1056147B publication Critical patent/IT1056147B/en

Links

Landscapes

  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

A cation exchange membrane comprising a fluoro polymer with sulphonyl gps. in the side chains, has one surface which has been treated with a polyamine to convert most of the sulphonyl gps. to a depth of >10u to gps. of formula SO2NRR'NRR" (where R is H, Na or K. R' is 3-6C alkylene, Z2N(R") gp. or ZN(R")Z2N(R") gp. Z is 2-6C alkylene and R" is R or -SO2). The pref. polymer is a copolymer of tetrafluoroethylene and a monomer of formula CF2=CFYfSO2F (where Yf is a 2-8C bifunctional aliphatic gp) and it has a mol. wt. of 1100-1200 per proton equiv. Also claimed is an electrolytic cell using the above membrane between anode and cathode. Used for electrolysis of alkali chlorides for prodn. of Cl and alkali metal hydroxides, the amine modified side of the membrane facing the cathode. Migration of OH ions back intot the anode compartment is prevented resulting in reduced formation of chlorate and oxygen and increased current yield.
IT5178075A 1975-06-16 1975-10-15 Cation exchange membrane of fluoro polymer - with sulphonyl gps. modified by amination, for electrolysis of alkali chlorides IT1056147B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/587,047 US4081349A (en) 1974-10-16 1975-06-16 Polyamine modified membranes and chlor-alkali electrolysis cells employing same
US51516675A 1975-10-16 1975-10-16

Publications (1)

Publication Number Publication Date
IT1056147B true IT1056147B (en) 1982-01-30

Family

ID=27058420

Family Applications (1)

Application Number Title Priority Date Filing Date
IT5178075A IT1056147B (en) 1975-06-16 1975-10-15 Cation exchange membrane of fluoro polymer - with sulphonyl gps. modified by amination, for electrolysis of alkali chlorides

Country Status (1)

Country Link
IT (1) IT1056147B (en)

Similar Documents

Publication Publication Date Title
US4065366B1 (en)
JPS5779184A (en) Electrolytic tank having improved ion exchange membrane and operation thereof
PL208432A1 (en) METHOD OF MAKING CARBONATES OF ALKALINE METALS WAY OF ELECTROLYSIS
ES475786A1 (en) Generation of halogens by electrolysis of hydrogen halides in a cell having catalytic electrodes bonded to a solid polymer electrolyte
EG11807A (en) Composite cation exchange membrane and use thereof in electrolysis of an alkali metal halide
SE7703520L (en) ELECTROLYSIS OF ALKALIMETAL HALID SOLUTION
ES477525A1 (en) Process for the production of aluminium by electrolysis of fused salts.
GB2009795A (en) Production of halogens by electrolysis of alkali metal halides in an electrolysis cell having catalytic electrodes bonded to the surface of a solid polymer electrolyte membrane
GB1495122A (en) Electrolytic production of hydroxides
GB1421547A (en) Electrlysis cell and method
JPS55107792A (en) Electrode having mixed metal oxide catalyst
IL54539A (en) Fluorinated ion exchange polymers containing carboxylic groups,their production and their use as membranes in chloralkali electrolysis cells
KR940011665A (en) Method for producing pure nickel hydroxide and uses thereof
IL54540A (en) Laminar structures having a base layer of a fluorinated ion exchange polymer containing carboxylic groups and their use as separators in chloralkali electrolytic cells
IT1056147B (en) Cation exchange membrane of fluoro polymer - with sulphonyl gps. modified by amination, for electrolysis of alkali chlorides
JPS5447877A (en) Electrolyzing method for alkali metal chloride
JPS5739185A (en) Cation exchange membrane for electrolysis
JPS5411098A (en) Electrolyzing method for aqueous solution of alkali metal salt
GB1485708A (en) Electrolytic cell membranes
JPS56152980A (en) Production of alkali hydroxide
JPS5719390A (en) Method for mounting ion exchange membrane to electrolytic cell
JPS5315296A (en) Diaphragm fused electrolyzing method for sodium chloride
FR2359220A2 (en) Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane
FR2288162B1 (en)
IT1062627B (en) Electrolytic prodn. of alkali metal carbonate - using two-compartment cell with fluorinated copolymer membrane