EP 1381715 A1 20040121 - METHOD FOR SIMULTANEOUS ELECTROCHEMICAL PRODUCTION OF SODIUM DITHIONITE AND SODIUM PEROXODISULFATE
Title (en)
METHOD FOR SIMULTANEOUS ELECTROCHEMICAL PRODUCTION OF SODIUM DITHIONITE AND SODIUM PEROXODISULFATE
Title (de)
VERFAHREN ZUR GLEICHZEITIGEN ELEKTROCHEMISCHEN HERSTELLUNG VON NATRIUMDITHIONIT UND NATRIUMPEROXODISULFAT
Title (fr)
PROCEDE DE PRODUCTION ELECTROCHIMIQUE SIMULTANEE DE DITHIONITE DE SODIUM ET DE PEROXODISULFATE DE SODIUM
Publication
Application
Priority
- CA 2345451 A 20010427
- DE 19954299 A 19991111
- EP 0104790 W 20010427
- US 84502101 A 20010427
Abstract (en)
[origin: DE19954299A1] Simultaneous production of sodium peroxodisulfate (I) and sodium dithionite (II) is carried out in a divided electrolysis cell at current densities of 1.5-6 kA/m<2> and 20-60 deg C. The process comprises (i) anodic oxidation of sodium sulfate in aqueous solution to (I); and (ii) cathodic production of (II) from sodium ions, which are liberated at the anode and pass through the cation exchange membrane, and added sulfur dioxide at pH 4-6.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
C25B 1/14 (2013.01 - EP US); C25B 1/28 (2013.01 - EP US); C25B 1/29 (2021.01 - EP US)
Citation (search report)
See references of WO 02088429A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
DE 19954299 A1 20010517; CA 2345451 A1 20021027; EP 1381715 A1 20040121; US 6454929 B1 20020924; WO 02088429 A1 20021107
DOCDB simple family (application)
DE 19954299 A 19991111; CA 2345451 A 20010427; EP 0104790 W 20010427; EP 01933903 A 20010427; US 84502101 A 20010427