EP 0571273 A1 19931124 - Process for the production of alkali metal chlorate and apparatus therefor.
Title (en)
Process for the production of alkali metal chlorate and apparatus therefor.
Title (de)
Verfahren zur Herstellung von Alkalimetall-Chlorat und Vorrichtung zur deren Durchführung.
Title (fr)
Procédé de fabrication de chlorate de métal alcalin et dispositif pour sa mise en oeuvre.
Publication
Application
Priority
FR 9206112 A 19920520
Abstract (en)
Process for the preparation of an alkali metal chlorate by electrolysis in a diaphragm cell (3) of an anolyte comprising a solution of alkali metal chloride and of a catholyte comprising a solution of alkali metal hydroxide, the solution of alkali metal chloride being purified beforehand by the succession of the following stages: - electrolysis in a cell of the "chloralkali" type (1) of an alkali metal chloride brine to form, on the one hand, gaseous chlorine and, on the other hand, a concentrated solution of alkali metal hydroxide, - transfer of the gaseous chlorine and of the alkali metal hydroxide solution which are produced into a scrubbing column (2) to react them with each other, and - recovery of the saline solution thus obtained for its use as anolyte in the diaphragm cell (3). The invention also relates to a device for making use of this process and a device for purifying an alkali metal chloride brine. <IMAGE>
IPC 1-7
IPC 8 full level
C01B 11/14 (2006.01); C01D 1/38 (2006.01); C01D 1/40 (2006.01); C25B 1/26 (2006.01); C25B 15/08 (2006.01)
CPC (source: EP KR)
C25B 1/265 (2013.01 - EP KR); C25B 1/46 (2013.01 - KR); C25B 15/02 (2013.01 - KR); C25B 15/085 (2021.01 - KR)
Citation (search report)
- [A] US 4405418 A 19830920 - TAKEMURA REIJI [JP]
- [A] Week 8244, Derwent Publications Ltd., London, GB; AN 82-94068 & JP-A-57 156 326 (TOA GOSEI CHEM IND LTD) 27 Septembre 1982
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0571273 A1 19931124; AU 3868193 A 19931125; BR 9301932 A 19931123; CA 2096588 A1 19931121; CN 1084584 A 19940330; CZ 95293 A3 19931215; FI 932299 A0 19930519; FI 932299 A 19931121; FR 2691479 A1 19931126; FR 2691479 B1 19940819; IL 105718 A0 19930922; JP H06158373 A 19940607; KR 930023492 A 19931218; MX 9302943 A 19931201; NO 931798 D0 19930518; NO 931798 L 19931122; NZ 247644 A 19940927; PL 299000 A1 19931213; SK 49793 A3 19931208; TW 230848 B 19940921; YU 34493 A 19960219; ZA 933454 B 19940615
DOCDB simple family (application)
EP 93401275 A 19930518; AU 3868193 A 19930519; BR 9301932 A 19930519; CA 2096588 A 19930519; CN 93107230 A 19930520; CZ 95293 A 19930519; FI 932299 A 19930519; FR 9206112 A 19920520; IL 10571893 A 19930517; JP 14157493 A 19930520; KR 930008687 A 19930520; MX 9302943 A 19930520; NO 931798 A 19930518; NZ 24764493 A 19930518; PL 29900093 A 19930519; SK 49793 A 19930518; TW 82104283 A 19930529; YU 34493 A 19930519; ZA 933454 A 19930518