EP 0356805 A3 19900418 - PROCESS FOR THE PRODUCTION OF ALKALI DICHROMATES AND CHROMIC ACID
Title (en)
PROCESS FOR THE PRODUCTION OF ALKALI DICHROMATES AND CHROMIC ACID
Publication
Application
Priority
DE 3829123 A 19880827
Abstract (en)
[origin: EP0356805A2] The present invention relates to a process for the production of alkali dichromates and chromic acid by electrolysing monochromate and/or dichromate solutions in electrolysis cells whose anode and cathode spaces are separated by cation exchanger membranes, an anolyte liquid which contains dichromate and/or chromic acid being produced in the anode space and an alkali catholyte fluid containing alkali-metal ions being produced in the cathode space.
IPC 1-7
IPC 8 full level
C01G 37/14 (2006.01); C25B 1/14 (2006.01); C25B 1/22 (2006.01); C25B 1/28 (2006.01)
CPC (source: EP US)
C25B 1/22 (2013.01 - EP US)
Citation (search report)
- [A] GB 2051868 A 19810121 - DIAMOND SHAMROCK CORP
- [A] CHEMICAL ABSTRACTS, Band 87, Nr. 20, 14. November 1977, Seite 463, Zusammenfassung Nr. 159202k, Columbus, Ohio, US; & JP-A-77 81 097 (K. SAITO) 07-07-1977
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0356805 A2 19900307; EP 0356805 A3 19900418; EP 0356805 B1 19920520; AR 244811 A1 19931130; BR 8904280 A 19900417; CA 1337807 C 19951226; DE 3829123 A1 19900301; DE 58901477 D1 19920625; JP 2839155 B2 19981216; JP H02102128 A 19900413; MX 170143 B 19930809; US 5094729 A 19920310; ZA 896499 B 19900530
DOCDB simple family (application)
EP 89115033 A 19890815; AR 31475389 A 19890525; BR 8904280 A 19890825; CA 609441 A 19890825; DE 3829123 A 19880827; DE 58901477 T 19890815; JP 21618389 A 19890824; MX 1710589 A 19890808; US 65943591 A 19910222; ZA 896499 A 19890825