EP 1284931 A1 20030226 - METHOD AND APPARATUS FOR REDUCING AN ELECTROLYTE CONTAINING NITRIC ACID
Title (en)
METHOD AND APPARATUS FOR REDUCING AN ELECTROLYTE CONTAINING NITRIC ACID
Title (de)
VERFAHREN UND VORRICHTUNG ZUR REDUKTION EINES SALPETERSÄURE ENTHALTENDEN ELEKTROLYTS
Title (fr)
PROCEDE ET APPAREIL PERMETTANT DE REDUIRE UN ELECTROLYTE CONTENANT DE L'ACIDE NITREUX
Publication
Application
Priority
EP 0002725 W 20000328
Abstract (en)
[origin: WO0172641A1] Accumulation of nitrous acid is avoided and/or production of nitrogen oxides is suppressed during an electrolytic reduction of an aqueous electrolyte containing nitric acid, and optionally organic matter to be decomposed, by adding an efficient amount of a substance reactive with nitrous acid to the catholyte in such a way that the nitrous acid formed at the cathode is entirely oxidized there to nitric acid. This method can be performed in an apparatus comprising a first container for storing and feeding an oxidable species such as an organic matter, a second container for storing and feeding a nitric acid aqueous solution and further comprising an electrolyser having an anode compartment connected to the first container and a cathode compartment connected to the second container through a nitric acid aqueous solution feeding circuit, said anode compartment and said cathode compartment being separated by a membrane, and further comprising a device for providing a mixture of water and of a substance reactive with nitrous acid and a means for injecting the said mixture into the nitric acid aqueous solution feeding circuit before said nitric acid aqueous solution enters the cathode compartment.
IPC 1-7
IPC 8 full level
C02F 1/467 (2006.01); C02F 1/461 (2006.01); C02F 1/72 (2006.01)
CPC (source: EP)
C02F 1/4672 (2013.01); C02F 1/722 (2013.01); C02F 2001/46133 (2013.01); C02F 2101/006 (2013.01); C02F 2101/16 (2013.01); C02F 2101/30 (2013.01); C02F 2201/46115 (2013.01); C02F 2305/026 (2013.01)
Citation (search report)
See references of WO 0172641A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0172641 A1 20011004; AU 3815100 A 20011008; EP 1284931 A1 20030226
DOCDB simple family (application)
EP 0002725 W 20000328; AU 3815100 A 20000328; EP 00917006 A 20000328