EP 0635586 B1 19960612 - Process for regenerating hydrochloric acid from pickling installations
Title (en)
Process for regenerating hydrochloric acid from pickling installations
Title (de)
Verfahren zur Regenerierung von Salzsäure aus Beizanlagen
Title (fr)
Procédé de régénération d'acide chlorhydrique à partir d'installations de décapage
Publication
Application
Priority
AT 144993 A 19930721
Abstract (en)
[origin: EP0635586A1] In order to reduce the pollutants in the exhaust gas of regeneration plants for used hydrochloric acid from pickling plants, a process is provided including the thermal cleavage of iron chloride in the used pickling acid to give iron oxide and gaseous hydrochloric acid, at least one compound being added to the used pickling acid which contains nitrogen having a low oxidation number, for example ammonium compounds, ammonia, urea or amides. <IMAGE>
IPC 1-7
IPC 8 full level
G03C 5/395 (2006.01); C01B 7/01 (2006.01); C02F 1/02 (2006.01); C23G 1/36 (2006.01)
CPC (source: EP US)
C23G 1/36 (2013.01 - EP US); Y10S 423/01 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR IT NL SE
DOCDB simple family (publication)
EP 0635586 A1 19950125; EP 0635586 B1 19960612; AT 399516 B 19950526; AT A144993 A 19941015; DE 59400348 D1 19960718; JP 3531840 B2 20040531; JP H07173657 A 19950711; TW 265322 B 19951211; US 6210650 B1 20010403
DOCDB simple family (application)
EP 94110417 A 19940705; AT 144993 A 19930721; DE 59400348 T 19940705; JP 15847894 A 19940711; TW 83105776 A 19940625; US 28094594 A 19940727