EP 2366036 A1 20110921 - RECOVERY OF METALS AND ACIDS FROM EXHAUSTED PICKLING SOLUTIONS AND/OR NEUTRALIZATION SLUDGE
Title (en)
RECOVERY OF METALS AND ACIDS FROM EXHAUSTED PICKLING SOLUTIONS AND/OR NEUTRALIZATION SLUDGE
Title (de)
RÜCKGEWINNUNG VON METALLEN UND SÄUREN AUS ERSCHÖPFTEN BEIZLÖSUNGEN UND/ODER NEUTRALISATIONSSCHLAMM
Title (fr)
RÉCUPÉRATION DE MÉTAUX ET D'ACIDES À PARTIR DE SOLUTIONS DÉCAPANTES ÉPUISÉES ET/OU DE BOUES DE NEUTRALISATION
Publication
Application
Priority
- EP 2009007925 W 20091102
- IT VA20080056 A 20081106
Abstract (en)
[origin: WO2010051992A1] A process of complete recovery of metals and acids from solutions and sludge polluted with metals coming from stainless steel works is disclosed. Volatile acids are recovered from exhausted pickling solutions through distillation in presence of sulphuric acid while metals are separately recovered in the elementary form or as hydroxides and salts. The treatment is also applied to sludge produced by neutralization of steel works waste, even when said sludge is already stored in dump sites, where a previous redissolution in an acidic medium is required.
IPC 8 full level
C22B 3/44 (2006.01); C22B 3/08 (2006.01); C22B 7/00 (2006.01); C22B 23/00 (2006.01); C22B 34/32 (2006.01); C23G 1/36 (2006.01)
CPC (source: EP)
C01B 7/196 (2013.01); C01B 17/901 (2013.01); C01G 37/02 (2013.01); C01G 37/08 (2013.01); C01G 49/02 (2013.01); C01G 49/14 (2013.01); C01G 53/04 (2013.01); C01G 53/10 (2013.01); C22B 3/08 (2013.01); C22B 3/20 (2013.01); C22B 3/44 (2013.01); C22B 7/007 (2013.01); C22B 23/0453 (2013.01); C22B 23/0461 (2013.01); C22B 34/32 (2013.01); C23G 1/36 (2013.01); C01P 2006/80 (2013.01); Y02P 10/20 (2015.11)
Citation (search report)
See references of WO 2010051992A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010051992 A1 20100514; EP 2366036 A1 20110921; IT 1393792 B1 20120508; IT VA20080056 A1 20100507
DOCDB simple family (application)
EP 2009007925 W 20091102; EP 09767938 A 20091102; IT VA20080056 A 20081106