EP 1994190 A4 20101117 - HEMATITE PRECIPITATION AT ELEVATED TEMPERATURE AND PRESSURE
Title (en)
HEMATITE PRECIPITATION AT ELEVATED TEMPERATURE AND PRESSURE
Title (de)
FÄLLUNG VON HÄMATIT BEI ERHÖHTER TEMPERATUR UND ERHÖHTEM DRUCK
Title (fr)
PRECIPITATION D'HEMATITE A HAUTE TEMPERATURE ET HAUTE PRESSION
Publication
Application
Priority
- AU 2007000210 W 20070223
- AU 2006900934 A 20060224
Abstract (en)
[origin: WO2007095689A1] A hydrometallurgical method (10) for precipitating iron as hematite at elevated temperature and pressure from a pregnant leach solution ("PLS") (12) containing nickel, cobalt and iron, the method comprising the steps of: (i) leaching a low to medium grade nickel laterite ore to produce a PLS (12) containing nickel, cobalt and ferric iron; (ii) subjecting the PLS (12) to elevated temperatures and pressures for a time sufficient to precipitate iron as hematite; (iii) passing the product of step (ii) through a solids/liquid separation circuit (26) to substantially remove the hematite precipitate, and produce a substantially iron-free, acid containing solution; and (iv) recovering nickel and cobalt from the final substantially iron-free, acid containing solution.
IPC 8 full level
C22B 3/20 (2006.01); C22B 23/00 (2006.01)
CPC (source: EP)
C22B 23/043 (2013.01); C22B 23/0461 (2013.01)
Citation (search report)
- [X] US 2006024224 A1 20060202 - NEUDORF DAVID [CA], et al
- [X] US 2006002835 A1 20060105 - NEUDORF DAVID [CA]
- [A] US 3804613 A 19740416 - TAYLOR M, et al
- [A] US 4093526 A 19780606 - BLANCO JORGE L, et al
- [A] US 6391089 B1 20020521 - CURLOOK WALTER [CA]
- See references of WO 2007095689A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL MK
DOCDB simple family (publication)
WO 2007095689 A1 20070830; AU 2007219059 A1 20070830; AU 2007219059 B2 20100826; BR PI0707021 A2 20110412; CA 2641919 A1 20070830; EP 1994190 A1 20081126; EP 1994190 A4 20101117; ZA 200807098 B 20090826
DOCDB simple family (application)
AU 2007000210 W 20070223; AU 2007219059 A 20070223; BR PI0707021 A 20070223; CA 2641919 A 20070223; EP 07701539 A 20070223; ZA 200807098 A 20080818