EP 2640862 A1 20130925 - PROCESS FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES
Title (en)
PROCESS FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES
Title (de)
VERFAHREN ZUR EXTRAKTION VON ALUMINIUM AUS ALUMINIUMERZEN
Title (fr)
PROCÉDÉ D'EXTRACTION D'ALUMINIUM À PARTIR DE MINERAIS ALUMINEUX
Publication
Application
Priority
- US 41547310 P 20101119
- CA 2011001271 W 20111118
Abstract (en)
[origin: WO2012065253A1] There is provided a method for extracting aluminum ions from aluminous ores, such as argillite. The process comprises leaching the argillite with an acid such as HCI so as to obtain a composition comprising the aluminum ions and iron ions; at least partially removing the iron ions from the composition by substantially selectively precipitating the iron at a pH of about 3 to about 6 by adding a base and at least partially removing the precipitated iron ions so as to obtain an Al-rich composition; and optionally purifying the Al-rich composition by adding a base for substantially selectively selectively precipitating the aluminum ions, by means of a hollow fiber membrane, or by a liquid-liquid extraction.
IPC 8 full level
C22B 21/00 (2006.01); C22B 3/10 (2006.01); C22B 3/22 (2006.01); C22B 3/26 (2006.01)
CPC (source: EP US)
C22B 3/10 (2013.01 - US); C22B 3/22 (2013.01 - EP US); C22B 3/26 (2021.05 - EP US); C22B 3/44 (2013.01 - EP US); C22B 21/0007 (2013.01 - EP US); C22B 21/0015 (2013.01 - EP US); Y02P 10/20 (2015.11 - EP US)
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012065253 A1 20120524; AU 2011331861 A1 20130418; CA 2812309 A1 20120524; CA 2812309 C 20141209; EP 2640862 A1 20130925; EP 2640862 A4 20170621; US 2013233130 A1 20130912
DOCDB simple family (application)
CA 2011001271 W 20111118; AU 2011331861 A 20111118; CA 2812309 A 20111118; EP 11841479 A 20111118; US 201113885922 A 20111118