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1. (WO1991008318) METAL OXIDE PRODUCTION BY LEACHING AND HYDROLYSIS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/008318 International Application No.: PCT/AU1990/000568
Publication Date: 13.06.1991 International Filing Date: 27.11.1990
Chapter 2 Demand Filed: 28.06.1991
IPC:
C01G 30/00 (2006.01) ,C22B 3/14 (2006.01) ,C22B 3/22 (2006.01) ,C22B 30/02 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
G
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F94
30
Compounds of antimony
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
04
by leaching
12
in inorganic alkaline solutions
14
containing ammonia or ammonium salts
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
20
Treatment or purification of solutions, e.g. obtained by leaching
22
by physical processes, e.g. by filtration, by magnetic means
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
30
Obtaining antimony, arsenic or bismuth
02
Obtaining antimony
Applicants:
MINERAL PROCESS TECHNOLOGY PTY LTD [AU/AU]; Level 24 Central Plaza 1 345 Queen Street Brisbane, QLD 4000, AU (AllExceptUS)
ROYSTON, David [AU/AU]; AU (UsOnly)
Inventors:
ROYSTON, David; AU
Agent:
GRANT ADAMS & COMPANY; 144 Edward Street G.P.O. Box 1413 Brisbane, QLD 4000, AU
Priority Data:
PJ 765501.12.1989AU
Title (EN) METAL OXIDE PRODUCTION BY LEACHING AND HYDROLYSIS
(FR) PRODUCTION D'OXYDES DE METAL PAR LIXIVIATION ET HYDROLYSE
Abstract:
(EN) The invention is directed to the processing of mineral ores, particularly to the production of metal oxides from metal sulphides, especially antimony sulphides. The process is of the type whereby the ore is first leached by a suitable lixiviant and the thus-leached material is susbsequently subjected to hydrolysis, the improvement comprising first separating the leached material from the lixiviant before the hydrolysis is undertaken. This separation is preferably achieved by crystallization. This improved process requires the use of less noxious and relatively inexpensive reagents, reaction conditions are less extreme, it is possible to recycle a significant quantity of reagents/solvents, a more reactive intermediate product is achieved, the final product is of a high quality and the secondary products are also of commercial value.
(FR) L'invention se rapporte au traitement de minerais, en particulier pour la production d'oxydes de métal à partir de sulphures métalliques, telles que notamment des sulphures d'antimoine. Ce procédé de production consiste d'abord à lessiver le minerai au moyen d'un agent de lixiviation approprié et à soumettre ensuite le matériau ainsi lessivé à une hydrolyse, l'amélioration consistant dans la séparation préalable du matériau lessivé de l'agent de lixiviation avant que l'hydrolyse soit effectuée. Cette séparation est de préférence effectuée par cristallisation. Ce procédé amélioré est avantageux pour les raisons suivantes: il nécessite l'utilisation de réactifs moins nocifs et relativement peu coûteux, les conditions de réaction sont moins extrêmes, il est possible de recycler une quantité importante des réactifs/solvants, un produit intermédiaire plus réactif est obtenu, le produit final est d'une qualité élevée et les prooduits secondaires ont également une valeur commerciale.
Designated States: AU, JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1990067489