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1. WO1992016667 - OXIDATION OF METAL SULFIDES USING THERMOTOLERANT BACTERIA

Publication Number WO/1992/016667
Publication Date 01.10.1992
International Application No. PCT/AU1992/000117
International Filing Date 20.03.1992
Chapter 2 Demand Filed 21.10.1992
IPC
C22B 3/18 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
18with the aid of microorganisms or enzymes, e.g. bacteria or algae
CPC
C22B 3/18
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
3Extraction of metal compounds from ores or concentrates by wet processes
18with the aid of microorganisms or enzymes, e.g. bacteria or algae
Y02P 10/20
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
20Recycling
Y10S 423/17
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
423Chemistry of inorganic compounds
09Reaction techniques
17Microbiological reactions
Applicants
  • BAC TECH (AUSTRALIA) PTY. LTD. [AU]/[AU] (AllExceptUS)
  • SPENCER, Peter, Andrew [AU]/[AU] (UsOnly)
  • BUDDEN, Julia, Rose [AU]/[AU] (UsOnly)
  • BARRETT, Jack [GB]/[GB] (UsOnly)
  • HUGHES, Martin, Neville [GB]/[GB] (UsOnly)
  • POOLE, Robert, Keith [GB]/[GB] (UsOnly)
Inventors
  • SPENCER, Peter, Andrew
  • BUDDEN, Julia, Rose
  • BARRETT, Jack
  • HUGHES, Martin, Neville
  • POOLE, Robert, Keith
Agents
  • LORD, Kelvin, Ernest
Priority Data
PK 520422.03.1991AU
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OXIDATION OF METAL SULFIDES USING THERMOTOLERANT BACTERIA
(FR) OXYDATION DE SULFURES DE METAL A L'AIDE DE BACTERIES RESISTANTES A LA CHALEUR
Abstract
(EN)
A process for recovering precious or base metals from particulate refractory sulfide materials comprises: a) contacting the sulfide material with an aqueous solution containing a thermotolerant bacteria culture capable of promoting oxidation of the sulfide material at a temperature in the range from 25 to 55 °C, b) separating the oxidized residue from the aqueous liquid, and, c) treating the oxidized residue and/or the aqueous liquid to recover metal. In this context, a thermotolerant bacterium is one which has an optimum growth temperature of 40 to 45 °C, and an operating temperature of 25 to 55 °C.
(FR)
Procédé de récupération de métaux précieux ou de métaux de base dans certaines matières sulfureuses réfractaires, comprenant les étapes suivantes: a) exposition de la matière sulfureuse à une solution aqueuse contenant une culture de bactéries résistantes à la chaleur, capables de favoriser l'oxydation de la matière sulfureuse à une température se situant entre 25 et 55 °C; b) séparation du résidu oxydé de la solution aqueuse et c) traitement du résidu oxydé et/ou de la solution aqueuse pour la récupération du métal. Dans ce contexte, une bactérie résistante à la chaleur est une bactérie dont la température optimale de croissance est de 40 à 45 °C et la température opérationnelle de 25 à 55 °C.
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