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1. WO2020061639 - METHOD FOR PREPARING A HIGH-PURITY HYDRATED NICKEL SULPHATE

Publication Number WO/2020/061639
Publication Date 02.04.2020
International Application No. PCT/AU2019/051044
International Filing Date 26.09.2019
IPC
C22B 3/44 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
20Treatment or purification of solutions, e.g. obtained by leaching
44by chemical processes
C22B 23/00 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
23Obtaining nickel or cobalt
B01D 11/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
04of solutions which are liquid
CPC
C01G 53/10
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
53Compounds of nickel
10Sulfates
C22B 23/0461
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
23Obtaining nickel or cobalt
04by wet processes
0453Treatment or purification of solutions, e.g. obtained by leaching
0461by chemical methods
C22B 23/0476
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
23Obtaining nickel or cobalt
04by wet processes
0476Separation of nickel from cobalt
C22B 3/0005
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
0004Treatment or purification of solutions, e.g. obtained by leaching
0005by liquid-liquid extraction using organic compounds, e.g. acyclic or carbocyclic compounds, heterocyclic compounds, organo- metallic compounds, alcohols, ethers, or the like
C22B 3/0098
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
0004Treatment or purification of solutions, e.g. obtained by leaching
0098by ion exchange extraction or by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/42
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
20Treatment or purification of solutions, e.g. obtained by leaching
42by ion-exchange extraction
Applicants
  • IGO LIMITED [AU]/[AU]
Inventors
  • OSTEN, Karel John
  • GRASSI, Rossano Antonio
  • GUTIERREZ CLAUSDORFF, Arturo
  • HARRISON, Ryan Colin
Agents
  • WRAYS PTY LTD
Priority Data
201890364327.09.2018AU
201990176023.05.2019AU
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR PREPARING A HIGH-PURITY HYDRATED NICKEL SULPHATE
(FR) PROCÉDÉ POUR LA PRÉPARATION D'UN SULFATE DE NICKEL HYDRATÉ DE HAUTE PURETÉ
Abstract
(EN)
A method for recovering NiSO4.6H2O crystals from a nickel rich organic phase is provided. The method includes contacting a nickel rich organic phase with an aqueous strip solution of sufficient H2SO4 concentration to extract nickel from the organic phase and of sufficient Ni2+ concentration to precipitate NiSO4.6H2O crystals and form a nickel lean organic phase. Also provided are methods for recovering NiSO4.6H2O crystals that include preceding processing steps, including low temperature pressure oxidation (LTPOX) autoclaving of a nickel sulphide concentrate to afford a pregnant leach solution (PLS).
(FR)
L'Invention concerne un procédé pour la récupération de cristaux de NiSO4.6H2O à partir d'une phase organique riche en nickel. Le procédé comprend la mise en contact d'une phase organique riche en nickel avec une solution aqueuse d'extraction ayant une concentration en H2SO4 suffisante pour extraire du nickel de la phase organique et ayant une concentration en Ni2+ suffisante pour faire précipiter des cristaux de NiSO4.6H2O et former une phase organique pauvre en nickel. L'invention concerne également des procédés pour la récupération de cristaux de NiSO4.6H2O qui comprennent les étapes de traitement ci-dessus, comprenant un autoclavage pour l'oxydation sous pression à basse température (LTPOX) d'un concentré de sulfure de nickel pour obtenir une solution de lixiviation enrichie (PLS).
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