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1. (WO2019048789) IMPROVED METHOD FOR RECOVERING PALLADIUM FROM OTHER METAL ELEMENTS PRESENT IN A NITRIC AQUEOUS PHASE USING MALONAMIDES AS EXTRACTANTS
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Pub. No.: WO/2019/048789 International Application No.: PCT/FR2018/052182
Publication Date: 14.03.2019 International Filing Date: 06.09.2018
IPC:
C22B 3/26 (2006.01) ,C22B 3/00 (2006.01)
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
26
by liquid-liquid extraction using organic compounds
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
Applicants:
COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES [FR/FR]; Bat le Ponant 25 rue Leblanc 75015 PARIS, FR
Inventors:
BOURGEOIS, Damien; FR
MEYER, Daniel; FR
Agent:
AUGARDE, Eric; FR
Priority Data:
17 5824007.09.2017FR
Title (EN) IMPROVED METHOD FOR RECOVERING PALLADIUM FROM OTHER METAL ELEMENTS PRESENT IN A NITRIC AQUEOUS PHASE USING MALONAMIDES AS EXTRACTANTS
(FR) PROCÉDÉ AMÉLIORÉ DE RÉCUPÉRATION DU PALLADIUM DES AUTRES ÉLÉMENTS MÉTALLIQUES PRÉSENTS DANS UNE PHASE AQUEUSE NITRIQUE UTILISANT COMME EXTRACTANTS DES MALONAMIDES
Abstract:
(EN) The present invention relates to a method for recovering palladium from a nitric aqueous phase comprising a nitric acid concentration of at most 3 mol.L-1 and which contains, in addition to the palladium, at least one other metal cation having a valence no lower than 2, said method comprising a step of extraction by an organic phase comprising at least one malonamide that is free of sulphur atoms as an extractant, at least one step of washing the organic phase by an aqueous phase with an O/E ratio no lower than 4 and a step of back-extracting the palladium by an aqueous solution.
(FR) La présente invention concerne un procédé de récupération du palladium à partir d'une phase aqueuse nitrique comprenant une concentration en acide nitrique d'au plus de 3 mol.L -1 et qui contient, en plus du palladium, au moins un autre cation métallique dont la valence est supérieure ou égale à 2, ledit procédé comprenant une étape d'extraction par une phase organique comprenant au moins un malonamide exempt d'atome de soufre en tant qu' extractant, au moins une étape de lavage de la phase organique par une phase aqueuse avec un rapport O/A supérieur ou égal à 4 et une étape de désextraction du palladium par une solution aqueuse.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)