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1. (WO2019048790) METHOD FOR SEPARATING PALLADIUM FROM OTHER METAL ELEMENTS PRESENT IN AN AQUEOUS NITRIC PHASE USING SPECIFIC MALONAMIDES AS EXTRACTANTS
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Pub. No.: WO/2019/048790 International Application No.: PCT/FR2018/052183
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
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE [FR/FR]; 3 rue Michel Ange 75794 PARIS CEDEX 16, FR
Inventors:
BOURGEOIS, Damien; FR
MEYER, Daniel; FR
BRAIBANT, Bertrand; FR
Agent:
AUGARDE, Eric; FR
Priority Data:
17 5824107.09.2017FR
Title (EN) METHOD FOR SEPARATING PALLADIUM FROM OTHER METAL ELEMENTS PRESENT IN AN AQUEOUS NITRIC PHASE USING SPECIFIC MALONAMIDES AS EXTRACTANTS
(FR) PROCÉDÉ DE SÉPARATION DU PALLADIUM DES AUTRES ÉLÉMENTS MÉTALLIQUES PRÉSENTS DANS UNE PHASE AQUEUSE NITRIQUE UTILISANT COMME EXTRACTANTS DES MALONAMIDES PARTICULIERS
Abstract:
(EN) The present invention concerns a method for separating palladium from other metal elements contained in an aqueous nitric phase, consisting of (i) placing an aqueous nitric phase containing, in addition to palladium, at least one other metallic cation the valence of which is greater than or equal to 2, in contact with an organic phase that is immiscible with water, then (ii) separating the aqueous nitric phase and the organic phase in which the palladium has been extracted, said organic phase containing, as extractant, at least one malonamide comprising no sulfur atoms, of formula (I): R1(R2)N-C(=0)-CH2-C(=0)-N(R3)R4 (I) in which the groups R1, R2, R3 and R4, identical or different, represent an alkyl, a heteroalkyl or an arylalkyl, said alkyl, heteroalkyl and arylalkyl comprising no sulfur atoms and each having at least 5 carbon atoms.
(FR) La présente invention concerne un procédé de séparation du palladium des autres éléments métalliques contenus dans une phase aqueuse nitrique consistant (i) à mettre en contact une phase aqueuse nitrique contenant, en plus du palladium, au moins un autre cation métallique dont la valence est supérieure ou égale à 2 avec une phase organique non miscible à l'eau puis (ii) à séparer la phase aqueuse nitrique et la phase organique dans laquelle du palladium a été extrait, ladite phase organique contenant, en tant qu'extractant, au moins un malonamide exempt d'atome de soufre de formule (I) : R1(R2)N-C(=0)-CH2-C(=0)-N(R3)R4 (I) dans laquelle les groupements R1, R2, R3 et R4, identiques ou différents, représentent un alkyle, un hétéroalkyle ou un arylalkyle, lesdits alkyle, hétéroalkyle et arylalkyle étant exempt d'atome de soufre et présentant chacun au moins 5 atomes de carbone.
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)