28-11-2019 дата публикации
Номер: US20190360071A1
Принадлежит:
Disclosed is a process for extracting or separating metal ions using a composition including: an ionic liquid of formula C,-X, in which: C is an onium cation including at least one hydrocarbon chain Rincluding from 6 to 20 carbon atoms; X− is an anion of charge p, the ionic liquid having a solubility in water at 20° C. of at least 10 g/l; an acid; and water. The composition includes two liquid phases: a phase enriched in ionic liquid ϕ; and a phase enriched in water ϕ, the pH of which is less than or equal to 4.7. The composition is useful for extracting a metal ion from an acidic aqueous medium including a metal ion, for separating metal ions from an aqueous medium including at least two metal ions or for purifying an acidic aqueous solution including a metal ion. 113-. (canceled)14. Method for extracting a metal ion M from a medium , comprising the steps of:{'sup': +', 'p−, 'sub': '1/p', 'claim-text': [{'sup': +', '1', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22, 'C is an onium cation comprising at least one atom selected from N, S, P or O, the onium cation comprising at least one hydrocarbon chain Rcomprising from 6 to 20 carbon atoms, optionally interrupted by one or more groups selected from —S—, —O—, —(C═O)—O—, —O—(C═O)—, —NR—(C═O)—, —(C═O)—NR— or —NRR—, and/or optionally substituted with one or more groups selected from halogen, —OR, —(C═O)R, —(C═O) NRR—, —NRRR, —S—R, —(C═O)—OR, wherein R, R, R, R, R, R, R, R, R, R, Rand Rindependently represent H or a linear or branched hydrocarbon chain comprising from 1 to 6 carbon atoms and Rrepresents a linear or branched hydrocarbon chain comprising from 1 to 6 carbon atoms, and'}, {'sup': 'p−', 'X is an anion charge of p,'}, 'the ionic liquid having a solubility in water at 20° C. of at least 10 g/L,', {'sub': 'i', 'with an aqueous medium comprising a metal ion M and an acid, wherein a composition is obtained ...
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