Chelating resins in metal recovery

C - Chemistry – Metallurgy – 22 – B

Patent

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Details

C22B 3/42 (2006.01) C22B 3/24 (2006.01) C22B 23/00 (2006.01)

Patent

CA 2640479

The present invention relates to the use of monodisperse, macroporous chelating resins in metal winning in hydrometallurgical processes, in particular in resin-in-pulp processes. According to the invention, the monodisperse, macroporous chelating resins have a mean bead diameter in the range 0.35-1.5 mm, preferably 0.45-1.2 mm and particularly preferably 0.55-1.0 mm. The application also provides a process for preparing monodisperse, macroporous chelating resins having weak base groups, in particular picolinamino groups. The monodisperse chelating resins are able to remove, for example, nickel and cobalt ions in relatively large amounts from a leach suspension as heterodisperse chelating resins.

La présente invention concerne l'utilisation de résines de chélate monodispersées, macroporeuses dans la récupération de métaux dans des procédés hydrométallurgiques, notamment dans les procédés dits de Resin in Pulp. Les résines de chélate monodispersées et macroporeuses selon l'invention présentent un diamètre de particule moyen compris entre 0,35 et 1,5 mm, notamment entre 0,45 et 1,2 mm, et particulièrement de préférence entre 0,55 et 1,0 mm. L'invention concerne également un procédé de fabrication de résines de chélate monodispersées et macroporeuses comportant des groupements basiques faibles, notamment des groupements picolinamino. Les résines de chélate monodispersées sont par exemple capables d'extraire des ions nickel et cobalt en quantités importantes de suspensions basiques, sous forme de résines de chélate hétérodispersées.

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