C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/26 (2006.01) C22B 3/30 (2006.01)
Patent
CA 2220452
A process using gas sparging for removing and recovering ammonia from the organic extraction phase in a metal liquid-liquid extraction process in which at least one ammoniacal aqueous solution (either a leach feed solution containing the metal to be extracted or an aqueous stripping solution employed to strip the metal values from the organic phase) is contacted with the organic phase which comprises a water insoluble, water immiscible hydrocarbon solvent solution of a water insoluble organic extractant for the metal.
L'invention porte sur un procédé mettant en oeuvre le principe du barbotage au gaz pour séparer de l'ammoniaque, et la récupérer, d'une phase organique d'extraction dans un processus d'extraction de métal liquide-liquide, dans lequel au moins une solution ammoniacale aqueuse (une solution d'alimentation lixiviante contenant le métal à extraire ou une solution de réextraction aqueuse utilisée pour retirer les métaux de valeur de la phase organique) entre en contact avec la phase organique comprenant une solution à solvant hydrocarbure, insoluble dans l'eau et non miscible à l'eau, d'un agent d'extraction organique du métal insoluble dans l'eau.
Henkel Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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