Patent ID: 8529850

Claim:
A method for the recovery of metal from a metal-containing aqueous solution at an elevated temperature, the method comprising: contacting the metal-containing aqueous solution with an organic phase comprising a water immiscible solvent and a reagent composition comprising a ketoxime having a structure represented by: wherein R 5 is a C 1-22 linear or branched alkyl group; R 1 is a C 1-22 linear or branched alkyl or alkenyl group, a C 6 aryl group or a C 7-22 aralkyl group; R 2 -R 4 are each independently hydrogen, halogen, a linear or branched C 6-12 alkyl group, OR 6 wherein R 6 is a C 1-22 linear or branched alkyl group, a C 2-22 linear or branched alkenyl group, a C 6 aryl group, or a C 7-22 aralkyl group to extract at least a portion of the metal into the organic phase to provide a metal-pregnant organic phase and a metal-barren aqueous phase; separating the resultant metal-pregnant organic phase from the metal-barren aqueous phase; and recovering metal from the metal-pregnant organic phase.