Aa. Mhaske et Pm. Dhadke, Extraction separation studies of Rh, Pt and Pd using Cyanex 921 in toluene- a possible application to recovery from spent catalysts, HYDROMETALL, 61(2), 2001, pp. 143-150
Liquid-liquid extraction of rhodium, platinum and palladium with Cyanex 921
from aqueous hydrochloric acid media has been examined in the absence and
in the presence of tin(II) chloride. In order to facilitate the separation
of these individual metal ions from their mixtures, the extraction of each
metal ion was studied separately, under the influence of variables such as:
hydrochloric acid concentration, tin(II) chloride concentration, reagent c
oncentration, equilibration time and stripping agents.
Thereafter, the method developed was applied to the recovery of these metal
ions from a synthetic solution similar in composition to that expected fro
m the leaching of spent catalysts in 6.0 M hydrochloric acid. (C) 2001 Else
vier Science B.V. All rights reserved.