Treating rhodium, iridium and ruthenium solutions

Details Treating rhodium, iridium and ruthenium solutions Treating rhodium, iridium and ruthenium solutions

C - Chemistry, Metallurgy

07

F

C07F 7/10 (2006.01) B01D 15/00 (2006.01) B01J 20/32 (2006.01) B01J 41/20 (2006.01) B01J 45/00 (2006.01) C07F 7/28 (2006.01) C07F 15/04 (2006.01) C22B 3/44 (2006.01) C22B 11/00 (2006.01)

Patent

CA 2103144

2103144 9221419 PCTABS00017 A method for the removal, separation, and concentration of Rh, Ir, and/or Ru from a source solution which may contain larger concentrations of other ions including H+ comprises bringing the source solution into contact with a compound comprising a polyalkylene-polyamine-containing ligand covalently bonded through an organic spacer silicon grouping to a solid inorganic support. The ligand portion(s) of the compound has affinity for complexed anionic species of Rh, Ir, and/or Ru. The Rh and/or Ru are first selectively removed from the compound through contact with a much smaller volume of a first receiving solution. The Ir is then removed from the compound through contact with a much smaller volume of a second receiving solution having a greater affinity for the Ir than the liquid portion of the compound or having a greater affinity for the ligand portion of the compound than the Ir species. The process is useful in the recovery and refining of the valuable Rh and Ir from a variety of sources. The invention is also drawn to the particular highly stable branched polyalkylene-polyamine-containing ligands covalently bonded through a spacer grouping to a hydrophilic inorganic solid support material.

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