B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
134/39, 362/47
B01J 20/24 (2006.01) B01D 15/00 (2006.01) B01J 20/32 (2006.01) C02F 1/28 (2006.01) C07F 7/00 (2006.01) C07F 15/04 (2006.01)
Patent
CA 2114553
A method for the removal and concentration of desired ions such as Pd(II), Pt(IV), Pt(II), Pd(IV), Ru(III), Ru(II), Au(III), Os(IV), Au(I), Cu(I), Cu(II), Ag(I), and Hg(II) from a multiple ion source solution which may contain larger concentrations of other undesired ions including H+ comprises bringing the source solution into contact with a compound comprising a thiol and/or thioether aralkyl nitrogen-containing ligand covalently bonded through an organic spacer silicon grouping to a solid inorganic support. The thiol and/or thioether aralkyl nitrogen-containing ligand portion(s) of the compound has an affinity for the desired ions to form a complex thereby removing the desired ions from the source solution. The desired ions are re- moved from the compound by contacting the compound with a much smaller volume of a receiving solution having a grea- ter affinity for the desired ions than does the thiol and/or thioether aralkyl nitrogen-containing ligand portion of the com- pound. The process is useful in removing desired or unwanted ions from Rh and Ir concentrates, acidic waste streams, multiple platinum group metal refining streams, and other industrial or environmental streams. The invention is also drawn to the thiol and/or thioether aralkyl nitrogen-containing ligands covalently bonded through a spacer grouping to a hydro- philic inorganic solid support material. The preferred aralkyl group is benzyl.
Bradshaw Jerald S.
Bruening Ronald L.
Izatt Reed M.
Tarbet Bryon J.
Brigham Young University
Smart & Biggar
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