Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Platinum group metal
Patent
1989-11-06
1992-01-07
Bond, Robert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Platinum group metal
75313, 75713, 75722, 210688, 210912, 210913, 210914, 423 24, 423 46, 423 54, 423 63, 423100, 423139, 546 14, C01G 5500, G07F 718
Patent
active
050789783
ABSTRACT:
A method is disclosed for the quantitative removal and concentration of desired transition metal ions from a source solution which may contain larger concentrations of other metal and H.sup.+ ions. The method comprises bringing the source solution into contact with a compound comprising a pyridine containing ligand covalently bonded through an organic spacer silicon grouping to a solid inorganic support. The pyridine portion(s) of the compound has an affinity for the desired metal ions to form a complex thereby removing the desired metal ions from the source solution. The desired metal ions are removed from the compound by contacting the compound with a much smaller volume of a receiving solution having a greater affinity for the desired metal ions than does the pyridine ligand portion of the compound. The concentrated metal ions thus removed may be recovered by known methods. The process is useful in removing unwanted metal ions from water streams and in the treatment of waste streams such as those containing metal ions from emulsions found in the treatment of photographic and x-ray films. The invention is also drawn to novel intermediates comprising pyridine containing ligands covalently bonded through a spacer grouping to a silane and to the final compounds formed by reacting the intermediates with a hydrophilic inorganic solid support material.
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Bradshaw Jerald S.
Bruening Ronald L.
Izatt Reed M.
Krakowiak Krzysztof E.
Tarbet Bryon J.
Bond Robert T.
Brigham Young University
Crellin Terry M.
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