Method for eluting a metal adsorbed on a chelating agent
AssigneeSumitomo Chemical Company, Limited
InventorsYushin Kataoka, Masaaki Matsuda, Masahiro Aoi
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Abstract
A method for eluting a metal adsorbed on a chelating agent with an eluent, which comprises using as the eluent an aqueous solution containing a water-soluble inorganic sulfide and a basic compound at concentrations of 0.005 to 3N and 0.1N or more, respectively.
Claims4
In a method for eluting a metal selected from the group consisting of gallium, palladium, germanium, uranium, gold and platinum adsorbed on a chelate resin having at least one functional group selected from the group consisting of .dbd.NOH, --P(OR).sub.2, --P(OR).sub.2, --PH(OR).sub.3, --N(R).sub.2 and --NR.sup.+.sub.3, wherein R may be the same or different and represents hydrogen, phenyl, alkyl or alkenyl, with an eluant, the improvement comprising using as the eluant an aqueous solution containing:
- (a) a water soluble inorganic sulfide selected from the group consisting of hydrogen sulfide, alkali metal sulfide, alkaline earth metal sulfide, ammonium sulfide, alkali metal hydrogensulfide and ammonium hydrogen-sulfide at concentrations of 0.005 to 3N, and
- (b) a basic compound selected from the group consisting of an inorganic alkali compound and a water soluble organic amine at concentrations of 0.1N or more.
Dependencies are inferred from the claim text.