Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution
AssigneeKawasaki Kasei Chemicals Ltd.
InventorsTatsuya Sakurai, Hiroshi Fujimura, Koji Kusabe, Keishiro Hata
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Abstract
An agent for treating metal ions in an aqueous solution, comprising a solid porous carrier and, supported thereon, an organic reagent (hereinafter referred to as a "redox reagent") which is capable of converting metal ions (inclusive of metal complex ions) contained in an aqueous solution to zero valent metal or monovalent metal ions by a redox reaction and which is capable of carrying out oxidation-reduction reversibly.
Claims24
An agent for treating metal ions in an aqueous solution, comprising a solid porous carrier and, supported thereon, an organic reagent (hereinafter referred to as a "redox reagent") which is capable of converting metal ions (inclusive of metal complex ions) contained in an aqueous solution to zero valent metal or monovalent metal ions by a redox reaction and which is capable of carrying out oxidation-reduction reversibly.
A method for treating metal ions in an aqueous solution, which comprises recovering silver thiosulfate complex ions from an aqueous solution containing them by capturing them in the form of silver metal on a metal ion-treating agent having an anthrahydroquinone compound supported on active carbon, wherein the pH of the aqueous solution is adjusted at a level of at least 7.
Dependencies are inferred from the claim text.