Recovery of metals adsorbed on chelating agents

Details Recovery of metals adsorbed on chelating agents Recovery of metals adsorbed on chelating agents

C - Chemistry, Metallurgy

22

B

53/374

C22B 3/44 (2006.01) C22B 3/46 (2006.01) C22B 60/02 (2006.01)

Patent

CA 1286115

ABSTRACT RECOVERY OF METALS ADSORBED ON CHELATING AGENTS Chelating agents on which metals such as uranium have been adsorbed are brought into contact with an eluent of aqueous solution containing reducing agents and basic compounds, until the metals are eluted. The elution is effected with large speed without degradation of the chelating agents. Preferred chelating agents are rather stable under basic conditions but not under acidic conditions, for example, those having =NOH group in their molecules. The reducing agents and basic compounds in the eluent are, for example, sulfurous acid or salts thereof and sodium hydroxide, respectively.

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