Fixation of dissolved metal species with a complexing agent
AssigneesPedro B. Macedo, Theodore A. Litovitz
InventorsPedro B. Macedo, Aaron Barkatt
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Abstract
A process for removing metal species from solution comprising passing the liquid over a composition comprising a support such as a porous silicate glass or silica gel or charcoal having interconnected pores and containing water soluble amine complexing agents absorbed on the support capable of forming a stable complex with the metal species. The preferred amine complexing agent is triethylenetetramine. The process is especially useful for removing radioactive cobalt from liquid waste streams.
Claims26
A process for removing metal species of Group IVb through Group IIIa, inclusive, of the Periodic Table from a liquid containing said metal species which comprises treating a porous support having interconnected pores, said porous support being silicate glass or silica gel having an internal surface covered by silicon-bonded hydroxyl groups, with an amine complexing agent capable of forming a stable complex with said metal species whereby the internal surface of said porous support contains said amine complexing agent, said amine complexing agent being a neutral or basic water soluble alkylene amine having 2 to 5 amine groups, said amine complexing agent being present in said porous support in an amount effective to complex the metal species and form a complex between said amine complexing agent and said metal species, and passing said liquid over said porous support in a packed column to form a complex between said amine complexing agent and said metal species.
A process for removing metal species of Group IVb through Group IIIa, inclusive, of the Periodic Table from a liquid containing said metal species which comprises passing said liquid over a composition in a packed column comprising a porous support having interconnected pores, said porous support being charcoal having an internal surface containing an amine complexing agent capable of forming a stable complex with said metal species, said amine complexing agent being a neutral or basic water soluble alkylene amine having 2 to 5 amine groups, said amine complexing agent being present in an amount effective to complex the metal species and form a complex between the amine complexing agent of said composition and said metal species.
Dependencies are inferred from the claim text.