Removal of 3-mercapto-4-methyl-2-pentanone from zirconium/hafnium separation processes
AssigneeTeledyne Industries, Inc.
InventorsLawrence J. Jacoby, Richard A. Rosenau, Dorothy P. Carter, Ralph H. Nielsen, Kenneth C. Ash
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Abstract
A method of essentially preventing the formation of 3-mercapto-4-methyl-2-pentanone by selectively controlling an ammonium thiocyanate-methyl isobutyl ketone regeneration system by maintaining the pH in the range of 4 to 9, and the temperature below 150.degree. F.
Claims4
In a methyl isobutyl ketone liquid-liquid extraction method for separating zirconium from hafnium wherein ammonium thiocyanate is used as a complexing agent and wherein 3-mercapto-4-methyl-2-pentanone is formed in the ammonium thiocyanate-methyl isobutyl ketone regeneration process the improvement comprising preventing the formation of 3-mercapto-4-methyl-2-pentanone in said regeneration process comprising maintaining a pH of from 4 to 9 and a temperature below 150.degree. F.
Dependencies are inferred from the claim text.