Enhancement of Acid-Stripping Rate of Beryllium(II) Chelate in Carbon Tetrachloride by Addition of 4-Methyl-2-pentanone

Abstract

Rate of stripping of beryllium(II) extracted into carbon tetrachloride from aqueous solution as benzoylacetonate chelate by perchloric and nitric acid was enhanced when 4-methyl-2-pentanone was added to this solvent. This was explained in terms of a change in the reaction route. When the organic phase was carbon tetrachloride, the chelate in the organic phase was partially washed into the aqueous phase and underwent dissociation into the metal ion and this reaction in the aqueous phase controlled the stripping of the chelate. However, when 4-methyl-2-pentanone was added, part of the acid in the aqueous phase was extracted and the dissociation of the chelate also took place in the organic phase. This reaction in the organic phase enhanced the rate of stripping.