抄録
The extraction equilibrium of molybdenum(VI) from nitric, hydrochloric and sulfuric acid solution with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester dissolved in w-heptane was examined at 303 K. It was clarified that molybdenum(VI) was extracted with the extractant (HR) according to the following equation, in low concentration range of the metal.
MoO2+2+2(HR)2→←MoO2R2·2HR+2H+
The extraction equilibrium constants were obtained. The experimental results were interpreted quantitatively by taking account of the equilibrium concentration of a cationic species of molybdenum(VI) in aqueous solution.
