EXTRACTION EQUILIBRIUM OF MOLYBDENUM(VI) WITH 2-ETHYLHEXYL PHOSPHONIC ACID MONO-2-ETHYLHEXYL ESTER

[摘要] References(21)Cited-By(17)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.

[关键词] Extraction;Equilibrium;Rare Metal;Molybdenum;PC-88A