The Extraction Separation of Sc(III) from a Simulated Solution of Waste Water by Using O,O-bis(2-ethylhexyl) Hydrogen Thiophosphate

抄録

No primary scandium (Sc) ore exists on the earth and therefore securing a stable supply of Sc is required. The authors reported previously that a hexane solution containing 0.1 mol dm^-3 of O,O-bis(2-ethylhexyl) hydrogen thiophosphate (MSP-8^®) could extract Sc(III) quantitatively from an aqueous solution containing 1.0 mol dm^-3 of zirconyl (ZrO(II)) and 0.10 mol dm^-3 of tripotassium citrate as a masking reagent. The present study was carried out in order to establish the liquid-liquid extraction separation of Sc from a simulated waste water produced in the zirconium (Zr) refinery by using MSP-8 as the extractant.