CAJ | 학술논문

首次研究了一种新型萃取剂仲辛基苯氧基乙酸(CA-12)萃取钪的性能及其机理。通过研究平衡水相酸度、萃取剂浓度和温度对萃取平衡的影响,用斜率法和等摩尔系列法确定了CA-12萃取钪的机理,并求得了CA-12萃取钪的热力学函数，计算了平衡反应的浓度平衡常数及钪同其它稀土离子的分离系数，指出CA-12是一种从稀土（Ⅲ）中分离钪的优良萃取剂。
수차연구료일충신형췌취제중신기분양기을산(CA-12)췌취항적성능급기궤리。통과연구평형수상산도、췌취제농도화온도대췌취평형적영향,용사솔법화등마이계렬법학정료CA-12췌취항적궤리,병구득료CA-12췌취항적열역학함수，계산료평형반응적농도평형상수급항동기타희토리자적분리계수，지출CA-12시일충종희토（Ⅲ）중분리항적우량췌취제。
The extraction behavior of Sc using se c-octylphenoxyl aceticacid (HA) as extractant from 0.2 mol/L ammonium chloride media has been investigated systematically. The extraction stoichiometry and the extraction constants was found by slope and constant molarity methods. It was demonstrated Sc? was extracted by CA-12 as a complex ScA3.HA. The results also showed that the temperature affected the extraction and the equilibrium constant, the Gibbs energy change and the entropy change of the extraction reaction were calculated. The extraction phenomena and the separation factor between Sc（Ⅲ） a nd other trivalent rare earths with sec-octylphenoxyl acetic acid were better than those with naphthenic acid which is widely used in Sc（Ⅲ） separation. It sh owed sec-octylphenoxyl acetic acid was a valuable extractant which could be employed to replace naphthenic acid.