摘要
本文研究用２—氨基苯并噻唑（简写ＡＢＴ）溶剂萃取铑的最佳条件。在ＫＩ存在下于ｐＨ１～３，加热６０ｍｉｎ，所形成的络合物能定量地被已烷萃取。贱金属离子如Ｆｅ￣（３＋）、Ａｌ￣（３＋）、Ｃｕ￣（２＋）、Ｃｄ￣（２＋）、Ｃｏ￣（２＋）、Ｎｉ￣（２＋）、Ｚｎ￣（２＋）、Ｍｎ￣（２＋）、Ｃａ￣（２＋）、Ｍｇ￣（２＋）及铂族离子Ｐｔ（Ⅳ）、Ｉｒ（Ⅳ）不被萃取，Ｐｄ￣（２＋）可在未加入ＫＩ之前预先萃取分离。斜率法测得萃合物组成为ＲｈＩ＿３（ＡＢＴ），红外光谱表明萃取剂的氨基氮和噻唑氮直接与Ｒｈ（Ⅲ）配位，形成三元异配位体络合物。铱（Ⅳ）不被萃取，可使铑与铱分离。
In this paper theoptimum conditions ofthe extraction of Rh(Ⅲ)with 2-aminoben-zothiazole(ABT)were established.Experi-mental results showedthat rhodium(Ⅲ)could be extracted from iodide solution with ABT into hexane at the range of pH 1.0 to3.0.The formation of the extracted complex required heating the solution in boiling waterbath for 60 minutes.Common metal ions such as Fe￣(3+),Al￣(3+),Cu￣(2+),Cd￣(2+),Co￣(2+),Ni￣(2+),Zn￣(2+),Ca￣(2+),Mg￣(2+)and Pt(Ⅳ),Ir( Ⅳ)are not extracted.Palladi-um could be first extracted with butyl acetateat pH2.0 before KI was added.The composi-tion of extracted complex has been determinedas RhI_3(ABT)by means of the slope method.From infrared spectra of ABT itself and rhodi-um complex,it was confirrned that ABT wascoordinated to rhodium through the exocyclicamino-nitrogen and ring-nitrogen. The ex-tractable species of rhodium was a mixed coor-dination complex. The separation of rhodiumand iridium was possible,since iridium(Ⅳ)was much less extractable.
出处
《分析试验室》
CAS
CSCD
北大核心
1996年第3期1-5,共5页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金
关键词
2-氨基苯并噻唑
铑和铱分离
溶剂萃取
aminobenzothiazole
rhodiumand iridium separation
solvent exraction
