Extraction　Separation　of　Scandium，Iron　and　Lutetium　with　Isopropyl　Phosphonic　Acid　Mono（1－hexyl－4－ethyl）OctylEster  

作　　者：孙静 李德谦 叶伟贞 

出　　处：《Journal of Rare Earths》1995年第1期5-9,共5页稀土学报（英文版）

摘　　要：The extraction and stripping of scandium from its sulfate solutions by isopropyl phosphonic acid mono (1-hexyl-4-ethyl) octyl ester (PT-2, HL) diluted with n-hexane are reported. A high efficiency of separation between scandium, iron and lutetium can be achieved by controlling aqueous acidity. Different mechanisms of Sc3+ with PT-2 in various acid range have been proposed.At lower aqueous acidity, it is a cation exchange reaction, while at higher acidity. a solvation reaction was ascertained. Its IR and NMR spectra have been discussed. The effect of temperature on extraction of Sc3+ was observed and thermodynamic functions were calculated.The extraction and stripping of scandium from its sulfate solutions by isopropyl phosphonic acid mono (1-hexyl-4-ethyl) octyl ester (PT-2, HL) diluted with n-hexane are reported. A high efficiency of separation between scandium, iron and lutetium can be achieved by controlling aqueous acidity. Different mechanisms of Sc3+ with PT-2 in various acid range have been proposed.At lower aqueous acidity, it is a cation exchange reaction, while at higher acidity. a solvation reaction was ascertained. Its IR and NMR spectra have been discussed. The effect of temperature on extraction of Sc3+ was observed and thermodynamic functions were calculated.

关 键 词：Isopropyl phosphonic acid mono (1-hexyl-4-ethyl) octyl ester. Extraction separation Scandium Iron LUTETIUM 

分 类 号：O652.62[理学—分析化学]