A separation processing for industrial rare earth feed solution by phosphonium ionic liquid type saponification strategy  

作　　者：董亚敏 郭向广 王艳良 赵泽原 黄超 孙晓琦 

机构地区：[1]Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China [2]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China [3]School of Metallurgy and Chemical Engineering, Jiangxi University of Science & Technology, Ganzhou 341000, China

出　　处：《Journal of Rare Earths》2017年第3期290-299,共10页稀土学报（英文版）

基　　金：supported by “Hundreds Talents Program” from Chinese Academy of Sciences,National Natural Science Foundation of China(21571179);Science and Technology Major Project of the Fujian Province,China(2015HZ0101);Xiamen Universities Research Institutions Jointing Enterprise Projects(3502Z20152009)

摘　　要：A novel ionic liquid type saponification processing based on quaternary phosphonium type bifunctional IL was developed for yttrium separation from ion-adsorbed rare earth deposit.The extractabilities of（[trihexyl（tetradecyl）phosphonium][sec-octylphenoxy acetate]（[P_（6,6,6,14）][SOPAA]） were pronouncedly higher than those of sec-octylphenoxy acetic acid（HSOPAA）,a mixture of HSOPAA and[P_（6,6,6,14）]Cl for rare earth elements（REEs）.The ion association extraction mechanism contributed to avoiding the numerous saponification procedures using alkali and resulting in saponification wastewater.After 13 stages of extraction and 6 stages of scrubbing sections,the Y（Ⅲ） was successfully separated from industrial heavy RREs feed,the purity of Y（Ⅲ） in raffinate was approximately to be 98.9%.Stripping by distilled water was effectively achieved for REEs,which contributed to the decreased consumption of acid to a considerable extent.A novel ionic liquid type saponification processing based on quaternary phosphonium type bifunctional IL was developed for yttrium separation from ion-adsorbed rare earth deposit.The extractabilities of（[trihexyl（tetradecyl）phosphonium][sec-octylphenoxy acetate]（[P_（6,6,6,14）][SOPAA]） were pronouncedly higher than those of sec-octylphenoxy acetic acid（HSOPAA）,a mixture of HSOPAA and[P_（6,6,6,14）]Cl for rare earth elements（REEs）.The ion association extraction mechanism contributed to avoiding the numerous saponification procedures using alkali and resulting in saponification wastewater.After 13 stages of extraction and 6 stages of scrubbing sections,the Y（Ⅲ） was successfully separated from industrial heavy RREs feed,the purity of Y（Ⅲ） in raffinate was approximately to be 98.9%.Stripping by distilled water was effectively achieved for REEs,which contributed to the decreased consumption of acid to a considerable extent.

关 键 词：heavy rare earth ionic liquid SAPONIFICATION fractional extraction 

分 类 号：O614.322[理学—无机化学]