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

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 pronounce...

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Published inJournal of rare earths Vol. 35; no. 3; pp. 290 - 299
Main Author 董亚敏 郭向广 王艳良 赵泽原 黄超 孙晓琦
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2017
Subjects
fractional extraction
heavy rare earth
ionic liquid
saponification
ionic liquid
fractional extraction
heavy rare earth
saponification
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Summary: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.
Bibliography:heavy rare earth; ionic liquid; saponification; fractional extraction
11-2788/TF
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.
DONG Yamin;GUO Xiangguang;WANG Yanliang;ZHAO Zeyuan;HUANG Chao;SUN Xiaoqi;Xiamen （1. Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy ofSciences, Xiamen 361021, China; 2. Fujian Institute of Research on the Struc- ture of Matter, Chinese Academy of Sciences, Fuzhou 350002, China; 3. School qf Metallurgy and Chemical Engineering, Jiangxi University of Science ＆ Teeh- nology, Ganzhou 341000, China）
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(17)60912-8