A separation processing for industrial rare earth feed solution by phosphonium ionic liquid type saponification strategy
来源期刊：JOURNAL OF RARE EARTHS2017年第3期
论文作者：董亚敏 郭向广 王艳良 赵泽原 黄超 孙晓琦
文章页码：290 - 299
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]([P6,6,6,14][SOPAA]) were pronouncedly higher than those of sec-octylphenoxy acetic acid（HSOPAA）,a mixture of HSOPAA and[P6,6,6,14]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.
董亚敏1,2，郭向广1,2，王艳良1,2，赵泽原1,2，黄超1,3，孙晓琦1,2
1. Xiamen Institute of Rare Earth Materials,Haixi Institute,Chinese Academy of Sciences2. Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences3. School of Metallurgy and Chemical Engineering,Jiangxi University of Science & Technology
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]([P6,6,6,14][SOPAA]) were pronouncedly higher than those of sec-octylphenoxy acetic acid（HSOPAA）,a mixture of HSOPAA and[P6,6,6,14]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.
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