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 is 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), mixture of HSOPAA and ”P6,6,6,14”Cl for rare earth elements (REEs).The ion association extraction mechanism contributes to avoid the numerous saponification procedures using alkali and resulting 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 contributes to decrease the consumption of acid to a considerable extent.
Heavy rare earth Ionic liquid Saponification Fractional extraction
董亚敏 郭向广 王艳良 赵泽原 黄超 孙晓琦
国内会议
南宁
英文
1-12
2016-09-06（万方平台首次上网日期，不代表论文的发表时间）