Extraction of rare earth ions from phosphate leach solution using emulsion liquid membrane in concentrated nitric acid medium
来源期刊：JOURNAL OF RARE EARTHS2018年第11期
论文作者：Qianlin Chen Xin Ma Xin Zhang Yunqi Liu Ming Yu
文章页码：1190 - 1197
摘 要：It is very significant to recover rare earths（REs） from wet-process phosphoric acid, in terms of extraction rate and selectivity, the current carrier di（2-ethlhexly） phosphate（D2EHPA） out there is still inferior.Based on this question, our team modified D2EHPA to synthesize new extractants. This paper presents a comprehensive study on the extraction of rare earth ions(RE3+) from phosphate leach solution using emulsion liquid membrane（ELM） in concentrated nitric acid medium. The ELM system is made up of（RO）2P（O）OPh-COOH as carrier, polyisocrotyl succinimide（T154） as surfactant, sulfonated kerosene as diluent, phosphoric acid（H3PO4） as stripping solution. Different chemical parameters such as type and concentration of carrier, surfactant, stripping solution, volume ratio of oil phase to internal phase, and volume ratio of emulsion ratio to external phase were analyzed. The extraction of RE3+ was evaluated by the yield of extraction. In addition, the demulsification process was also investigated. The proposed method of ELM using（RO）2P（O）OPh-COOH as carrier can be expected to provide an efficient, simplify operation, and facilitated method for extracting RE3+.
Qianlin Chen1,2，Xin Ma1，Xin Zhang1，Yunqi Liu1，Ming Yu1
1. School of Chemistry and Chemical Engineering,Guizhou University
摘 要：It is very significant to recover rare earths（REs） from wet-process phosphoric acid, in terms of extraction rate and selectivity, the current carrier di（2-ethlhexly） phosphate（D2EHPA） out there is still inferior.Based on this question, our team modified D2EHPA to synthesize new extractants. This paper presents a comprehensive study on the extraction of rare earth ions(RE3+) from phosphate leach solution using emulsion liquid membrane（ELM） in concentrated nitric acid medium. The ELM system is made up of（RO）2P（O）OPh-COOH as carrier, polyisocrotyl succinimide（T154） as surfactant, sulfonated kerosene as diluent, phosphoric acid（H3PO4） as stripping solution. Different chemical parameters such as type and concentration of carrier, surfactant, stripping solution, volume ratio of oil phase to internal phase, and volume ratio of emulsion ratio to external phase were analyzed. The extraction of RE3+ was evaluated by the yield of extraction. In addition, the demulsification process was also investigated. The proposed method of ELM using（RO）2P（O）OPh-COOH as carrier can be expected to provide an efficient, simplify operation, and facilitated method for extracting RE3+.
关键词：
