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in the process of direct solvent extraction of tungsten from alkaline medium. The effects of Na2CO3 concentration in leaching solution, composition and concentration of stripping reagent on the extraction and stripping were investigated. The isotherms of the extraction and stripping were plotted, and the optimum flow ratio and stripping stage were determined through Kremser formula. Based......
, Central South University, Changsha 410083, China) Abstract: Copper was separated from cobalt in ammonia leaching solution by solvent extraction using Lix973 as extractant and sulfuric acid as stripping agent. The effects of extractant volume fraction, volume ratio of organic phase to aqueous phase (V(O)/V(A)), contacting time, mass concentration of stripping agent, V(O)/V(A) of stripping on extractive......
on the electrochemical dissolution of lead and indium were investigated. The effects of extraction phase ratio and mixing time on solvent extraction of indium and striping phase ratio and stripping stage on the loaded organic phase stripping were also investigated. The experimental results indicate that under optimum conditions, the purity of lead deposited on cathode is 98.5% and the deposit......
phase was 80:80,the extraction efficiency was over 95%.The effect of stripping phase acidity on the La(III)recovery was studied.The results showed that when the stripping phase pH was 2.0,organic phase flow rate to stripping phase flow rate was 20:80;the recovery efficiency of La(III)can reach 82%.关键词:......
Cyanex 272 and P507. In this paper, HYY-2 was synthesized in our lab, and the extraction equilibrium, thermodynamics and stripping acidity for La, Gd and Y, which stood for light rare earth elements(REE), middle REE and heavy REE respectively, from nitrate media with this extractant were investigated. Meanwhile, extraction ability, capacity and stripping acidity of HYY-2 were investigated......
and cerium);(2) solvent extraction by applying saponified P507-kerosene system;(3) stripping. Experiments to assure optimal operating conditions were conducted. Results indicated that RE metals could... of 85%. For extraction, initial pH value of 3.17, organic/aqueous ratio(O/A ratio) of 2:1 with an extractants’ saponification rate of 20% could obtain 100% efficiency. In the stripping process, 1 mol......
phase was 80:80,the extraction efficiency was over 95%.The effect of stripping phase acidity on the La(III)recovery was studied.The results showed that when the stripping phase pH was 2.0,organic phase flow rate to stripping phase flow rate was 20:80;the recovery efficiency of La(III)can reach 82%.关键词:......
Cyanex 272 and P507. In this paper, HYY-2 was synthesized in our lab, and the extraction equilibrium, thermodynamics and stripping acidity for La, Gd and Y, which stood for light rare earth elements(REE), middle REE and heavy REE respectively, from nitrate media with this extractant were investigated. Meanwhile, extraction ability, capacity and stripping acidity of HYY-2 were investigated......
and cerium);(2) solvent extraction by applying saponified P507-kerosene system;(3) stripping. Experiments to assure optimal operating conditions were conducted. Results indicated that RE metals could... of 85%. For extraction, initial pH value of 3.17, organic/aqueous ratio(O/A ratio) of 2:1 with an extractants’ saponification rate of 20% could obtain 100% efficiency. In the stripping process, 1 mol......
