Liquid–liquid extraction of phosphorus from sulfuric acid solution using benzyl dimethyl amine
来源期刊：International Journal of Minerals Metallurgy and Materials2021年第3期
论文作者：Sadia Ilyas Rajiv Ranjan Srivastava Hyunjung Kim
摘 要：This study addresses the liquid–liquid extraction behavior of phosphorus from a sulfuric acid solution using benzyl dimethyl amine（BDMA） in kerosene. The extraction equilibria investigated with varied BDMA concentrations could reveal the formation of■ complex in the organic phase. The thermodynamic properties determined at various temperatures indicated that the process was exothermic with a calculated enthalpy（■） of-24.0 k J·mol-1. The organic-to-aqueous phase（O/A） volume ratio was varied to elucidate the quantitative extraction of phosphorus. The Mc Cabe–Thiele diagram plotted for the extraction isotherm was validated for the requirement of three counter-current stages in the extraction at an O/A volume ratio of 2.0/3.5. The back-extraction of phosphorus from the loaded organic phase was quantitatively achieved by contacting 4.0 mol·L-1 H2SO4 solution in three stages of counter-current contact at an O/A volume ratio of 3/2. This study can be applied to remove phosphorus from the sulfuric acid leach solutions of monazite processing, and many other solutions.
Sadia Ilyas1，Rajiv Ranjan Srivastava2,3，Hyunjung Kim1
1. Department of Mineral Resources and Energy Engineering, Jeonbuk National University2. Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University3. Faculty of Natural Sciences, Duy Tan University
摘 要：This study addresses the liquid–liquid extraction behavior of phosphorus from a sulfuric acid solution using benzyl dimethyl amine（BDMA） in kerosene. The extraction equilibria investigated with varied BDMA concentrations could reveal the formation of■ complex in the organic phase. The thermodynamic properties determined at various temperatures indicated that the process was exothermic with a calculated enthalpy（■） of-24.0 k J·mol-1. The organic-to-aqueous phase（O/A） volume ratio was varied to elucidate the quantitative extraction of phosphorus. The Mc Cabe–Thiele diagram plotted for the extraction isotherm was validated for the requirement of three counter-current stages in the extraction at an O/A volume ratio of 2.0/3.5. The back-extraction of phosphorus from the loaded organic phase was quantitatively achieved by contacting 4.0 mol·L-1 H2SO4 solution in three stages of counter-current contact at an O/A volume ratio of 3/2. This study can be applied to remove phosphorus from the sulfuric acid leach solutions of monazite processing, and many other solutions.
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