Liquid–liquid extraction of phosphorus from sulfuric acid solution using benzyl dimethyl amine
- Authors
- Ilyas, Sadia; Srivastava, Rajiv Ranjan; Kim, Hyunjung
- Issue Date
- Mar-2021
- Publisher
- SPRINGER
- Keywords
- solvent extraction; phosphorus; benzyl dimethyl amine (BDMA); sulfuric acid solution; McCabe-Thiele diagram
- Citation
- INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, v.28, no.3, pp.367 - 372
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
- Volume
- 28
- Number
- 3
- Start Page
- 367
- End Page
- 372
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189686
- DOI
- 10.1007/s12613-020-2151-8
- ISSN
- 1674-4799
- Abstract
- 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 3[BDMA].[H3PO4] over bar complex in the organic phase. The thermodynamic properties determined at various temperatures indicated that the process was exothermic with a calculated enthalpy (Delta H-circle minus) of -24.0 kJ.mol(-1). The organic-to-aqueous phase (O/A) volume ratio was varied to elucidate the quantitative extraction of phosphorus. The McCabe-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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