naa a22 4500 510820417 CHVBK 20180411083528.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11814-013-0135-3 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0135-3 Modeling and simulation of solvent extraction processes for purifying rare earth metals with PC88A [Elektronische Daten] [Kyung Ryu, Changkyu Lee, Go-Gi Lee, Sungkoo Jo, Su Sung] A new simulation logic and thermodynamic equilibrium analysis algorithm combined with a new model simplification technique was developed to simulate the solvent extraction process for purifying rare earth metals from chloride solution with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC88A) as a solvent. The proposed model simplification method significantly reduces the number of the nonlinear equilibrium equations to be simultaneously solved to overcome the initial guess problem and obtain numerically stable convergence pattern in solving the equilibrium analysis problem and performing the rigorous simulation of the extraction process. A new equilibrium analysis algorithm on the basis of the simplified nonlinear equilibrium equations is also proposed to estimate the equilibrium concentrations by solving the rigorous first principle extraction model. Finally, a solvent extraction simulator is developed to estimate all the concentrations of all the stages of the solvent extraction process by solving the equilibrium analysis problem at each stage in a sequential way. The proposed simulator doe not suffer from the initial guess problem and shows very robust convergence pattern without any numerical problems. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Solvent Extraction nationallicence PC88A nationallicence Rare Earth nationallicence Distribution Coefficient nationallicence Simulation nationallicence Equilibrium Analysis nationallicence Model Simplification nationallicence Ryu Kyung Department of Chemical Engineering, Kyungpook National University, 1370, Sankyeok-dong, Buk-gu, 702-701, Daegu, Korea aut Lee Changkyu Research Institute of Industrial & Science Technology, San 32, Hyoja-dong, Nam-gu, 790-784, Pohang, Korea aut Lee Go-Gi Research Institute of Industrial & Science Technology, San 32, Hyoja-dong, Nam-gu, 790-784, Pohang, Korea aut Jo Sungkoo Research Institute of Industrial & Science Technology, San 32, Hyoja-dong, Nam-gu, 790-784, Pohang, Korea aut Sung Su Department of Chemical Engineering, Kyungpook National University, 1370, Sankyeok-dong, Buk-gu, 702-701, Daegu, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1946-1953 0256-1115 30:10<1946 2013 30 11814 https://doi.org/10.1007/s11814-013-0135-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0135-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ryu Kyung Department of Chemical Engineering, Kyungpook National University, 1370, Sankyeok-dong, Buk-gu, 702-701, Daegu, Korea aut NATIONALLICENCE 700 1- Lee Changkyu Research Institute of Industrial & Science Technology, San 32, Hyoja-dong, Nam-gu, 790-784, Pohang, Korea aut NATIONALLICENCE 700 1- Lee Go-Gi Research Institute of Industrial & Science Technology, San 32, Hyoja-dong, Nam-gu, 790-784, Pohang, Korea aut NATIONALLICENCE 700 1- Jo Sungkoo Research Institute of Industrial & Science Technology, San 32, Hyoja-dong, Nam-gu, 790-784, Pohang, Korea aut NATIONALLICENCE 700 1- Sung Su Department of Chemical Engineering, Kyungpook National University, 1370, Sankyeok-dong, Buk-gu, 702-701, Daegu, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1946-1953 0256-1115 30:10<1946 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer