• Media type: E-Article
  • Title: Model‐based analysis of data from countercurrent liquid‐liquid extraction processes
  • Contributor: Spencer, J. L.; Steiner, Ladislav; Hartland, Stanley
  • Published: Wiley, 1981
  • Published in: AIChE Journal
  • Extent: 1008-1016
  • Language: English
  • DOI: 10.1002/aic.690270618
  • ISSN: 0001-1541; 1547-5905
  • Keywords: General Chemical Engineering ; Environmental Engineering ; Biotechnology
  • Abstract: <jats:title>Abstract</jats:title><jats:p>An efficient iterative method for solving the equations which describe the steady state of a staged countercurrent extraction process is described. The equations include the effects of backmixing, and apply to an arbitrary number of solutes, to nonlinear equilibrium relations, and to variable net phase flow rates (and thus to partially miscible solvents). The solution procedure, based on partial linearization of the equations, is related to and extends the method of Ricker et al. (1980).</jats:p><jats:p>This solution procedure has been used, in conjunction with nonlinear regression methods, to investigate problems related to the determination of parameters by analyzing steady state data. The simultaneous determination of several parameters, including mass transfer coefficients, backmixing coefficients, and equilibrium constants, is shown to be possible. The accuracy with which the parameters can be estimated depends, however, on many factors, including the number and location of the sampling points, the intensity of the backmixing, and the extent to which equilibrium is approached in the column.</jats:p>
  • Description: <jats:title>Abstract</jats:title><jats:p>An efficient iterative method for solving the equations which describe the steady state of a staged countercurrent extraction process is described. The equations include the effects of backmixing, and apply to an arbitrary number of solutes, to nonlinear equilibrium relations, and to variable net phase flow rates (and thus to partially miscible solvents). The solution procedure, based on partial linearization of the equations, is related to and extends the method of Ricker et al. (1980).</jats:p><jats:p>This solution procedure has been used, in conjunction with nonlinear regression methods, to investigate problems related to the determination of parameters by analyzing steady state data. The simultaneous determination of several parameters, including mass transfer coefficients, backmixing coefficients, and equilibrium constants, is shown to be possible. The accuracy with which the parameters can be estimated depends, however, on many factors, including the number and location of the sampling points, the intensity of the backmixing, and the extent to which equilibrium is approached in the column.</jats:p>
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