Calculation of Transient Behavior of Solvent Extraction Processes

Lowe, J. T.

doi:10.1021/i260027a008

Cited by 19 publications

(2 citation statements)

References 6 publications

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“…Thus, stage j is recalculated, and stages j -1 and j + 1 are calculated using the results from stage j in the previous time interval ( -). This procedure continues for as many time This computational method was adapted from that used by Lowe (1968) and produces concentrations throughout the contactor as a function of time. It allows the study of the transient behavior of the system resulting from a startup, shutdown, process variable perturbation, or other nonsteady-state situation.…”

Section: Calculational Proceduresmentioning

confidence: 99%

An Analysis of the Transient and Steady-State Operation of a Countercurrent Liquid-Liquid Solvent Extraction Process

Groenier¹,

Rainey²,

Watson³

1979

Ind. Eng. Chem. Proc. Des. Dev.

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Section: Calculational Proceduresmentioning

confidence: 99%

An Analysis of the Transient and Steady-State Operation of a Countercurrent Liquid-Liquid Solvent Extraction Process

Groenier¹,

Rainey²,

Watson³

1979

Ind. Eng. Chem. Proc. Des. Dev.

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“…There are only nine important reported studies on the computer simulation of the extraction calculations. These are either devoted to the design of various types of extraction columns (SI, 41,51,71,91) or to the general evaluation of the extraction process (II,21,61,81). All these studies have used a digital computer as a simulator.…”

Section: Extractionmentioning

confidence: 99%

Computer Simulations of Transport Processes

Shah¹

1972

Product R&D

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He received the BS degree from the University of Michigan and the MS and PhD degrees from Massachusetts Institute of Technology. Before joining the University of Pittsburgh, he was associated vrith A bear Inc., Cambridge, MA. During the year 1970-71, he was a visiting scholar at the University of Cambridge, Cambridge, U.K, He presently teaches courses in reaction engineering and has research interests in reaction engineering and special types of transport phenomena.Recent developments in computer technology have created a significant impact on our theoretical as well as practical understandings of the transport processes. The problems, which appeared rather impossible to comprehend previously, are now evaluated easily with the help of a computer. Thus, a computer simulation has become an intimate and important part of the study of transport phenomena.The advantages of a computer simulation are manyfold. It allows a rapid and relatively inexpensive evaluation of a complex process. It is almost essential for the identification, optimization, and control studies of a complex process. It can

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Dynamic simulation of a stagewise mass transfer process with back‐mixing

1970

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A model is presented for studying the dynamic behavior of stagewise processes with non-ideal stages and back-mixing between them. By numerical integration on a computer, solutions have been obtained for two variants of the model: with a linear and non-linear equilibrium relationship respectively. For the first variant an approximate relation was obtained for calculating the start-up time. The analysis presented has been experimentally verified for a reciprocating-plate extractor.c dynamic behavior of mass transfer processes is attracting Th increasing interest. Papers published on this topic deal cither with problems associated with control of such processes or with the start-up time. The essential requirements on models for the first of thc two purposes named are that they yield a solution rapidly, and that they be sufficiently accurate especially for the initial period of the responsc. With models for the latter purpose, howcvcr, the time required for obtaining a solution is not a critical factor, but a sufficiently high degree of accuracy is required ovcr the entire start-up period. The second type of model can hc utilized also for studying the optimal start-up regime: either to attain steady state in the shortest time, or to minimize loss of product. These aspects arc of special significance in semi-continuous production lincs.Models developed for studying the dynamic behavior of extraction and absorption plant can be classified into the following groups: I . Distributed-parameter models (a) for differential contact of phases (I-@, (b) for differential contact of phases, but including the effect of axial dispersion @-Io). 2. 1,umped-parameter models (a) for stagewise contact (l*6-10*11), (h) for stagewise contact with non-ideal stages ( l 2 -I b ) , (c) for stagewise contact with non-ideal stages and back-

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Calculation of Transient Behavior of Solvent Extraction Processes

Cited by 19 publications

References 6 publications

An Analysis of the Transient and Steady-State Operation of a Countercurrent Liquid-Liquid Solvent Extraction Process

An Analysis of the Transient and Steady-State Operation of a Countercurrent Liquid-Liquid Solvent Extraction Process

Computer Simulations of Transport Processes

Dynamic simulation of a stagewise mass transfer process with back‐mixing

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