Correlation of flooding in pulsed, perforated-plate extraction columns

McAllister, R. A.; Groenier, W.S.; Ryon, A.D.

doi:10.1016/0009-2509(67)80158-1

Cited by 20 publications

(7 citation statements)

References 4 publications

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“…It was concluded that the throughput increases with an increase in the plate spacing. This was also consistent with the result observed by McAllister et al [25], Smoot and Babb [26], Kagan et al [2]. Tribess and Brunello [20] reported that with increase in plate spacing, the number of plates reduces and the shear force on the drops also reduces, which results in an increase in the mean drop diameter with greater throughput.…”

Section: Effect Of Pulse Velocity On Flooding Curvesupporting

confidence: 93%

“…This was the flooding due to excessive pulsing in the emulsion regime of operation. Thornton [18], McAllister et al [25], Smoot and Babb, [26], Kagan et al [2], Berger and Walter [19], Lorenz et al [4] and Tribess and Brunello [20] have also observed the same results. Kagan et al [2] have also used the kerosene-water system and found that, in mixer-settler regime as the pulse velocity increases, the capacity of the column increases.…”

Section: Effect Of Pulse Velocity On Flooding Curvesupporting

confidence: 74%

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Hydrodynamics of a Pulsed Sieve Plate Extraction Column

Somkuwar

Kolhe

Rathod

2014

Indian Chemical Engineer

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Hydrodynamic characteristics, such as drop size, dispersed phase hold-up and flooding have been studied experimentally in a pulsed sieve plate extraction column of 0.076 m diameter. Geometrical parameters like perforation diameter, plate spacing and fractional free area (FFA) of sieve plate and operating parameters, such as pulse velocity and superficial velocities of dispersed and continuous phase, were studied using kerosenewater system. The drop size was reduced with decrease in perforation diameter, plate spacing, FFA and pulse velocity. Dispersed phase hold-up was found to be a function of drop size and superficial velocity of dispersed phase. At pulse velocity of 0.025m/s the parabolic behaviour with maxima at the transition from mixer-settler to dispersion regime of flooding curve has been noticed for all the different geometrical conditions. The maximum mass transfer interface together with utmost throughput was obtained at perforation diameter of 0.003 m, plate spacing of 0.05m and FFA of 0.2. The optimal operating parameters were pulse velocity of 0.025 m/s and superficial velocity of 0.006 m/s using organic to aqueous ratio (O/A) of 1:1. The drop size attained at these conditions was 0.0015 m with dispersed phase hold-up of 18%. The correlations developed can be used for the prediction of hold-up and drop size.

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Section: Effect Of Pulse Velocity On Flooding Curvesupporting

confidence: 93%

Section: Effect Of Pulse Velocity On Flooding Curvesupporting

confidence: 74%

Hydrodynamics of a Pulsed Sieve Plate Extraction Column

Somkuwar

Kolhe

Rathod

2014

Indian Chemical Engineer

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“…During typical operation, the level of this interface is managed to avoid carry-over during unstable operation. With severe flooding it is reported that hold-up tends to continuously deviate from equilibrium and the disengagement interface rises until carry-over eventually occurs (Mcallister et al, 1967).…”

Section: Representation Of the Multiphase Systemmentioning

confidence: 99%

Implications of hydrodynamics on the design of pulsed sieve-plate extraction columns: A one-fluid multiphase CFD model using the volume of fluid method

Theobald

Hanson

Fairweather

et al. 2020

Chemical Engineering Science

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“…An empirical correlation proposed by McAllister et al . is recommended for pulsed perforated-plate columns.…”

Section: Design Proceduresmentioning

confidence: 99%

Computational Strategies for Sizing Liquid−Liquid Extractors

Kumar

Hartland

1999

Ind. Eng. Chem. Res.

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A stagewise model is presented for the design of countercurrent liquid−liquid extraction columns allowing for breakage and coalescence. Backflow in the continuous phase is considered, and the nonideal behavior of the dispersed phase is described in terms of the drop-size distribution and individual drop velocities. The drop-size distribution, and dispersed-phase holdup are determined along the column. The model is applicable for any equilibrium relationship and allows for the variation in the physical properties of the phases along the column. Examples are given for different types of columns.

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Correlation of flooding in pulsed, perforated-plate extraction columns

Cited by 20 publications

References 4 publications

Hydrodynamics of a Pulsed Sieve Plate Extraction Column

Hydrodynamics of a Pulsed Sieve Plate Extraction Column

Implications of hydrodynamics on the design of pulsed sieve-plate extraction columns: A one-fluid multiphase CFD model using the volume of fluid method

Computational Strategies for Sizing Liquid−Liquid Extractors

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