Application of Pulsation to Liquid-Liquid Extraction

Chantry, W. A.; Berg, R.L. Von; Wiegandt, Herbert

doi:10.1021/ie50546a020

Cited by 53 publications

(26 citation statements)

References 5 publications

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“…Liquid‐liquid extraction in pulsed columns is a frequently applied technique in chemical engineering, hydrometallurgy, nuclear technology, and other areas due to its high separation efficiency by reducing axial mixing and increasing drop breakup and coalescence rate 1–3, and by controlling the pulse intensity which improves the rate of mass transfer by size reduction of the drops 4. Mass transfer is a function of the interfacial area which can be calculated from drop size and holdup 5, 6.…”

Section: Introductionmentioning

confidence: 99%

Effect of Structural Parameters on Drop Size Distribution in Pulsed Packed Columns

et al. 2014

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The effect of packing type on drop size distribution in pulsed packed columns was investigated by means of different columns and three packing types with three liquid systems including n‐butyl acetate, toluene, and kerosene with water. These liquid systems cover a wide range of interfacial tensions. Also the influence of operating variables in terms of pulse intensity and volumetric flow rates of dispersed and continuous phases was examined. Pulse intensity, interfacial tension, and packing shape were found as the main important factors for drop size distribution while volumetric flow rates had no significant effect. Correlations are presented to predict drop distribution and mean drop size in pulsed packed columns.

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Section: Introductionmentioning

confidence: 99%

Effect of Structural Parameters on Drop Size Distribution in Pulsed Packed Columns

et al. 2014

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“…If both phases are dilute or the concentration change is not large, the operating line will be straight and will intersect the equilibrium curve at a point xy, 2 ' . are very nearly perpendicular to one another.…”

Section: Correlations By Transfer Unitsmentioning

confidence: 99%

Scale-up of a Novel Mixer-Settler Extractor

Long¹,

Fenske²

1961

Ind. Eng. Chem.

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“…With these ideas in mind, Van Dijck (1935) proposed that the volumetric efficiency of a perforated plate could be improved by either pulsing the liquids or reciprocating the plates. Chantry et al (1955) have shown that the height of a packed column required to effect a given degree of extraction is reduced by a factor of three under pulsation. The pulsed columns have a clear advantage over other mechanical contactors when processing corrosive or radioactive solutions since the pulsing unit can be remote from the column.…”

Section: Introductionmentioning

confidence: 99%

Flooding characteristics in pulsed packed extraction columns

Asadollahzadeh

Asl

Safdari

et al. 2011

Braz. J. Chem. Eng.

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-Flooding behavior of a 76.2 mm diameter pulsed packed column has been determined using four different liquid-liquid systems. The effects of pulsation intensity, flow ratio, interfacial tension, and packing geometry on flood point have been investigated. The results showed that the maximum throughput of the column decreases with an increase in pulsation intensity and flow ratio, while it increases with an increase in interfacial tension. The applicability of the characteristic velocity method to this type of column for the analysis of the flood point was examined and a marked deviation was observed between experimental results and values calculated by this method. Two new empirical correlations for flooding velocity and holdup at flooding are derived in terms of operating variables, packing characteristics, and physical properties of the liquid systems. Good agreement between prediction and experiments has been found for all operating conditions that were investigated.

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Application of Pulsation to Liquid-Liquid Extraction

Cited by 53 publications

References 5 publications

Effect of Structural Parameters on Drop Size Distribution in Pulsed Packed Columns

Effect of Structural Parameters on Drop Size Distribution in Pulsed Packed Columns

Scale-up of a Novel Mixer-Settler Extractor

Flooding characteristics in pulsed packed extraction columns

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