Mass and heat transfer to drops in a mixer-settler

Coughlin, Robert W.; Berg, R.L. Von

doi:10.1016/0009-2509(66)80002-7

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Higher dispersed-phase holdup and smaller drop size probably account for the effects under recycle conditions. The rates for the kerosene-water-2-ethylbutyric acid system compare well with the work of Coughlin and Von Berg (1966). For a pump-mix type of mixer, they obtained rates (at 27 °C) of 0.0084 (water) and 0.0094 (kerosene) g mol/min at 420 rpm and 0.0035 and 0.0037 g mol/min, respectively, at 275 rpm.…”

Section: Interpretation Of Resultssupporting

confidence: 69%

“…The distribution ratio will be 1/D if extraction is from water into kerosene. The distribution varies with solute concentration due to the dependence of the chemical potential on the concentration of the solute in the two phases, which is apparent since 2EBA is freely soluble in kerosene while its solubility in water is only 1.6 wt % (Coughlin and Von Berg, 1966). It can also be seen from Figure 5 that the equilibrium distribution is not very sensitive to small changes in temperature.…”

Section: Resultsmentioning

confidence: 86%

“…The phases are mixed at a speed of 250 rpm for 3 h. Runs are duplicated by doubling the time to 6 h. The effects of small deviations from 20 °C (±2 °C) and time effects of 1-60 min are studied. Solute concentrations of both the organic (kerosene) and aqueous (water) phases are determined by titration with sodium hydroxide (Coughlin and Von Berg, 1966) while using potassium hydrogen phthalate as the primary standard.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

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Effects of internal stage recycle on efficiency and performance of a mixer-settler

Kaul¹,

Wormer²

1985

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

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= average deactivation function for 11 the reactions, of strength q, defined by eq 2 strengths, min-' strengths and reactants, min-' Registry No. Carbon, 7440-44-0. Literature Cited Absil. R. P. L.; Butt, J. B.; Dranoff, J. S. J. Catal. 1984. 8 5 , 415. Best, D. A.; Pachovsky, R. A.; Wojciechowski, B. W. Can. J. Chem. Eng. Best, D. A.; Wojciechowski, B. W. J. Catal. 1977, 47, 343. Blanding, F. H.; Ind. Eng. Chem. 1953, 45, 1186. Butt, J. 6.; Watcher, C. K.; Billimoria, R. M. Chem. Eng. Scl. 1978, 338 Beranek, L. Catal. Rev. Sci. Eng. 1977, 16(1), 25. Corella, J.; Asua, J. M. Can. J . Chem. Eng. 1981a, 59, 506. Coreila, J.; Asua, J. M. "Proceedlngs, 2nd Work( Congress 0' Chemical Engineering, Montreal, Canada, 198lb; Voi. 111, pp 225-22b. Corella, J.; Asua, J. M. Ind. Eng. Chem. frocessDes. Dev. 1982a, 21, 55. Coreiia, J.; Asua, J. M. Ind. Eng. Chem Process Des. Dev. 1982b, 27, 551. Corella, J.; Asua, J. M. An. Quim. 1984, 80, 715. Corella, J.; Bilbao, J.; Asua, J. M. Can. J. Chem. Eng. 198la, 5 9 , 647. Coreila, J.; Biibao. J ; Aznar, M. P. Int Chem. Eng. 1985a. 2 5 , 2. 1971, 49, 809. 1321. Coreila, J.; Bilbao. J.; Bllbao, R. An. Oulm 1984, 8 0 , 244. Corella, J.; Bilbao, R.: Artlgas, A.; Ing. 0, .m. 198lb. 152, 87. Corella, J.; Blibao, R.; Moilna, J. A. An. Qulm., 1985b. in press. Corella, J.: Iranzo, C.: Fernandez, A.; Labordeta, L. Ing. Ouim. 1983, 170, Coreiia, J.; Menendez, M. Chem. Eng. Sci., 1985~. submitted. Corelia, J.; Mollna, J. A. Ind. Eng. Chem. Process Des. Dev., submitted. Corella, J.; Monzbn, A.; Butt, J. B.; Absil, R. P. L. J. Catal., submitted. Del Angel, G. A.; Coq, 8.: Figueras, F. Nouv. J. Chim. 1983, 7 , 173. Forzatti. P.; Buzzi-Ferraris, G.; Morbidelil, M.; Carra, S. Int. Chem. Eng. 1984, 2 4 , 85.The effects of internal stage recycle on the performance of a mixer-settler is studied with an unfavorable system where 2-ethylbutyric acld Is extracted from kerosene into water. The mixer is designed as a closed, unbaffled, cylindrical vessel operated with continuous-flow, no air-liquid interface, and no air-volute. The contractor is a single stage operated at a constant revolution per minute (rpm) with water as the dispersed phase. Solute concentrations in the feed range are in parts per million (ppm). Effects of efficiency, recovery, mass-transfer rate and coefficient of varying feed flow rate, solvent-to-feed ratio, and recycle ratio are investigated. Extract recycle improves performance even though the distribution ratio is low and varies around 1. Optimal efficiencies are obtained at a flow ratio equal to 1 which significantly improve with recycle and recycle ratios in the region of 0.5 are found to be independent of pure solvent flows.The inffuence of molstue on the thermal degradation of wood waste was investigated by pyrolyzing ground samples in a batch fkr#bed reactor at between 320 and 470 O C in hellurn at 101-104 kPa. The wood samples were heated at about 300 O C / min, so that drying and pyrolysls were simultaneous. The presence of moisture increased the yield of char by as much as ...

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Section: Interpretation Of Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 86%

Section: Theoretical Backgroundmentioning

confidence: 99%

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Effects of internal stage recycle on efficiency and performance of a mixer-settler

Kaul¹,

Wormer²

1985

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

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Effect of Physical Parameters on the Stirred Separation Process in Rare Earth Extraction System

Wang¹,

Zhang²,

Zhang³

et al. 2014

Rare Metal Technology 2014

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Transfert de chaleur par contact direct entre deux liquides immiscibles dans un mélangeur‐décanteur

Pâquet

Grenier

1973

Can J Chem Eng

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It is shown by means of two performance criteria that a mixer‐settler combination can successfully be used as a direct contact heat transfer device between two immiscible liquids. This combination was operated under steady‐state conditions. The two criteria were a heat transfer efficiency and an overall volumetric heat transfer coefficient. The experimental results show a considerable increase in efficiency and in the overall coefficient with increasing rotational speed of the agitator. These two criteria are also influenced by the ratio of heat flow rates of the two liquids; one particular value of this ratio results in a minimum heat transfer efficiency; at another value the volumetric coefficient passes through a maximum.

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Mass and heat transfer to drops in a mixer-settler

Cited by 8 publications

References 13 publications

Effects of internal stage recycle on efficiency and performance of a mixer-settler

Effects of internal stage recycle on efficiency and performance of a mixer-settler

Effect of Physical Parameters on the Stirred Separation Process in Rare Earth Extraction System

Transfert de chaleur par contact direct entre deux liquides immiscibles dans un mélangeur‐décanteur

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