Measurement of Continuous-Phase Mass Transfer Coefficient at Droplet Surface in Liquid-Liquid Mixing Vessel by Chemical Reaction Method

Hiraoka, Setsuro; Yamada, Ikuho; Tada, Yutaka; Mori, Hideki; Narita, Naoki; Suzuki, Hiyori; Aragaki, Tsutomu; Park, Young Tae

doi:10.1252/jcej.23.166

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Values seem to be of the same order of magnitude. The kinetic constant of the reaction estimated in this work is slightly greater than the value estimated by Alwan et al (1983) and Hiraoka et al (1990), which is probably explained by the fact that these authors did not take into account the diffusion of synthesized pentanol toward the organic phase. In the same way, a mass‐transfer resistance of pentanol in the organic film may explain that the mass‐transfer coefficient of pentanol is smaller than the correlated value.…”

Section: Resultscontrasting

confidence: 87%

Sequential experimental design strategy for rapid kinetic modeling of chemical synthesis

2005

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Section: Resultscontrasting

confidence: 87%

Sequential experimental design strategy for rapid kinetic modeling of chemical synthesis

2005

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“…This reaction has been studied previously (Alwan et al, 1983;Hiraoka et al, 1990;Issanchou et al, 2003;…”

Section: System Of Phasesmentioning

confidence: 94%

“…For runs in the cuphorn, all quantities have been multiplied by 3. During reaction, the sodium hydroxide concentration C B is followed by measurement of the solution conductivity γ (t) as suggested by Hiraoka et al (1990), andIssanchou et al (2003). From the conductivities at time t, γ, at time zero, γ °, and at the end of reaction, γ ∞ , (when all the sodium hydroxide has reacted), C B can be calculated:…”

Section: Experimental Conditionsmentioning

confidence: 99%

Ultrasound to Enhance a Liquid-Liquid Reaction

Wilhelm

Laugier

Kıdak

et al. 2010

J. Chem. Eng. Japan

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Liquid-liquid mass transfer with ultrasound was investigated experimentally during the hydrolysis of n-amyl acetate. Power ultrasound is supposed to improve the yield and kinetics of such multiphase chemical reactions thanks to the mechanical effects of cavitation. Indeed, implosion of micro-bubbles at the vicinity of the liquidliquid interface generates disruption of this surface, and enhances mixing in the liquid around the inclusion, thus improving mass transfer between the two phases. This effect has been demonstrated here on the hydrolysis of namyl acetate by sodium hydroxide, a rather slow reaction but influenced by mass transfer; the reaction is carried out in a glass jacketed reactor, 500 mL of volume, equipped with a Rushton turbine and a 20 kHz sonotrode dipping in the solution. The ester is initially pure in the organic dispersed phase, and sodium hydroxide has an initial concentration of 300 mol/m 3 ; one of the products, pentanol partitions between the two phases and the sodium salt stays in the aqueous phase. The initial apparent reaction rate is measured from the record of the conductivity giving the concentration of alkali versus time. The reaction rate was always found to increase when ultrasound is superimposed to mechanical stirring (at 600 rpm), with a positive influence of input power (20 and 50 W). When varying initial concentration (300 and 600 mol/m 3 ), temperature (36 and 45°C) and ultrasound emitter (sonotrode or cuphorn), the benefit of ultrasound over mechanical agitation was systematic. The only case of a weak influence of ultrasound was the sonication of a dense medium, containing 23% of organic phase and impeding the propagation of ultrasound.

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Chemical probe systems for assessing liquid-liquid mixing efficiencies of reactors

Zhang

et al. 2023

Front. Chem. Sci. Eng.

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Measurement of Continuous-Phase Mass Transfer Coefficient at Droplet Surface in Liquid-Liquid Mixing Vessel by Chemical Reaction Method

Cited by 6 publications

References 11 publications

Sequential experimental design strategy for rapid kinetic modeling of chemical synthesis

Sequential experimental design strategy for rapid kinetic modeling of chemical synthesis

Ultrasound to Enhance a Liquid-Liquid Reaction

Chemical probe systems for assessing liquid-liquid mixing efficiencies of reactors

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