Liquid-Liquid Extraction with Interphase Chemical Reaction in Agitated Columns. 1. Mathematical Models

Sarkar, Sukhamoy; Mumford, C.J.; Phillips, Colin R.

doi:10.1021/i260076a027

Cited by 15 publications

(8 citation statements)

References 6 publications

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“…Very limited research is available on the extraction kinetics of Eu(III) coupled with ionic liquid. The separations of certain rare earth metals are characterized by fast reaction but slow mass transfer using conventional organic solutions (Sarkar et al, 1980). When ionic liquids are used, however, this may not be the case due to their unique ion exchange mechanisms.…”

Section: Chemical Mechanismsmentioning

confidence: 99%

Intensified Eu(III) extraction using ionic liquids in small channels

Angeli

2016

Chemical Engineering Science

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The extraction of Eu(III) from nitric acid solutions was studied in intensified small scale separation units using an ionic liquid solution (0.2M n-octyl(phenyl)-N,N-diisobutylcarbamoylmethyphosphine oxide (CMPO)-1.2M Tributylphosphate) (TBP)/1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide; ([C4min][NTf2])as the extraction phase. The investigations were carried out in channels with 0.2 mm and 0.5 mm diameter for phase flowrates that result in plug flow with the aqueous solution as the dispersed phase. The interfacial area in plug flow and the velocity profiles within the plugs were studied with high speed imaging and bright field micro Particle Image Velocimetry. Distribution and mass transfer coefficients were found to have maximum values at nitric acid concentration of 1M. Mass transfer coefficients were higher in the small channel, where recirculation within the plugs and interfacial area are large, compared to the large channel for the same mixture velocities and phase flow rates. Within the same channel, mass transfer coefficients decreased with increasing residence time indicating that significant mass transfer takes place at the channel inlet where the two phases come into contact. The experimental results were compared with previous correlations on mass transfer coefficients in plug flows.

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Section: Chemical Mechanismsmentioning

confidence: 99%

Intensified Eu(III) extraction using ionic liquids in small channels

Angeli

2016

Chemical Engineering Science

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“…The "enhancement" of mass transfer by reaction has been studied extensively by chemical engineers (Astarita, 1967;Danckwerts, 1970) in connection with gas absorption. These approaches have been extended from absorption to extraction as reviewed by Sarkar et al (1980) and Sharma (1983).…”

Section: Kinetics Of Reactive Extractionmentioning

confidence: 99%

Solvent extraction — the challenges of a “mature” technology

Baird

1991

Can J Chem Eng

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The solvent extraction area is perceived by some chemical engineers as being mature and fully developed. The present review shows that this is not the case. Many chemical engineering problems must be solved before equipment can be confidently designed from first principles. The review also outlines progress in extraction process chemistry, and in new techniques such as membrane extraction.Le domaine de I'extraction des solvants est perqi par certains ingCnieurs en gtnie chimique comme Ctant bien avancC et pleinement dCveloppC. On montre dans la prCsente ttude que ce n'est pas le cas. De nombreux probkmes de gCnie chimique doivent Ctre r6solus avant que I'on puisse utiliser en toute confiance les principes fondamentaux pour concevoir I'kquipement. On souligne Cgalement les progrks rCalisCs dans la chimie des procCdCs d'extraction ainsi que dans les nouvelles techniques telles que I'extraction par membrane.

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“…(2) Once inversion set in by way of the well packed drops, it was not possible to reverse the process and very large changes in phase ratios were needed to reinvert. Sarkar (1976) and Al- Hemiri (1973) have reported that a 2-3% change in phase flow rate was sufficient to disturb the inversion and revert to the original dispersion.…”

Section: Phase Inversion With N O Mass Tronsfermentioning

confidence: 99%

Part III: Continuous esterification of butanol in a rotating disc extractor

1981

AIChE Journal

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The esterification of n‐butyl alcohol with acetic acid has been carried out continuously in a Rotating Disc Extractor (RDC) in a two phase water‐n‐heptane system. Peculiar phase inversion characteristics have been observed under some experimental conditions during simultaneous transfer of the acid and alcohol, and this has been explained in terms of the changes in the concentration gradients of these two species along the length of the column. A mathematical model has been developed of the continuous process incorporating the equilibria correlations presented in Part I of this study and the kinetic data presnted in Part II to predict the performance of the RDC. The predicted results have been compared with the experimental results and good agreement was obtained.

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Liquid-Liquid Extraction with Interphase Chemical Reaction in Agitated Columns. 1. Mathematical Models

Cited by 15 publications

References 6 publications

Intensified Eu(III) extraction using ionic liquids in small channels

Intensified Eu(III) extraction using ionic liquids in small channels

Solvent extraction — the challenges of a “mature” technology

Part III: Continuous esterification of butanol in a rotating disc extractor

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