Extraction separation of Co(II) from Ni(II) in H2SO4 solutions with carriers in hollow-fiber contactors

Yeh, Jung-Peng; Lin, Su‐Hsia; Chien, Rean‐Der; Chen, Shia‐Chung; Chiao, Hsin-Yi

doi:10.1080/19443994.2013.768364

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…Traditionally, SX is performed in packed columns, centrifugal extractors or mixer-settler tanks. Although these systems have been the workhorses for decades now, important problems such as foaming, flooding, unloading, the need for a density difference and stable emulsion formation still present important disadvantages [4], [5]. The use of membrane contactors offers a route to avoid these problems, as the phases are contacted in a non-dispersive manner [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Separation of Co(II)/Ni(II) with Cyanex 272 using a flat membrane microcontactor: Extraction kinetics study

Hereijgers

Vandermeersch

Oeteren

et al. 2016

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Separation of Co(II)/Ni(II) with Cyanex 272 using a flat membrane microcontactor: Extraction kinetics study

Hereijgers

Vandermeersch

Oeteren

et al. 2016

Journal of Membrane Science

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“…Downside of the membrane contactor is the slow mass transfer. This is generally based on diffusion and as a result such devices require residence times in the range of hours (Yeh et al, 2013a(Yeh et al, , 2013b.…”

Section: Introductionmentioning

confidence: 99%

“…Preferably, this should be accomplished by flowing only once through the membrane contactor. With hollow fibers, for instance, the flow is often recirculated as mass transfer is then high (Aguilar and Cortina, 2008;Drioli et al, 2005;Yeh et al, 2013aYeh et al, , 2013b, but doing so the process becomes discontinuous.…”

Section: Introductionmentioning

confidence: 99%

Separation of Co(II)/Ni(II) with Cyanex 272 using a flat membrane microcontactor: Stripping kinetics study, upscaling and continuous operation

Hereijgers

Vandermeersch

Oeteren

et al. 2016

Chemical Engineering Research and Design

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In the present paper, the impact of the acid concentration, Cyanex 272 concentration, and membrane wetting properties on the stripping kinetics of loaded Cyanex 272 with cobalt is studied in a flat membrane microcontactor. To reduce the environmental impact and to be ever economically viable, the extractant needs to be regenerated. From the observed results, a model was derived to describe the stripping kinetics, enabling to maximize throughput. Like for the extraction of cobalt, also for the reversed reaction (stripping of loaded Cyanex 272 with cobalt), pseudo-first order kinetics could be assumed. However, unlike the extraction of cobalt, the reaction kinetics for the stripping of loaded Cyanex 272 had to be taken into account. As a consequence, the concentration of sulphuric acid influences the stripping kinetics and consequently throughput as well. Furthermore, it was also shown that the concentration of Cyanex 272 affected the stripping rate, in contrast to the extraction of cobalt. While for extraction diffusion in the organic phase can be neglected, this was nog longer the case for stripping. When the concentration of Cyanex 272 was increased, the stripping rate decreased severely. To increase throughput, a scale-up strategy was proposed, that could realized without inducing a loss of efficiency. This was demonstrated by increasing throughput by a ten-fold. Moreover, also the separation efficiency is studied in a continuous operation set-up over a span of 5 hours.

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Extraction separation of Co(II) from Ni(II) in H2SO4 solutions with carriers in hollow-fiber contactors

Cited by 2 publications

References 17 publications

Separation of Co(II)/Ni(II) with Cyanex 272 using a flat membrane microcontactor: Extraction kinetics study

Separation of Co(II)/Ni(II) with Cyanex 272 using a flat membrane microcontactor: Extraction kinetics study

Separation of Co(II)/Ni(II) with Cyanex 272 using a flat membrane microcontactor: Stripping kinetics study, upscaling and continuous operation

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