Continuous-flow process for the separation of cesium from complex waste mixtures

S. M. Ponder; R. Helkowski; T. E. Mallouk

doi:10.1021/ie001058p

Continuous-flow process for the separation of cesium from complex waste mixtures

S. M. Ponder, R. Helkowski, T. E. Mallouk

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

A continuous-flow process is proposed for the separation of Cs from complex, strongly alkaline, aqueous mixtures. This process, which includes the use of tetraphenylborate (TPB) anions to precipitate cesium from the bulk waste, minimizes the exposure time of TPB to the alkaline mixture by injecting TPB as a countercurrent into a small stream of the bulk waste and immediately following with filtration. The recovered solids are dissolved in propylene carbonate, and cesium is then extracted into an aqueous solution, to be later recovered as CsNO₃, in a three-phase liquid - liquid - liquid extraction. Minimizing the time of exposure of TPB to strong (2 M) sodium hydroxide avoids the decomposition of TPB and subsequent release of benzene into the atmosphere above the reaction vessel.

Original language	English (US)
Pages (from-to)	3384-3389
Number of pages	6
Journal	Industrial and Engineering Chemistry Research
Volume	40
Issue number	15
DOIs	https://doi.org/10.1021/ie001058p
State	Published - Jul 15 2001

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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10.1021/ie001058p

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title = "Continuous-flow process for the separation of cesium from complex waste mixtures",

abstract = "A continuous-flow process is proposed for the separation of Cs from complex, strongly alkaline, aqueous mixtures. This process, which includes the use of tetraphenylborate (TPB) anions to precipitate cesium from the bulk waste, minimizes the exposure time of TPB to the alkaline mixture by injecting TPB as a countercurrent into a small stream of the bulk waste and immediately following with filtration. The recovered solids are dissolved in propylene carbonate, and cesium is then extracted into an aqueous solution, to be later recovered as CsNO3, in a three-phase liquid - liquid - liquid extraction. Minimizing the time of exposure of TPB to strong (2 M) sodium hydroxide avoids the decomposition of TPB and subsequent release of benzene into the atmosphere above the reaction vessel.",

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T1 - Continuous-flow process for the separation of cesium from complex waste mixtures

AU - Ponder, S. M.

AU - Helkowski, R.

AU - Mallouk, T. E.

PY - 2001/7/15

Y1 - 2001/7/15

N2 - A continuous-flow process is proposed for the separation of Cs from complex, strongly alkaline, aqueous mixtures. This process, which includes the use of tetraphenylborate (TPB) anions to precipitate cesium from the bulk waste, minimizes the exposure time of TPB to the alkaline mixture by injecting TPB as a countercurrent into a small stream of the bulk waste and immediately following with filtration. The recovered solids are dissolved in propylene carbonate, and cesium is then extracted into an aqueous solution, to be later recovered as CsNO3, in a three-phase liquid - liquid - liquid extraction. Minimizing the time of exposure of TPB to strong (2 M) sodium hydroxide avoids the decomposition of TPB and subsequent release of benzene into the atmosphere above the reaction vessel.

AB - A continuous-flow process is proposed for the separation of Cs from complex, strongly alkaline, aqueous mixtures. This process, which includes the use of tetraphenylborate (TPB) anions to precipitate cesium from the bulk waste, minimizes the exposure time of TPB to the alkaline mixture by injecting TPB as a countercurrent into a small stream of the bulk waste and immediately following with filtration. The recovered solids are dissolved in propylene carbonate, and cesium is then extracted into an aqueous solution, to be later recovered as CsNO3, in a three-phase liquid - liquid - liquid extraction. Minimizing the time of exposure of TPB to strong (2 M) sodium hydroxide avoids the decomposition of TPB and subsequent release of benzene into the atmosphere above the reaction vessel.

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JO - Industrial and Engineering Chemistry Research

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Continuous-flow process for the separation of cesium from complex waste mixtures

Abstract

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