Recovery of acetonitrile from aqueous waste by a combined process: Solvent extraction and batch distillation

Acosta-Esquijarosa, Jhoany; Rodríguez-Donis, Ivonne; Jäuregui‐Haza, Ulises; Nuevas-Paz, Lauro; Pardillo-Fontdevila, Eladio

doi:10.1016/j.seppur.2006.03.018

Cited by 42 publications

(40 citation statements)

References 4 publications

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“…4 It is a medium-polarity solvent that is miscible with water in all proportions, and thus finds effective use in laboratories. 4 It is a medium-polarity solvent that is miscible with water in all proportions, and thus finds effective use in laboratories.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it is immiscible with saturated hydrocarbons; hence, it is commonly used as an HPLC mobile phase. 7 To separate the water/acetonitrile mixture, heterogeneous distillation, 8,9 extractive distillation, and solvent extraction 4 have been used. 6 Acetonitrile forms azeotropes with water, the mixture having a boiling point of 76.5 C and containing approximately 82.2 wt % acetonitrile under atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

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Pervaporation Dehydration of Azeotropic Water/Acetonitrile Mixture Using High Water Affinity PVA–PVAm Blended Membrane

Chaudhari

Kwon

Shon

2019

Bulletin Korean Chem Soc

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Acetonitrile and water forms an azeotropic mixture having a boiling point of 76.5 C and containing approximately 82.2 wt % acetonitrile under atmospheric pressure. Accordingly for their separation, heterogeneous distillation, extractive distillation, and solvent extraction have been used. The recovery of solvent and solute from the extract phase can usually be done by additional distillation processes, which ultimately lead to a less economical and energy intensive pathway. The hydrophilic polymers, poly(vinyl alcohol) and poly(vinyl amine) were used to prepared blended membrane and crosslinked them using glutaraldehyde as crosslinking agent. The FTIR, XRD, DSC, SEM, and swelling studies techniques were used to characterize all the blended membranes and applied for pervaporation separation of water/acetonitrile feed mixtures. Comparison of pervaporation data with water-acetonitrile vapor-liquid equilibrium data confirmed that the membrane acted as a third phase to effectively break azeotropes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pervaporation Dehydration of Azeotropic Water/Acetonitrile Mixture Using High Water Affinity PVA–PVAm Blended Membrane

Chaudhari

Kwon

Shon

2019

Bulletin Korean Chem Soc

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“…The ED process is widely used among process to separate azeotropic mixtures because of low energy consumption and the flexible selection of possible entrainers (Mahdi et al, 2015). Acosta-Esquijarosa et al (2006) studied the recovery of acetonitrile from its aqueous solution by combining solvent extraction and batch distillation process with butyl acetate as solvent. Liang et al (2014) optimized the conventional ED process for acetonitrilewater separation with ethylene glycol (EG) as entrainer by sequential iterative optimization procedure, and the process energy cost was reduced by 16% through combining the pre-concentration column with a preset distillate output and entrainer recovery column.…”

Section: Introductionmentioning

confidence: 99%

Optimization of pre-concentration, entrainer recycle and pressure selection for the extractive distillation of acetonitrile-water with ethylene glycol

You

Gerbaud

et al. 2018

Chemical Engineering Science

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“…Kotai et al [22] compared the conventional batch extractive distillation with the hybrid process (absorption + distillation) suggested by Duessel and Stichlmair [23]. Acosta-Esquijarosa et al [24] studied the sequential combination of liquid-liquid extraction and batch distillation both experimentally and by simulation. Steger et al [25] proposed a new variant of batch extractive distillation, the inverse-fed batch extractive distillation, where the total amount of the entrainer is pre-loaded to the still, and the mixture to be separated is continuously fed to the column.…”

Section: Introductionmentioning

confidence: 99%

Generalised model for heteroazeotropic batch distillation with variable decanter hold-up

Hégely

Gerbaud

Lang

2013

Separation and Purification Technology

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. hold-up. (2013) Separation and Purification Technology, vol. 115. pp. 9-19. ISSN 1383-5866 Any correspondance concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr t r a c tA general model of batch heteroazeotropic distillation is proposed. Both liquid phases present in the decanter can be refluxed or withdrawn as distillate, their hold-up can be increased, decreased or kept constant, as well. By assuming maximal separation, that is, that the composition of the condensate always equals to that of the heteroazeotrope, the still path equation was derived. The still path directions are determined for all the 16 possible operational policies. It is possible to steer the still path in a desired direction by changing the operational parameters, which allows the recovery of a pure component in the still. The still path directions are validated by rigorous simulations for three policies not published yet using the mixture water -formaldehyde -propyl formate. From the 16 operational policies, 11 can be considered as useful in practice. To demonstrate the advantage of using a non-traditional policy, the separation of the mixture aniline -ethylene glycol -water was investigated, as well. By using a non-traditional operational policy with hold-up reduction in the decanter a higher purity of ethylene glycol was obtained in the still.

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Recovery of acetonitrile from aqueous waste by a combined process: Solvent extraction and batch distillation

Cited by 42 publications

References 4 publications

Pervaporation Dehydration of Azeotropic Water/Acetonitrile Mixture Using High Water Affinity PVA–PVAm Blended Membrane

Pervaporation Dehydration of Azeotropic Water/Acetonitrile Mixture Using High Water Affinity PVA–PVAm Blended Membrane

Optimization of pre-concentration, entrainer recycle and pressure selection for the extractive distillation of acetonitrile-water with ethylene glycol

Generalised model for heteroazeotropic batch distillation with variable decanter hold-up

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