Separation of Ethanol/Water (Azeotropic mixture) by Pervaporation using PVA Membrane

Kanse, Nitin G.; Dawande, S. D.

doi:10.1016/j.matpr.2017.06.412

Cited by 13 publications

(2 citation statements)

References 8 publications

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“…To reach this goal, a series of membranes based on poly(vinyl alcohol) crosslinked by different oxalic acid amounts were prepared by a solvent casting method and characterized by differential scanning calorimetry (DSC). It is well known from the literature [40,41] that a membrane made of poly(vinyl alcohol) (PVA) is very selective for extracting water from alcohols or other organic products. As long as we are dealing with a reaction mixture that contains n-butylamine, benzaldehyde, water, n-butyl-1-phenylmethanimine, and methanol as solvent, all these components except water are not appreciated by the membrane.…”

Section: Introductionmentioning

confidence: 99%

Breaking the Equilibrium and Improving the Yield of Schiff Base Reactions by Pervaporation: Application to a Reaction Involving n-butylamine and Benzaldehyde

Al Khulaifi,

AlShehri,

Al-Qadsy

et al. 2023

Separations

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A comparative study of a Schiff base reaction involving benzaldehyde and n-butylamine was carried out to improve the yield of the resulting imine. This reaction was carried out at different temperatures without and with the elimination of the water produced during the process by the pervaporation (PV) technique using a typical cylindrical cell. To reach this goal, different dense membranes made of crosslinked poly(vinyl alcohol) with different oxalic acid (crosslinker) contents were prepared by the solvent casting method. Different parameters influencing the performance of the membrane in the separation process including swellability, diffusivity, crosslinking density, and thermal properties were investigated. The total and partial cumulative transmembranar fluxes as well as the separation factor were studied and the separation process was monitored by HPLC analysis. The n-butyl-1-phenylmethanimine produced was characterized by FTIR and 1HNMR analyses. The results obtained were a clear improvement in the yield of the reaction. For example, the yield obtained from the Schiff base reaction occurring without assistance by PV varied from 58 to 84 wt% when the temperature changed from 5 to 45 °C. On the other hand, when the PV process was used to eliminate water from this reaction mixture, the yield went from 90.4 to 98.6% by weight in this same temperature order. The cumulative total and partial fluxes significantly decreased with time. On the other hand, the separation factor reached a maximum at about one hour at 5, 15, and 45 °C. At 25 °C, the maximum total flux was reached at about 2 h of the PV process. The best selectivity of the PVA-0.5 membrane with regard to water was obtained at 15 °C. It was also revealed from the results obtained that the cumulative total and partial flux decreased rapidly with time and the separation factor reached a maximum at one hour into the PV process, in which 1.51 × 104 was reached at 15 °C, 6.25 × 103 and 3.50 × 103 at one hour of the separation process, and 10.23 × 103 at 25 °C at 2 h of the water removal by PV.

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Section: Introductionmentioning

confidence: 99%

Breaking the Equilibrium and Improving the Yield of Schiff Base Reactions by Pervaporation: Application to a Reaction Involving n-butylamine and Benzaldehyde

Al Khulaifi,

AlShehri,

Al-Qadsy

et al. 2023

Separations

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“…In practice, there are wide uses in various industries, for example in the pharmaceutical [6,7] and petrochemical [8] industries, in solvent and detergents production [9], etc. They are most commonly used to dehydrate organic substances that form azeotropic mixtures with water, such as ethanol [10,11], methanol [6], or isopropyl alcohol [12]. Pervaporation is also used for the desalination of seawater [13], wastewater treatment [14], or relatively recently for the selective separation of mixtures [15].…”

Section: Introductionmentioning

confidence: 99%

Separation of Trimethyl Borate from a Liquid Mixture by Pervaporation

et al. 2019

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Four commercial polyvinyl alcohol (PVA) and polydimethylsiloxane (PDMS) membranes were applied to the pervaporation of an azeotropic mixture containing trimethyl borate, a precursor to boronic acids used in Suzuki couplings and a gaseous anti‐oxidant in solder flux or brazing. The degree of cross‐linking of the chains in the active layer played a crucial role in the membrane process using the membranes PERVAP 4155‐80, PERVAP 4155‐40 and PERVAP 4155‐30. PERVAP 4155‐30 reached the best results from all tested membranes; an impressive selectivity with fast permeation was also achieved with the PERVAP 4060 membrane. Methanol preferentially passed through PERVAP 4155‐30, but trimethyl borate was favorably pervaporated from the mixture by PERVAP 6040, due to the diverse affinities of the membranes.

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Breaking of Butyric Acid–Water Azeotrope: Experimental Analysis on Air Gap Membrane Distillation

Kholapure,

Singh,

Upadhyaya

et al. 2024

Lecture Notes in Civil Engineering

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Separation of Ethanol/Water (Azeotropic mixture) by Pervaporation using PVA Membrane

Cited by 13 publications

References 8 publications

Breaking the Equilibrium and Improving the Yield of Schiff Base Reactions by Pervaporation: Application to a Reaction Involving n-butylamine and Benzaldehyde

Breaking the Equilibrium and Improving the Yield of Schiff Base Reactions by Pervaporation: Application to a Reaction Involving n-butylamine and Benzaldehyde

Separation of Trimethyl Borate from a Liquid Mixture by Pervaporation

Breaking of Butyric Acid–Water Azeotrope: Experimental Analysis on Air Gap Membrane Distillation

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