Pervaporative separation of carboxylic acid-water mixtures

Kabra, M.M.; Netke, S.A.; Sawant, S.B.; Joshi, Jyeshtharaj B.; Pangarkar, Vishwas G.

doi:10.1016/0956-9618(95)00129-8

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…In other systems, fluxes increased with decreasing molecular size, showing that diffusion was more important (Isci et al, 2006;Kabra, Netke, Sawant, Joshi, & Pangarkar, 1995).…”

Section: Effect Of Molecular Weight On Fluxmentioning

confidence: 94%

“…However, the feed concentration (10%, w/w) was much greater than in the present study. Kabra et al (1995) also stated that diffusivity depends not only on molecular size and shape, but also on the extent to which the permeating molecules aggregate inside the membrane. It is possible that this could explain the results obtained in the present study, where acid flux increased and then decreased with molecular weight, because small acids might have aggregated together (as they are hydrophilic and so do not associate easily with the hydrophobic membrane), and hence formed clusters that did not diffuse through the membrane easily, because their apparent size was larger than permeants that diffused through as single molecules.…”

Section: Acidsmentioning

confidence: 97%

“…Kabra et al (1995) found that the flux of acids (acetic, propanoic and butanoic) through a PDMS membrane decreased with molecular size. However, the feed concentration (10%, w/w) was much greater than in the present study.…”

Section: Acidsmentioning

confidence: 98%

See 2 more Smart Citations

Concentration of dairy flavour compounds using pervaporation

Overington

Wong

Harrison

et al. 2008

International Dairy Journal

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“…In other systems, fluxes increased with decreasing molecular size, showing that diffusion was more important (Isci et al, 2006;Kabra, Netke, Sawant, Joshi, & Pangarkar, 1995).…”

Section: Effect Of Molecular Weight On Fluxmentioning

confidence: 94%

Section: Acidsmentioning

confidence: 97%

See 1 more Smart Citation

Concentration of dairy flavour compounds using pervaporation

Overington

Wong

Harrison

et al. 2008

International Dairy Journal

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“…These membranes have polydimethylsiloxane-like structures and SFs of 1.5–5.2 [ 194 ]. Pervaporative separation of aqueous solutions of propionic, butyric and iso-butyric acid has been studied using plain and filled silicone rubber membranes [ 195 ]. A novel silicone rubber membrane was prepared by crosslinking silylstyrene-oligomer containing -SiH groups with divinyl-polydimethylsiloxane using Karstedt’s catalyst at room temperature for separation of organics from water [ 196 ].…”

Section: Membranes For Pv Applicationsmentioning

confidence: 99%

Polymeric Nanocomposite Membranes for Next Generation Pervaporation Process: Strategies, Challenges and Future Prospects

Roy

Singha²

2017

Membranes

105

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Pervaporation (PV) has been considered as one of the most active and promising areas in membrane technologies in separating close boiling or azeotropic liquid mixtures, heat sensitive biomaterials, water or organics from its mixtures that are indispensable constituents for various important chemical and bio-separations. In the PV process, the membrane plays the most pivotal role and is of paramount importance in governing the overall efficiency. This article evaluates and collaborates the current research towards the development of next generation nanomaterials (NMs) and embedded polymeric membranes with regard to its synthesis, fabrication and application strategies, challenges and future prospects.

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“…34 The butyric acid selectivity was much higher than those obtained by polymer membranes. 13,40 However, the performance of the TLA/ OA membrane was not as stable for butyric acid as for acetic acid. The permeate concentration, permeation flux, and selectivity significantly decreased, and the water permeation flux significantly increased overnight.…”

Section: Stability Of Slmpv Process For Acetic Acidmentioning

confidence: 99%

Pervaporation Membranes That Are Highly Selective for Acetic Acid over Water

Qin

Sheth

Sirkar

2003

Ind. Eng. Chem. Res.

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Supported liquid membrane pervaporation (SLMPV) is a pervaporation process for separating volatile organic compounds (VOCs) from their dilute aqueous solution. It simultaneously integrates extraction of the VOCs from the aqueous solution with flash distillation of the VOCs from the organic phase. By using a liquid membrane consisting of reactive extractants, pervaporation of primarily acetic acid from its aqueous solutions was studied. Limited studies of butyric acid were also done. Among various extractants tested, trioctylamine (TOA) and tridodecylamine demonstrated better performances. The SLM is permselective for acetic acid and butyric acid. The acetic acid selectivity can be as high as 33 for a feed of 1 M at 60°C, an order of magnitude higher than that obtained by any solid polymeric membrane reported in the literature. The simple SLM system demonstrated long-term stability; for example, decreases of about 30% in both pervaporation flux and selectivity were observed over an operational period of 500 h. A new technique of continuous on-line regeneration of the LM during operation maintains completely stable operational performance.

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Pervaporative separation of carboxylic acid-water mixtures

Cited by 8 publications

References 6 publications

Concentration of dairy flavour compounds using pervaporation

Concentration of dairy flavour compounds using pervaporation

Polymeric Nanocomposite Membranes for Next Generation Pervaporation Process: Strategies, Challenges and Future Prospects

Pervaporation Membranes That Are Highly Selective for Acetic Acid over Water

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