Pervaporative Dehydration of Organic Solvents

Pervaporative separation of acetone/water and isopropanol (IPA)/water systems has been studied in the water-lean range of composition of the feed mixtures. Poly(vinyl alcohol) (PVA) membranes crosslinked with citric acid, adipic acid, maleic acid, glutaraldehyde, and glyoxal were used for this purpo...

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Bibliographic Details
Published in:Separation science and technology 1997-01, Vol.32 (8), p.1335-1349
Main Authors: Burshe, M. C., Netke, S. A., Sawant, S. B., Joshi, J. B., Pangarkar, V. G.
Format: Article
Language:English
Subjects:
Acetone
Applied sciences
Chemical engineering
Crosslinking
Dehydration
Exact sciences and technology
Isopropanol
Membrane separation (reverse osmosis, dialysis...)
Pervaporation
Poly(vinyl alcohol)
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Summary:Pervaporative separation of acetone/water and isopropanol (IPA)/water systems has been studied in the water-lean range of composition of the feed mixtures. Poly(vinyl alcohol) (PVA) membranes crosslinked with citric acid, adipic acid, maleic acid, glutaraldehyde, and glyoxal were used for this purpose. The sorption characteristics of all the membranes indicate that these membranes have a good sorption selectivity for water in view of the hydrophilic nature of PVA. The type of crosslinker used for crosslinking has been shown to have an important bearing on the permeation characteristics of the membranes. Thus, the trifunctional citric acid yields the highest selectivity but lowest flux. A comparison of the productive capacities of the various membranes indicates that the glutaraldehyde crosslinked membrane has the maximum productive capacity for IPA dehydration whereas maleic acid crosslinked membrane yields the highest productive capacity for acetone dehydration.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496399708000964