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Pervaporation separation of ethanol–water mixtures using crosslinked blended polyacrylic acid (PAA)–nylon 66 membranes

Authors

  • X. P. Zhao,

    1. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada
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    • Organic Division Number One, Chemical Technical Research Institute Anhui Province, Hefei, Anhui, People's Republic of China.

  • R. Y. M. Huang

    1. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada
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Abstract

The pervaporation separation of ethanol–water mixtures was carried out through a series of ionically crosslinked polyacrylic acid (PAA)–nylon 66 blended membranes crosslinked to varying degrees in aluminum nitrate solution. Optimum pervaporation results were obtained from crosslinked blends containing 75 wt % nylon 66 and 25 wt % PAA. The optimum crosslinking time was found to be between 30 and 40 h. The optimum operating temperatures of the pervaporation runs were found to be 2–3°C below the boiling points when the highest permeation flux reached 857.6 (g/m2 h) and the best separation factors (water/ethanol) were 10.1.

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