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Smetana, Jiri F.; Falconer, John L.; Noble, Richard D.
Journal of membrane science, 05/1996, Letnik: 114, Številka: 1Journal Article
Methyl ethyl ketone (MEK) was preferentially removed from equeous solutions by pervaporation through a silicalite-1 zeolite membrane at 34°C. Feed concentrations between 0.8 and 15.4 wt% MEK were used, and the azeotrope concentration was surpassed in the permeate above 5% MEK in the feed. The MEK fluxes increased from 0.06 to 0.36 kg/(m 2 h) over this range and the separation factors were between 70 and 146. Separation factors for the silicalite membrane were considerably higher than those for single stage distillation. A silicalite membrane that does not have good N 2 SF 6 pure gas permeance ratio (equal to 14) is shown to obtain high separation factors for liquids.
