SORPTION OF ETHYL BUTYRATE AND OCTANAL CONSTITUENTS OF ORANGE ESSENCEBY POLYMERIC ADSORBENTS

Sorption characteristics, rates and capacities of polymeric adsorbents (XAD-4, XAD-7, XAD-16, Duolite ES-865, Duolite S-761, Porapak-Q and X US-43436) for ethyl butyrate and octanal were determined using model s olutions. Sorption of these two principal components of aqueous orange essence, was evaluated utilizing the Freundlich isotherm model. Break through curves were determined using XAD-16 as adsorbent. Tle capacity of XAD-16 for ethyl butyrate in the column system was 426 +/- 12 mg/g . There was no column breakthrough for octanal even after 130 bed volu mes. Most (91.4%) of the adsorbed ethyl butyrate was eluted from XAD-1 6 resin by 95% ethanol elution. Recovery of adsorbed octanal from the resin was 66.4%.