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Kinetics of the liquid phase dehydration of 1-octanol to di-n-octyl ether on Amberlyst 70
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The kinetics of the liquid phase dehydration of 1-octanol to di-n-octyl ether (DNOE) over Amberlyst 70 was studied at 413-453K. Mechanistic rate models assuming water and 1-octanol adsorbed on the resin, and the free sites fraction negligible, were selected from 1-octanol dehydration experiments. Next, the influence of DNOE, water and 1,4-dioxane (solvent) concentration was evaluated. DNOE and 1,4-dioxane do not affect significantly the reaction rate, while water inhibits it strongly. Water effect was quantified by splitting the rate constant into a 'true one' and a correction factor related to the fraction of active sites blocked by water. The best kinetic model stemmed from an Eley-Rideal mechanism with water adsorbed onto the resin and DNOE released directly to the liquid phase, with a correction factor for water inhibitory effect based on a Freundlich isotherm-like function; activation energy being 110±5 kJ·mol-1 based in line with literature data on homologous reactions.
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CASAS FERNÁNDEZ, Carlos, et al. Kinetics of the liquid phase dehydration of 1-octanol to di-n-octyl ether on Amberlyst 70. AIChE Journal. 2017. Vol. 63, num. 9, pags. 3966-3978. ISSN 0001-1541. [consulted: 29 of June of 2026]. Available at: https://hdl.handle.net/2445/115030