Kinetics of the Liquid Phase Dehydration of 1-Octanol to Di-n-Octyl Ether on Amberlyst 70

被引：6
作者：
Casas, Carlos [1 ]
Bringue, Roger [1 ]
Fite, Carles [1 ]
Iborra, Montserrat [1 ]
Tejero, Javier [1 ]
机构：
[1] Univ Barcelona, Fac Chem, Dept Chem Engn, E-08028 Barcelona, Spain
来源：
AICHE JOURNAL | 2017年 / 63卷 / 09期
关键词：
reaction kinetics; 1-octanol dehydration; di-n-octyl ether; Amberlyst; 70; reaction rate inhibition by water; TERT-BUTYL ETHER; SHEET SILICATES; EXCHANGE-RESINS; ETHANOL; ALCOHOLS; ETHERIFICATION; 1-PENTANOL; BUTANOL; WATER; EQUILIBRIUM;
D O I：
10.1002/aic.15741
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The kinetics of the liquid phase dehydration of 1-octanol to di-n-octyl ether (DNOE) over Amberlyst 70 was studied at 413-453 K. 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), in line with literature data on homologous reactions. (C) 2017 American Institute of Chemical Engineers
引用
收藏
页码：3966 / 3978
页数：13
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