Thermally stable ion-exchange resins as catalysts for the liquid-phase dehydration of 1-pentanol to di-n-pentyl ether (DNPE)
- 作者：Roger Bringué ; Montserrat Iborra ; Javier Tejero ; José ; Felipe Izquierdo ; Fidel Cunill ; Carles Fité ; and Victor J. Cruz
- 关键词：DNPE ; Amberlyst 70 ; Amberlyst 36 ; NR50 ; H-Beta ; 1-Pentanol ; Dehydration reaction ; ISEC characterization of ion-exchangers
- 刊名：Journal of Catalysis
- 出版年：2006
- 期刊代码：97_00219517
- 类别：ce
- 出版时间：15 November 2006
- 卷：244
- 期：1
- 页码：33-42
- 文件大小：486 K
摘要
Conversion, selectivity, yield, and kinetics of the liquid-phase dehydration of 1-pentanol to di-n-pentyl ether (DNPE) were determined at 403–463 K on a recently developed sulfonated resin, Amberlyst 70, which is thermally stable up to 473 K. The behavior of Amberlyst 70 was compared with that of Nafion resin NR50, an H-Beta zeolite, and styrene-divinylbenzene resins stable up to 423 K (i.e., Amberlyst 36 and CT-224). Amberlyst 70 was found to be the most suitable catalyst for this application, showing the highest conversion and yield, with a selectivity to DNPE 93%, despite the fact that NR50 showed the highest selectivity to ether at 423–463 K. The kinetic study reveals that a model stemming from an ER mechanism in which 1-pentanol from the liquid phase reacts with 1-pentanol adsorbed on a single center to give ether adsorbed on a single site represents data on each catalyst. The activation energy was computed to be in the range 110–120 kJ/mol on all the catalysts.