Experimental Study of the Chemical Equilibria in the Liquid-Phase Dehydration of 1-Pentanol to Di-n-pentyl Ether

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• 作者：Roger Bringu&eacute ; Javier Tejero ; Montserrat Iborra ; Jos&eacute ; Felipe Izquierdo ; Carles Fit&eacute ; Fidel Cunill
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：October 10, 2007
• 年：2007
• 卷：46
• 期：21
• 页码：6865 - 6872
• 全文大小：97K
• 年卷期：v.46,no.21(October 10, 2007)
• ISSN：1520-5045

文摘

The thermodynamic equilibrium of the liquid-phase bimolecular dehydration of 1-pentanol to di-n-pentylether (DNPE) and water was studied in the temperature range of 423-463 K over Amberlyst 70. Furthermore,the equilibrium position of two side reactions could be followed, DNPE decomposition to 1-pentanol and1-pentene and isomerization of 1-pentene to 2-pentene. The etherification reaction proved to be slightlyexothermic, with an enthalpy change of reaction at 298.15 K of -(3.8 ± 0.6) kJ mol^-1. From this value, thestandard formation enthalpy and molar entropy of DNPE were computed to be -(421.1 ± 1.2) kJ mol^-1 and473.71 J (K·mol)^-1, respectively. The enthalpy changes of the reaction of DNPE decomposition to 1-penteneand 1-pentanol and 1-pentene isomerization to 2-pentene were 63.4 ± 0.9 and -19.7 ± 2.1 kJ mol^-1,respectively.