Enhancement of 1-Propanol Selectivity in Propene Hydration over Zeolites HNU-3 and HZSM-5

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• 作者：Junfen Li ; Zhangfeng Qin ; Hong Xu ; Mei Dong ; Jinxiang Dong ; Jianguo Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：December 19, 2007
• 年：2007
• 卷：46
• 期：26
• 页码：9000 - 9005
• 全文大小：102K
• 年卷期：v.46,no.26(December 19, 2007)
• ISSN：1520-5045

文摘

Catalytic attempts as well as thermodynamic considerations were employed to explore possible measures forenhancing the yield of 1-propanol in propene hydration. The cost of 1-propanol production may be largelyreduced if it can be produced from the direct hydration of propene. The thermodynamic considerations suggestthat equilibrium distribution of 1- and 2-propanol depends almost solely on reaction temperature; the selectivityof 1-propanol increases linearly with the temperature. Catalytic tests over zeolites HNU-3 and HZSM-5 provethat the reaction behavior is related to the pore structure and surface acidity of zeolites, which could beadjusted through modification with SiCl₄ or NH₄F. Modification of zeolites may suppress the formation ofbyproduct oligomers, but has only limited improvement on 1-propanol yield. Strong acidity of zeolites isfavorable for the hydration to approach the reaction equilibrium, and therefore enhances the selectivity of1-propanol.