丙烯水合醚化反应过程中丙酮生成机理的研究  

Study on Reaction Mechanism of Acetone Formation during Propene Hydration-Etherification

作　　者：刘金龙[1] 王国良[1] 沙颖逊[2] 吕自力[2] 殷元骐[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州731000 [2]中国石油化工股份有限公司洛阳石油化工工程公司炼制研究所,河南洛阳471003

出　　处：《催化学报》2002年第2期127-129,共3页

摘　　要：在与色 质联用仪相连的微反装置上 ,考察了Hβ沸石及改性的Hβ沸石催化剂上丙烯水合醚化及异丙醇脱水的反应行为 .丙烯水合醚化反应中有副产物丙酮生成 ,而异丙醇单独进料时产物中没有发现丙酮的生成 .这表明丙酮并不是异丙醇氧化脱氢的结果 ,而是一个应予重视的不利于丙烯水合醚化的副反应 .用同位素示踪反应对丙酮的生成机理进行了探讨 。Propene hydration-etherification and isopropanol dehydration reactions catalyzed by beta zeolite were investigated using microreactor equipped with GC-MS. It was shown that there was by-product acetone in the products of propene hydration-etherification, while there existed no acetone in the products of isopropanol dehydration reaction. The results showed that the by-product acetone does not result from oxido-dehydrogenation of isopropanol. It is worth noticed that the formation of acetone is an unfavorable side-reaction. The isotopically labeled reaction of D2O and propene indicated that there is one deuterium atom in the formed acetone molecule. The reaction mechanism of acetone formation duing propene hydration-etherification is similar to that of propene oxidation to acetone catalyzed by mixed metal oxide. The above results can offer useful information for developing a new catalyst with function of inhibiting the acetone formation.

关 键 词：Β沸石 丙烯 水合醚化 二异丙醚 丙酮 反应机理 异丙醇 脱水反应 催化剂 汽油添加剂 生成机理 

分 类 号：O643.3[理学—物理化学]