【摘要】 将国产粒状强酸性阳离子交换树脂S - 5 4制成柱状催化剂 ,在其作用下 ,以乙醇和叔丁醇为原料 ,于常压液相条件下合成乙基叔丁基醚 (ETBE) .考察了温度、催化剂用量、反应物初始摩尔比以及水的存在等因素对反应速度的影响 ,建立了一个 7参数动力学模型 ,模型与实验数据吻合较好 .并将柱状和粒状S - 5 4树脂对该反应体系的催化效果进行了比较更多还原

【Abstract】 Cylindrical pellet catalyst was made from strong acid cation exchange resin S-54 particles. Ethyl tert butyl ether (ETBE) was synthesized with this kind of catalyst by using ethanol (EtOH) and tert butyl alcohol (TBA) as the starting materials. Experiments were carried out in the liquid phase under atmospheric pressure with a stirred batch reactor. Mechanism studies have shown that three reactions (dehydration of TBA, EtOH with TBA, and isobutene(IB) with EtOH) take place simultaneously. It was found that catalyst size and stirring speed had no significant effect on reaction rate. Other influence factors, such as temperature, catalyst amount, molar ratio of ethanol to tert butyl alcohol and the effect of water inhibition on synthesis reaction were studied. A kinetics model, which included seven parameters, was obtained by curve fitting method. The experimental results agreed well with the model. The kinetics parameters of pellets catalyst was compared with particles catalyst. While the catalytic activity of pellets catalyst was lower than particles catalyst for the reason of the shield action of binder, however, it would be useful in the larger scale production of更多还原