环己酮和甘油在碳基固体酸催化剂上的缩合反应

通过膨化淀粉和对甲基苯磺酸混合物的部分炭化制备碳基固体酸催化剂,用XRD、红外光谱、元素分析和热分析进行了表征,研究了碳基固体酸催化剂在环己酮甘油缩酮合成中的催化性能,考察环己酮与甘油摩尔比、催化剂用量和反应时间等因素的影响。XRD分析和酸碱电位滴定结果表明,膨化淀粉和对甲基苯磺酸混合物部分炭化生成含有高密度-SO3H基团的芳香碳薄层组成的无定形炭。在n（环己酮）∶n（甘油）为1∶1.2、催化剂的质量分数为10%、环己烷15mL和回流反应时间为120min的条件下,环己酮甘油缩酮的收率可达到99.2%。催化剂重复使用6次后,活性下降很小。

Study on Condensation of Cyclohexanone with Glycerol Catalyzed by Carbon-based Solid Acid

Amorphous carbon material prepared from expanded starch and p-toluene sulfonic acid has been examined as a novel strong solid acid catalyst.The catalytic performances were studied on condensation of cyclohexanone with glycerol.The effects of molar ratio of glycerol with cyclohexanone,catalyst concentration and reaction time were discussed.The results of XRD and acid-base titration indicated the incompletely carbonization of the mixtures of expanded starch and p-toluene sulfonic acid results in amorphous car...