【摘要】 研究了HY分子筛催化邻苯二酚与环己酮、丁酮、丙酮、丙醛、丁醛、异丁醛、戊醛、异戊醛、正己醛、正辛醛、苯甲醛、二苯甲酮等十余种醛(酮)的缩合反应。考察了反应时间、酚与醛(酮)的配比、HY分子筛用量等因素对酚与醛(酮)反应的影响。实验发现,当邻苯二酚与醛(酮)摩尔比为1∶1.0、催化剂用量为每mol邻苯二酚2.5g、反应4h,选择性一般在97%以上,醛(酮)的转化率一般在57%以上,表明HY分子筛对邻苯二酚与醛(酮)的反应有较好的催化性能。更多还原

【Abstract】 The acetalization and ketalization of various aldehydes and ketones with catechol by using HY zeolite as catalyst were studied. Effect of reaction time, mole ratio of reactants and amount of catalyst on yield of benzodioxoles were investigated. The results showed that HY was an efficient catalyst for the acetalization and ketalization with high conversion and selectivity in mild conditions.The optimum reaction condition is: molar ratio of catechol to aldehydes or ketones 1∶1.0, catalyst amount 2.5g/1mol catechol,reaction time 4h. Under those conditions, conversion and selectivity were over 57% and 97%, respectively.更多还原