【摘要】 研究了Hβ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、Hβ分子筛用量等因素对邻苯二酚与醛(酮)反应的影响。结果表明,当醛(酮)与乙二醇摩尔比为1:1.4,催化剂用量为2g/1mol醛(酮),反应2h,选择性一般在98%以上,转化率也一般在90%以上,表明,Hβ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 variou s aldehydes and ketones with catechol by using Hβ as catalyst were studied. Effect of reaction time ,mole ratio of reactants and amount of catalyst on yield of Benzodioxoles were investigated. Results show that Hβ was an efficient catalyst for the acetalization and ketalization with high conversion and selectivity in mild conditions.The best reaction condition: molar ratio of catechol to aldehydes or ketones was 1:1.4,catalyst amount was 3.5g/1mol catechol,reaction time was 5h.Under that condition,conversion was over 90.4% and selectivity was over 99.6%.更多还原