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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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固载化zncl2催化合成3-甲基-3-丁烯-1-醇
, PP. 1146-1152
Keywords: prins反应,甲醛,异丁烯,3-甲基-3-丁烯-1-醇,sio2-zncl2(silzic)
Abstract:
？采用碾磨-活化法制备了sio2-zncl2(silzic)催化剂,并将其用于异丁烯与甲醛prins缩合合成3-甲基-3-丁烯-1-醇(mboh)。系统研究了温度、物料比、时间和催化剂的组成及用量对该反应的影响。结果表明,在不同的条件下,甲醛都保持着99%以上的高转化率;然而,不同的条件对mboh的选择性和收率的影响程度不同,其中,反应温度、催化剂的酸量是影响该反应的关键因素;物料比和反应时间对mboh的选择性和收率的影响相对较小。实验得到最佳的反应条件为,反应温度210℃、二氧六环8g、三聚甲醛1.5g、n(异丁烯)/n(三聚甲醛)=7:1、30mg1mmol/gsilzic和反应时间2h,在此条件下mboh的选择性和收率可分别达到93.8%和93.4%。当催化剂循环使用五次时,mboh的收率降为85.2%,表明该催化剂具有一定的重复使用性。
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