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离子液体对甲基丙烯醛催化合成甲基丙烯酸甲酯的影响
Authors
李桂花
王安峰
Publication date
1 January 2005
Publisher
Abstract
将离子液体应用于甲基丙烯醛(MAL)催化合成甲基丙烯酸甲酯(MMA)的反应中,催化剂为Pd_5Bi_2PbFe/CaCO_3时,考察了离子液体的性质、用量及重复使用时对反应的影响。结果表明,仅类似于1-丁基-3-甲基咪唑六氟磷酸盐([bmim]PF_6)的低粘度憎水性的离子液体适用于该反应,同时循环使用时,活性基本没有降低。在反应体系中加入5%(体积分数)的[bmim]PF_6时,MAL 的转化率为96.2%,MMA 的选择性达98.7%。将离子液体应用于其他几种不饱和羧酸酯的合成过程,产率均大于89%
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Last time updated on 09/11/2016