The liquid-phase Prins condensation between i-butene and formaldehyde was studied over parent and Mg-modified MFI and BEA zeolites with low Si/Al ratios. High catalytic activity and selectivity toward isoprene were obtained using the H-BEA zeolite. The H-MFI zeolite was confirmed as a highly selective catalyst for 3-methylbut-3-ene-1-ol production via Prins condensation. The influence of Mg-ion-exchange treatment on the catalytic behavior of the zeolites was studied; modification of BEA led to significant changes in the catalytic behavior, while Mg-MFI and H-MFI showed similar conversion of formaldehyde and similar product distribution.

中文翻译：

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的普林斯缩合之间我丁烯和甲醛在液相改性BEA和MFI沸石

液相普林斯缩合之间我丁烯和甲醛进行了研究过亲和Mg修饰的MFI和BEA沸石具有低Si / Al比。使用H-BEA沸石可获得高催化活性和对异戊二烯的选择性。证实H-MFI沸石是通过Prins缩合生产3-甲基丁-3-烯-1-醇的高选择性催化剂。研究了镁离子交换处理对沸石催化性能的影响。BEA的改性导致催化行为发生重大变化，而Mg-MFI和H-MFI显示出相似的甲醛转化率和相似的产物分布。