因此本课题的目的首先在于选择合适的分子筛催化剂，通过对其改性，在适宜的条件下由异丁烯和甲醛的普林斯缩合反应来合成异戊二烯。
The first purpose of this paper is to select a suitable molecular sieve catalyst , through its modification , to synthesis of isoprene via Prins condensation of isobutene and formaldehyde under appropriate conditions .
普林斯反应