In the catalyst preparation process, nitrogen oxides were not released. It is a green environment-friendly preparation method.
并且制备过程不排放氮氧化合物，是一种绿色环保的制备方法。
The process to prepare alkyl naphthalene by alkylation is the most ripe one, key technology of which is preparation of high efficient catalyst.
烷基化制备烷基萘是目前最成熟的工艺路线，其关键技术是高效催化剂的制备；
Based on the preparation process of original catalyst for propylene polymerization, a new catalyst for the propylene polymerization was prepared by adding some modifier.
在原聚丙烯合成催化剂的基础上，通过在制备过程中加入调节剂，制备了一种新型催化剂。
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