工业级原料合成ZSM-35分子筛催化剂及其正丁烯骨架异构制异丁烯的应用

Synthesis of ZSM-35 by Industrial Materials and Its Application in n-Butene Skeletal Isomerization

本文以实验室小试ZSM-35分子筛合成配方为基础,采用工业级原料对ZSM-35分子筛进行了小规模放大合成,考察了工业级原料对ZSM-35分子筛理化特性及正丁烯骨架异构制异丁烯反应性能的影响。XRD、N2吸附-脱附表征结果表明,以工业级原料可以重复实验室小试合成结果,分子筛结晶度及酸性几乎保持不变,表面硅铝比略有升高。反应结果表明工业级原料合成的分子筛反应性能明显优于小试结果,异丁烯选择性升高且丙烯及重组分收率明显降低。

ZSM -35 catalysts for n -butene skeletal isomerization reaction were scaled up using industrial materials on the basis of lab tests. The catalysts were characterized by XRD, N2 adsorption - desorption, XPS and NH3 - TPD. The results showed that the ZSM -35 could be completely reproduced by using industrial materials. The crystallinity and the acidity remained the almost the same though the surface SiO2/Al2O3 ratio slightly increased. The catalysts showed better catalytic results. The selectivity of iso - butene increased while the selectivity of propene and liquid products decreased.