ZSM-35分子筛催化醚后C4烯烃骨架异构反应性能及稳定性研究

摘要

The synthesized ZSM-35 zeolite catalyst was characterized by X-ray diffraction (XRD),scanning electron microscope (SEM),etc,and with etherificated C4 as raw material,reaction performances and long-run stability of ZSM-35 zeolite catalyst for catalytic etherificated C4 olefin skeleton isomerization were investigated.The results showed that ZSM-35 zeolite had high crystallinity feature,and under the conditions of reaction pressure 0.5 MPa,reaction temperature 290-320℃,mass space velocity 1.0-2.0h-1,mass fraction of isobutene increased from 0.36% to 17.00%,which could meet alkene content requirement of methyl tertiary butyl ether.%采用X射线衍射仪(XRD)、电子扫描显微镜(SEM)等方法对合成的ZSM-35分子筛进行了表征,并以醚后C4为原料,考察了ZSM-35分子筛催化剂催化醚后C4烯烃骨架异构的反应性能和催化剂的长周期稳定性.结果表明,ZSM-35分子筛具有结晶度高的特点,在反应压力为0.5MPa,反应温度为290～320℃,质量空速为1.0～2.0h-1的条件下,产品中异丁烯的质量分数从0.36%增加到17.00%,满足了甲基叔丁基醚反应活性烯烃的含量要求.