十元环分子筛催化正丁烯骨架异构制异丁烯反应性能研究

 对比了AEL型、TON型和FER型3种十元环分子筛催化正丁烯骨架异构反应性能的差别，探讨了温度和空速对正丁烯转化率、异丁烯选择性和产率的影响。结果表明：AEL型和FER型分子筛适合应用于从正丁烯异构生产异丁烯的工业过程；AEL型分子筛适合于高温、低空速的运行模式，在压力0.25 MPa、温度450 oC、质量空速4 h-1时异丁烯产率为41.4%；而FER型分子筛适合应用于中低温、较高空速的运行模式，在压力0.25 MPa 、温度350 oC 、质量空速6 h-1时异丁烯产率可达45.9%。

STUDY ON SKELETAL ISOMERIZATION OF n-BUTENES INTO ISOBUTENE ON MOLECULAR SIEVE WITH 10 MR PORE STRUCTURES

The AEL-, TON-, and FER-type molecular sieves with 10 MR pore structures were used as the catalysts, and their skeletal isomerization performance of n-butene into isobutene were studied. The effect of temperature and space velocity on the n-butenes conversion, isobutene selectivity and yield was discussed. The results show that the AEL- and FER-type molecular sieves are suitable for the industrial process of isobutene isomerized from n-butene. The AEL-type molecule sieve prefers to be operated at the high temperature and low space velocity mode, and the isobutene yield is 41.4% at a pressure of 0.25 MPa, a temperature of 450 oC and a space velocity of 4 h-1. Whereas the FER-type one prefers to be at the low temperature and high space velocity operation mode, and the maximum isobutene yield reaches 45.9% at a pressure of 0.25 MPa, a temperature of 350 oC and a space velocity of 6 h-1.