1-Hexene isomerization and n-hexane cracking over HMCM-22

Isomerization of 1-hexene and cracking of n-hexane over HMCM-22 were carrie d out in a continuous flow glass reactor. The results were compared with th ose obtained over HZSM-5 under similar conditions of conversion. The cataly st HMCM-22 caused much more double bond shift and less skeletal isomerizati on in 1-hexene isomerization than HZSM-5. Also, in n-hexane cracking, HMCM- 22 gave a higher yield of olefins and a lower yield of aromatics than HZSM- 5. The results can be explained on the basis of the lower acidic strength a nd the inferior hydrogen transfer capacity of HMCM-22 compared to those of HZSM-5. (C) 2001 Elsevier Science B.V. All rights reserved.