Abstract: SQ401 dehydrogenation catalyst developed by China University of Petroleum (Beijing) and produced by Dongying K&T New Material Co., Ltd and its industrial application in a 100 kt/a fixed-bed dehydrogenation unit in Shandong Lushenfa Chemical Co., Ltd were introduced. The industrial application results showed that the SQ401 catalyst has a relatively high isobutane conversion, isobutene selectivity and stability. The overall isobutene conversion during the dehydrogenation process is 16.56% and the overall isobutene selectivity is 92.59%. The yield of isobutene is 15.34%, fully meeting the demand of MTBE production unit. In addition, the regeneration scheme was revamped, resulting in a shorter regeneration time from 4 days to 2 days, and higher production efficiency.

Key words: iso-butane, dehydrogenation, SQ401 catalyst, isobutene