关键词: 固体酸, 烷基化, 异丁烷, 超临界流体, 再生

Abstract: The isobutane/butene alkylation reactions over a solid acid catalyst were carried out under liquid phase and supercritical conditions respectively. Supercritical isobutane fluid regeneration was adopted to recover the activity of partial deactivated catalysts. The influences, such as the composition and phase of the reactivation fluid, regeneration temperature, pressure, fluid space velocity and treating time, on the regeneration were investigated. Results showed that supercritical fluid regeneration was a promising reactivation method for deactivated solid acid alkylation catalyst. For catalyst partially deactivated under liquid phase reaction conditions, when it was regenerated at 180℃, its activity of butene conversion could be totally recovered, and its C8o selectivity could reached 92.8% of that of the fresh catalyst; for catalyst deactivated under supercritical conditions, its C8o selectivity could be recovered to 82.4% of that of the fresh catalyst.

Key words: solid acid, alkylation, isobutane, supercritical fluid, regeneration