PROCESS FOR REGENERATING A DEACTIVATED REFORMING CATALYST

摘要

1356974 Reforming hydrocarbons SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 27 July 1971 [29 July 1970] 35213/71 Heading C5E [Also in Division B1] Hydrocarbon feeds are hydroconverted in the presence of a catalyst comprising an oxidic refractory support, at least one noble metal of Group VIII, at least one additional metal having a Pauling electronegativity of between 1À6 and 2À0 and at least one halogen, the catalyst being regenerated when it becomes de-activated during the conversion process by a specified method (see Division B1). Specified hydroconversion processes are dehydrogenation and dehydrocyclization of paraffins, dehydrogenation of naphthenes and, in particular, reforming. Conditions specified for dehydrocyclization of paraffins to aromatics are 399-649‹ C. and a pressure of 0À14 kg./cm.2 to 7 kg./cm.2 Conditions specified for reforming are 399-649‹ C., a pressure of 7-42 kg./cm.2, a LHSV of 0À1 to 10 and a hydrogen/feed molar ratio of 2 : 1 to 12 : 1. In the example a naphtha feed is reformed to give a debutanized product of F-1 octane number using a catalyst comprising alumina, platinum, rhenium and chlorine. The process is carried out in a two-reactor system at 17À5 and 14 atmos. pressure, a hydrogen/oil molar ratio of 7À0 : 1 to 8À0 : 1, a space velocity of 2À0 and a temperature of 493-516‹ C., the catalyst being used both fresh and in the regenerated state.