Abstract:
A novel catalytic composition comprises a Group VIII metal, rhenium, and selenium deposited on a solid catalytic support comprising a refractory inorganic oxide. The preferred Group VIII metal is platinum and the preferred inorganic oxide is catalytically active alumina. This catalyst may be used in a process for reforming petroleum hydrocarbon fractions. The reforming process comprises contacting a petroleum hydrocarbon fraction in a reforming zone under reforming conditions and in the presence of hydrogen with the novel catalyst to obtain high octane blending components. In this process, the catalyst need not receive a sulfur pretreatment either prior to initial operation or after each regeneration of the catalyst. Advantageously, neither sulfiding of the catalyst nor sulfur distribution on the catalyst need be considered.
Abstract:
There is provided a process for the reforming of a petroleum hydrocarbon stream, which process comprises contacting said hydrocarbon stream in a reforming zone under suitable reforming conditions and in the presence of hydrogen with a catalyst comprising a component having hydrogenation-dehydrogenation activity and dehydrocyclization activity, a suitable support, and as a promoter a small amount of technetium. The support may comprise alumina and the component having hydrogenationdehydrogenation activity and dehydrocyclization activity may be a member selected from the group consisting of one or more metals of Group VIA, compounds of one or more metals of Group VIA, and combinations thereof. The preferred Group VIA metal is chromium. The catalyst may comprise also a second member selected from the group consisting of an oxide of an alkali metal, an oxide of alkaline earth metal, and mixtures thereof.