Reforming with multimetallic catalysts

Details Reforming with multimetallic catalysts Reforming with multimetallic catalysts

1977-12-19

1979-04-17

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252439, 208139, B01J 2702, C10G 3506

Patent

active

041499913

ABSTRACT:
A process for desensitizing a hypersensitive, high activity reforming catalyst for suppression of hydrogenolysis which is particularly acute during the early portion of the period that the catalyst is placed on stream, i.e., at the startup of a reactor. The catalyst is constituted of a composite which includes a Group VIII noble metal hydrogenation-dehydrogenation component, notably platinum, iridium or rhenium, and tellurium. Hydrogenolysis is suppressed by incorporating within such reforming catalyst at the time of its preparation an element, or a compound or salt of tellurium. In another of its aspects the present invention embodies a reforming catalyst or catalyst composite comprising a refractory or inorganic oxide support material, particularly alumina, a Group VIII noble metal hydrogenation-dehydrogenation component, notably platinum, to which iridium or rhenium, and tellurium have been added to promote the activity and selectivity of the catalysts, and said catalyst is prepared by a method wherein tellurium is introduced into and deposited throughout said support. Suitably, the reforming catalyst, or composite also contains a halogen component, particularly chlorine and preferably the tellurium component is introduced into the support, or catalyst, by impregnating with a solution comprising an element, salt, acid or compound of tellurium.

REFERENCES:
patent: 2851399 (1958-09-01), Brennan et al.
patent: 3884799 (1975-05-01), Mahoney et al.
patent: 3983054 (1976-09-01), Fattore et al.

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