Reforming with multimetallic catalysts

Details Reforming with multimetallic catalysts Reforming with multimetallic catalysts

1977-12-19

1979-04-10

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252439, 208139, B01J 2702, C10G 3506

Patent

active

041487583

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 start-up 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 a sulfurous acid or sulfuric acid component. Hydrogenolysis is suppressed by incorporating within such reforming catalyst at the time of its preparation a sulfurous acid or sulfuric acid component. 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 a sulfurous acid or sulfuric acid component have been added to promote the activity and selectivity of the catalysts, and said catalyst is prepared by a method wherein the sulfurous acid or sulfuric acid component is introduced into and deposited throughout said support. Suitably, the reforming catalyst, or composite also contains a halogen component, particularly chlorine and preferably the sulfurous acid or sulfuric acid component is introduced into the support, or catalyst, by impregnating with a liquid solution which contains one or both of these compounds.

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

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