Dehydrocyclization with an acidic sulfur-free multimetallic cata

Details Dehydrocyclization with an acidic sulfur-free multimetallic cata Dehydrocyclization with an acidic sulfur-free multimetallic cata

1977-10-13

1979-01-23

Davis, C.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Reforming

2606735, C10G 3508

Patent

active

041360176

ABSTRACT:
Dehydrocyclizable hydrocarbons are converted to aromatics by contacting them at dehydrocyclization conditions with an acidic sulfur-free multimetallic catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a rhenium component, a cobalt component, a germanium component, and a halogen component with a porous carrier material. The platinum group, rhenium, cobalt, germanium and halogen components are present in the multimetallic catalyst in amounts respectively, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 2 wt. % rhenium, about 0.1 to about 5 wt. % cobalt, about 0.001 to about 1 wt. % germanium, and about 0.1 to about 3.5 wt. % halogen. Moreover, the catalytically active sites induced by these metallic components are uniformly dispersed throughout the porous carrier material and these metallic components are present in the catalyst in carefully controlled oxidation states such that substantially all of the platinum group component is in the elemental metallic state, substantially all of the germanium component is in an oxidation state above that of the elemental metal, and substantially all of the rhenium and catalytically available cobalt components are in the elemental metallic state or in a state which is reducible to the elemental metallic state under dehydrocyclization conditions, or in a mixture of these states. A specific example of the dehydrocyclization method disclosed herein is a method for converting a feed mixture of n-hexane and n-heptane to a product mixture of benzene and toluene which involves contacting the feed mixture and a hydrogen stream with the acidic sulfur-free multimetallic catalyst disclosed herein at dehydrocyclization conditions.

REFERENCES:
patent: 4036742 (1977-07-01), Antos

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