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US 5,510,553 AGranted
Catalytic dehydrogenation of alkylaromatic hydrocarbons
AssigneeFina Research, S.A.
InventorsLuc F. L. Delorme, Francisco M. M. Cerejo, Jacques F. Grootjans
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Abstract
Alkylaromatic hydrocarbons are dehydrogenated into alkenylaromatic hydrocarbons by contacting them in the absence of molecular oxygen with a supported catalyst of the redox type wherein the metal in the catalyst is at a valency such that it is not in its most reduced state, and the catalyst is regenerated before being contacted with fresh feed.
Claims10
A process for the catalytic dehydrogenation of alkylaromatic hydrocarbons into the corresponding alkenylaromatic hydrocarbons, characterized in that it comprises the steps of:
- a. contacting a hydrocarbon feedstock under dehydrogenation conditions, in the absence of any gas containing molecular oxygen, with a catalyst consisting of a reducible oxide of vanadium, supported on a material selected from the group consisting essentially of metallo silicate zeolite materials and metallo-alumino-phosphate zeolite materials and oxides of a second metal selected from the group consisting essentially of Ti, Zr, Zn, Th, Mg, Ca, Ba, Si and Al;
- said catalyst having a dehydrogenation activity when said vanadium has a valency such that it is not in its most reduced state;
- b. recovering dehydrogenated hydrocarbons;
- c. regenerating the catalyst;
- and,
- d. repeating said steps a and b above.
3 more elements
Dependencies are inferred from the claim text.