Oxydehydrogenation of alkylaromatic hydrocarbons and catalytic c

Details Oxydehydrogenation of alkylaromatic hydrocarbons and catalytic c Oxydehydrogenation of alkylaromatic hydrocarbons and catalytic c

1977-12-19

1979-12-25

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

Having alkenyl moiety, e.g., styrene, etc.

C07C 1500

Patent

active

041806905

ABSTRACT:
Dehydrogenatable alkylaromatic hydrocarbons are oxydehydrogenated by contacting them at oxydehydrogenation conditions with specified amounts of steam and oxygen in the presence of an active and selective catalytic composite comprising a combination of catalytically effective amounts of cobalt oxide, chromium oxide, alumina and magnesium oxide with a silica carrier material. A specific example of the active and selective catalytic composite disclosed herein for use in oxydehydrogenation of alkylaromatic hydrocarbons is a combination of cobalt oxide, chromium oxide, alumina and magnesium oxide with a silica carrier material in amounts sufficient to result in a mole ratio of chromium oxide to cobalt oxide of about 0.2:1 to about 2:1, of alumina to cobalt oxide of about 0.05:1 to about 0.5:1 and of magnesium oxide to cobalt oxide of about 0.05:1 to about 0.5:1. A key feature involves using this catalytic composite in the oxydehydrogenation of dehydrogenatable alkylaromatic hydrocarbons at an inlet reactor temperature greater than 470.degree. C.

REFERENCES:
patent: 3502737 (1970-03-01), Ghublikian
patent: 3941854 (1976-03-01), Franz et al.
patent: 4009218 (1977-02-01), Uitti
patent: 4052338 (1977-10-01), Riesser

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