Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-08-04
1979-11-20
Dees, Carl
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252457, 252458, B01J 2906
Patent
active
041750586
ABSTRACT:
An active and selective catalytic composite, useful for oxydehydrogenating dehydrogenatable alkylaromatic hydrocarbons comprises 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: 2793194 (1957-05-01), Hervert et al.
patent: 2861945 (1958-11-01), Kearby et al.
patent: 3089908 (1963-05-01), Schult et al.
patent: 4124537 (1978-11-01), Gembicki et al.
Dees Carl
Hoatson Jr. James R.
McBride Thomas K.
Page II William H.
UOP Inc.
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