Mitsubishi Chemical Corporation

Makoto Takiguchi

Tomoatsu Iwakura

Shohei Suzuki

Syuji Obayashi

Hisashi Fujita

Ryozo Hamana

Process for producing styrene

A method for dehydrogenation of a hydrocarbon, which comprises selectively oxidizing hydrogen in a gas mixture which is obtained by subjecting a feed hydrocarbon to a dehydrogenation reaction in the presence of a dehydrogenation catalyst and which comprises a dehydrogenated hydrocarbon, an unreacted feed hydrocarbon and hydrogen, by contacting the gas mixture with an oxygen-containing gas in the presence of an oxidation catalyst, and further subjecting a hydrocarbon-containing gas obtained by the oxidation reaction to a dehydrogenation reaction, wherein a catalyst comprising a component having platinum and/or palladium supported on a carrier obtained by calcining at least one member selected from the group consisting of tin oxide, titanium oxide, tantalum oxide and niobium oxide, at a temperature of from 800.degree. C. to 1,500.degree. C., is used as the oxidation catalyst.

Method for dehydrogenation of hydrocarbon

A catalyst for oxidation of hydrogen, which is characterized in that: A. it is a catalyst having platinum supported on alumina; B. said alumina has a BET specific surface area of from 0.5 to 6 m.sup.2 /g; and C. said alumina has an ammonia adsorption of at most 5 .mu.mol/g, is used at the time of producing an unsaturated hydrocarbon by dehydrogenation of a hydrocarbon, whereby hydrogen present in the gas mixture can selectively be oxidized, and thus, the yield can be improved particularly when styrene is produced by dehydrogenation of ethylbenzene.

Catalyst for oxidation of hydrogen, method for selective oxidation of

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Ibaraki, Japan

Makoto Takiguchi