Dehydrogenation catalysts

A dehydrogenation catalyst comprising from about 40 to about 90 weight percent iron oxide calculated as Fe2O3, from about 5 to about 20 weight percent of an alkali metal compound calculated as an alkali metal oxide, from about 1 ppm to about 1000 ppm of a source of palladium or platinum selected from the group consisting of elemental palladium, elemental platinum, compounds containing palladium, compounds containing platinum and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound, calculated as MoO3 or WO3 and from about 4.0 to about 12.0 weight percent of a cerium compound, calculated as CeO2, wherein all weight percents are based on the total weight of the catalyst.

A dehydrogenation catalyst comprising from about 40 to about 90 weight percent iron oxide calculated as Fe2O3, from about 5 to about 20 percent of a potassium compound calculated as potassium oxide, from about 1.0 ppm to about 1000 ppm of a source for platinum or palladium selected from the group consisting of elemental platinum, elemental palladium, compounds containing platinum, compounds containing palladium and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound calculated as MoO3 or WO3, from about 4.0 to about 12.0 weight percent of a cerium compound calculated as CeO2, from about 0.2 to about 10.0 weight percent of a calcium or magnesium compound calculated as an oxide, from about 100 ppm to about 2000 ppm of a chromium compound calculated as Cr2O3, and from about 10 ppm to about 1000 ppm of a source for titanium calculated as TiO2, wherein all weight percents are based on the total weight of the catalyst.

A process for non-oxidative dehydrogenation of a hydrocarbon feed stream consisting essentially of an alkylaromatic hydrocarbon and steam comprising passing the hydrocarbon feed stream over a dehydrogenation catalyst comprising about 30 to about 90 weight percent of an iron compound calculated as an Fe2O3, about 1 to about 50 weight percent of an alkali metal source calculated as an alkali metal oxide, about 0.1 ppm to about 5000 ppm of at least one of a palladium or platinum source selected from the group consisting of elemental palladium, elemental platinum, compounds containing palladium, compounds containing platinum and combinations thereof, wherein all weight percents are based on the total weight of the catalyst.

A process for non-oxidative dehydrogenation of a hydrocarbon feed stream consisting essentially of an alkylaromatic hydrocarbon and steam comprising passing the hydrocarbon feed stream over a dehydrogenation catalyst comprising from about 40 to about 90 weight percent iron oxide calculated as Fe2O3, from about 5 to about 20 weight percent of an alkali metal compound calculated as an alkali metal oxide, from about 1 ppm to about 1000 ppm of a source of palladium or platinum selected from the group consisting of elemental palladium, elemental platinum, compounds containing palladium, compounds containing platinum and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound, calculated as MoO3 or WO3 and from about 4.0 to about 12.0 weight percent of a cerium compound, calculated as CeO2, wherein all weight percents are based on the total weight of the catalyst.

A process for non-oxidative dehydrogenation of a hydrocarbon feed stream consisting essentially of an alkylaromatic hydrocarbon and steam comprising passing the hydrocarbon feed stream over a dehydrogenation catalyst comprising from about 40 to about 90 weight percent iron oxide calculated as Fe2O3, from about 5 to about 20 percent of a potassium compound calculated as potassium oxide, from about 1.0 ppm to about 1000 ppm of a source for platinum or palladium selected from the group consisting of elemental platinum, elemental palladium, compounds containing platinum, compounds containing palladium and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound calculated as MoO3 or WO3, from about 4.0 to about 12.0 weight percent of a cerium compound calculated as CeO2, from about 0.2 to about 10.0 weight percent of a calcium or magnesium compound calculated as an oxide, from about 100 ppm to about 2000 ppm of a chromium compound calculated as Cr2O3, and from about 10 ppm to about 1000 ppm of a source for titanium calculated as TiO2, wherein all weight percents are based on the total weight of the catalyst.

A process for non-oxidative dehydrogenation of a hydrocarbon feed stream consisting essentially of ethylbenzene and steam comprising passing the hydrocarbon feed stream over a dehydrogenation catalyst comprising about 30 to about 90 weight percent of an iron compound calculated as an Fe2O3, about 1 to about 50 weight percent of an alkali metal source calculated as an alkali metal oxide, about 0.1 ppm to about 5000 ppm of at least one of a palladium or platinum source selected from the group consisting of elemental palladium, elemental platinum, compounds containing palladium, compounds containing platinum and combinations thereof, wherein all weight percents are based on the total weight of the catalyst.

A process for non-oxidative dehydrogenation of a hydrocarbon feed stream consisting essentially of ethylbenzene and steam comprising passing the hydrocarbon feed stream over a dehydrogenation catalyst comprising from about 40 to about 90 weight percent iron oxide calculated as Fe2O3, from about 5 to about 20 weight percent of an alkali metal compound calculated as an alkali metal oxide, from about 1 ppm to about 1000 ppm of a source of palladium or platinum selected from the group consisting of elemental palladium, elemental platinum, compounds containing palladium, compounds containing platinum and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound, calculated as MoO3 or WO3 and from about 4.0 to about 12.0 weight percent of a cerium compound, calculated as CeO2, wherein all weight percents are based on the total weight of the catalyst.

A process for non-oxidative dehydrogenation of a hydrocarbon feed stream consisting essentially of ethylbenzene and steam comprising passing the hydrocarbon feed stream over a dehydrogenation catalyst comprising from about 40 to about 90 weight percent iron oxide calculated as Fe2O3, from about 5 to about 20 percent of a potassium compound calculated as potassium oxide, from about 1.0 ppm to about 1000 ppm of a source for platinum or palladium selected from the group consisting of elemental platinum, elemental palladium, compounds containing platinum, compounds containing palladium and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound calculated as MoO3 or WO3, from about 4.0 to about 12.0 weight percent of a cerium compound calculated as CeO2, from about 0.2 to about 10.0 weight percent of a calcium or magnesium compound calculated as an oxide, from about 100 ppm to about 2000 ppm of a chromium compound calculated as Cr2O3, and from about 10 ppm to about 1000 ppm of a source for titanium calculated as TiO2, wherein all weight percents are based on the total weight of the catalyst.