Dehydrogenation catalysts
AssigneesNissan Girdler Catalysts Co., Ltd., United Catalysts Inc.
InventorsDavid Williams, Yuji Mishima, Andrzej Rokicki, Kazuhiko Shinyama, Dennis Smith
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Abstract
A catalyst for the production of alkenylaromatics from alkylaromatics, wherein the catalyst is predominantly iron oxide, an alkali metal compound and less than about 100 ppm of a source for a noble metal, such as palladium, platinum, ruthenium, rhenium, osmium, rhodium or iridium. Additional components of the catalyst may include compounds based on cerium, molybdenum, tungsten and other such promoters. Also a process for the production of alkenylaromatics from alkylaromatics using this catalyst.
Claims48
A non-oxidative dehydrogenation catalyst for dehydrogenating a hydrocarbon feed stream in a hydrocarbon reactin zone, wherein the components of the hydrocarbon feed stream in the reaction zone consist essentially of an alkylaromatic hydrocarbon and steam, wherein the composition of the catalyst comprises 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 1000 ppm of a noble metal source selected from the group consisting of elemental noble metals, compounds containing noble metals and combinations thereof, wherein all weight percents are based on the total weight of the catalyst.
A non-oxidative dehydrogenation catalyst for dehydrogenating a hydrocarbon feed stream in a hydrocarbon reaction zone, wherein the components of the hydrocarbon feed stream in the reaction zone consist essentially of an alkylaromatic hydrocarbon and steam, wherein the composition of the catalyst comprises 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 100 ppm of a source of noble metal source selected from the group consisting of an elemental noble metals, compounds containing a noble metal and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum to 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 non-oxidative dehydrogenation catalyst for dehydrogenating a hydrocarbon feed stream in a hydrocarbon reaction zone, wherein the components of the hydrocarbon feed stream in the reaction zone consist essentially of an alkylaromatic hydrocarbon and steam, wherein the composition of the catalyst comprises 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 0.1 ppm to about 20 ppm of a noble metal source selected from the group consisting of an elemental noble metal, compounds containing a noble metal and combinations thereof, from about 0.5 to about 10.0 weight percent of a molybdenum or tungsten compound calculated as MoO3 or WO31 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.
Dependencies are inferred from the claim text.