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AssigneeDow Global Technologies LLC
InventorsSameer S. Bharadwaj, Joseph J. Maj, Jonathan H. Siddall, Mark D. Bearden, Craig B. Murchison, Gerald E. Lazaruk
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A process and catalyst for the partial oxidation of paraffinic hydrocarbons, such as ethane, propane, naphtha, and natural gas condensates, to olefins, such as ethylene and propylene. The process involves contacting a paraffinic hydrocarbon with oxygen in the presence of hydrogen and a catalyst under autothermal process conditions. Preheating the feed decreases oxygen consumption and increases the net hydrogen balance. The catalyst comprises a Group 8B metal, preferably, a platinum group metal, and at least one promoter selected from Groups 1B, 6B, 3A, 4A, and 5A, optionally supported on a catalytic support, such as magnesia or alumina. In preferred embodiments, the support is pretreated with a support modifier selected from Groups 1A, 2A, 3B, 4B, 5B, 6B, 1B, 3A, 4A, 5A, the rare earth lanthanides, and the actinides. A modified fluidized bed reactor is disclosed for the process.
A process of preparing an olefin comprising contacting a paraffinic hydrocarbon or a mixture of paraffinic hydrocarbons, said paraffinic hydrocarbon having from 2 to about 25 carbon atoms, with oxygen in the presence of hydrogen and a catalyst, the contacting being conducted in a reactor under autothermal process conditions sufficient to prepare a product stream containing the olefin, the catalyst comprising a platinum group metal and a least one promoter wherein the process is conducted at a temperature greater than 750° C. and less than 1,150° C.
A process for preparing an olefin comprising contacting a paraffinic hydrocarbon or a mixture of paraffinic hydrocarbons, said paraffinic hydrocarbon having from 2 to about 25 carbon atoms, with oxygen in the presence of hydrogen and a catalyst, the contacting being conducted in a reactor under autothermal process conditions sufficient to prepare a product stream containing the olefin, the catalyst comprising a platinum group metal and at least one promoter, wherein the catalyst is prepared by a process comprising pretreating a catalyst support with a support modifier, depositing the platinum group metal and at least one promoter onto the pretreated support, optionally calcining the support, and thereafter reducing the metal-loaded support.
Dependencies are inferred from the claim text.