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US 8,524,969 B2Granted
Dehydrogenation reactions of hydrocarbons to alkenes
AssigneeFina Technology, Inc.
InventorsJames Butler, Olga Khabashesku, James T. Merrill
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Abstract
A method for the dehydrogenation of hydrocarbons to alkenes, such as n-pentene to piperylene and n-butane to butadiene at pressures less than atmospheric utilizing a dehydrogenation catalyst are disclosed. Embodiments involve operating the dehydrogenation reactor at a pressure of 1,000 mbar or less.
Claims12
A method for the production of alkenes comprising:
- contacting a hydrocarbon feedstock with a dehydrogenation catalyst in a reactor, at a pressure of 1,000 mbar or less, under reaction conditions effective to dehydrogenate at least a portion of said hydrocarbon to produce alkenes;
- operating the dehydrogenation reaction at a steam to hydrocarbon molar ratio of at least 12:1;
- and
- operating the dehydrogenation reaction in a reactor at a temperature of at least 300° C.;
- and
- increasing a temperature of the reactor as needed to keep the hydrocarbon to alkene conversion at least 35%;
- wherein the hydrocarbon to alkene conversion is at least 30%;
- wherein the reactor temperature increase from catalyst deactivation averages no more than 1° C. per day for at least 30 days;
- and wherein the reaction can operate in excess of 30 days before the catalyst is a deactivated catalyst.
6 more elements
Dependencies are inferred from the claim text.