Patent ID: 8524969
Filing Date: 2013-09-03
Classification: C07C

Abstract:
1. 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.