Patent ID: 6392113
Filing Date: 2002-05-21
Classification: C07C,Y02P

Abstract:
A catalytic endothermic process for dehydrogenating hydrocarbons comprising the steps of:a. heating an oxygen-containing gas; b. passing said heated oxygen-containing gas through a first bed of dehydrogenation catalyst to both provide heat to said dehydrogenation catalyst for the endothermic dehydrogenation and to regenerate said catalyst by oxidizing carbonaceous deposits and thereby providing a first effluent gas; c. preheating said hydrocarbon to a desired reaction temperature; d. passing said preheated hydrocarbon through an unheated prereactor dehydrogenation catalyst bed wherein the exothermic heat of the dehydrogenation reaction therein is provided by said preheated hydrocarbon and said hydrocarbon is partially dehydrogenated and cooled below said desired reaction temperature; e. reheating said cooled partially dehydrogenated hydrocarbon to said desired reaction temperature; f. passing said reheated partially dehydrogenated hydrocarbon through said heated and regenerated first bed of dehydrogenation catalyst whereby said hydrocarbon is further dehydrogenated and said first bed of dehydrogenation catalyst is cooled.