Method for oxygen addition to oxidative reheat zone of hydrocarbon dehydrogenation process

Patent · Tue Jul 08 00:00:00 EDT 1986

OSTI ID:5331744

Ward, D J

This patent describes a process for the catalytic dehydrogenation of a C/sub 3/-plus dehydrogenable hydrocarbon wherein a feed stream comprising a feed hydrocarbon is passed into a first bed of dehydrogenation catalyst maintained at dehydrogenation conditions and a dehydrogenation zone effluent stream comprising hydrogen, the feed hydrocarbon and a product hydrocarbon is produced, the dehydrogenation zone effluent stream and an oxygen-containing gas stream are admixed and passed into a separate bed of selective hydrogen oxidation catalyst maintained at oxidation promoting conditions and an oxidation zone effluent stream is produced, and the oxidation zone effluent stream is passed into a second bed of dehydrogenation catalyst. The improvement described here comprises cooling the dehydrogenation zone effluent stream by direct or indirect heat exchange and increasing the amount of heating which is required in the bed of oxidation catalyst over that which would be necessary to achieve the same oxidation zone effluent stream temperature without the cooling.

• Assignee: UOP, Inc., Des Plaines, IL
• Patent Number(s): US 4599471
• OSTI ID: 5331744
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CATALYSIS
CATALYSTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COOLING
DEHYDROGENATION
ELEMENTS
ENERGY TRANSFER
FLUID FLOW
GAS FLOW
HEAT TRANSFER
HEATING
HYDROCARBONS
HYDROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
TEMPERATURE DEPENDENCE
YIELDS