Cooling exothermic regenerator with endothermic reactions

Patent · Tue Jun 01 04:00:00 EDT 1993

OSTI ID:6511839

Sapre, A V

A fluidized catalytic cracking (FCC) process is described wherein a heavy hydrocarbon feed having a boiling point above about 650 F is catalytically cracked in an FCC unit by direct contact with an inventory of hot regenerated cracking catalyst to lighter products and spent catalyst which is regenerated to produce hot regenerated catalyst, by: a. catalytically cracking the feed in a catalytic cracking reactor operating at conditions to produce a cracking reactor effluent mixture comprising cracked products and spent catalyst containing coke and strippable hydrocarbons; b. separating the cracking reactor effluent mixture into a cracked product rich vapor phase and a solids rich spent catalyst phase comprising strippable hydrocarbons and coked catalyst; c. stripping at least a portion of the spent catalyst phase to produce stripped coked catalyst; d. regenerating at least a portion of the stripped coked catalyst in a catalyst regeneration means to produce hot regenerated catalyst which is recycled to the catalytic cracking reactor; the process characterized by cooling at least a portion of the FCC catalyst inventory by indirect heat exchange against an endothermic chemical reaction in an endothermic cooler having two isolated sections, an FCC catalyst side section and an endothermic cooler reactant side section by: e. removing at least a portion of the FCC catalyst from the FCC unit and charging same to an inlet of the endothermic cooler; f. charging an endothermically reactive reactant selected from the group of ethane, propane, butane, light naphtha, and heavy naphtha to an inlet of the endothermic cooler reactant side of the heat exchange means; g. heating the endothermically reactive reactant, by indirect heat exchange with the FCC catalyst, to a temperature sufficient to drive the endothermic reaction and produce endothermic reaction products which are removed as a product and simultaneously remove heat from the FCC catalyst and produce cooled FCC catalyst.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): A; US 5215650
• Application Number: PPN: US 7-807004
• OSTI ID: 6511839
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
BOILING POINTS
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CHEMICAL REACTORS
CRACKING
DECOMPOSITION
ENERGY RECOVERY
ENERGY SOURCES
ENERGY TRANSFER
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
HEAT RECOVERY
HEAT TRANSFER
PETROLEUM
PHYSICAL PROPERTIES
PYROLYSIS
REGENERATION
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VISCOSITY
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION