Process for regenerating fluidizable particulate cracking catalysts

Patent · Tue Jun 09 04:00:00 EDT 1981

OSTI ID:6242269

Mayes, W W

A process and apparatus for regenerating fluidizable particulate cracking catalysts wherein a mixture of spent catalyst particles contaminated with carbonaceous deposits from a catalytic cracker and sufficient hot regenerated catalyst particles to bring the temperature of the mixture to the minimum temperature at which rapid oxidation of the carbonaceous deposits will be induced, are entrained in a high velocity gas stream containing sufficient oxygen to oxidize substantially all of the carbonaceous deposits on the spent catalyst particles to carbon dioxide and carbon monoxide and the resulting dilute phase catalyst particle stream is passed upwardly through a primary regeneration zone wherein the carbonaceous deposits are oxidized and the catalyst particles regenerated to a carbon content of less than 0.1%; the catalyst particles being passed to a dense phase fluidized bed of regenerated particles in a secondary regeneration zone where the combustion heat is absorbed by the particles and residual carbon monoxide is oxidized to carbon dioxide to produce flue gases containing less than 1,500 ppm carbon monoxide.

• Assignee: Cosden Technology Inc
• Patent Number(s): US 4272402
• OSTI ID: 6242269
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
COKE
CRACKING
DECOMPOSITION
DEPOSITS
ENERGY SOURCES
FLUIDIZED BED
FOSSIL FUELS
FUELS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
PROCESSING
PYROLYSIS
REFINING
REGENERATION
THERMOCHEMICAL PROCESSES