Method of regenerating a cracking catalyst with substantially co

Details Method of regenerating a cracking catalyst with substantially co Method of regenerating a cracking catalyst with substantially co

1975-01-06

1977-02-01

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Solids contacting and mixing

252417, 252419, C10G 1118

Patent

active

040060756

ABSTRACT:
An improved method for the regeneration of catalytic cracking catalyst wherein a regeneration flue gas having a reduced concentration of carbon monoxide, preferably less than 0.05 vol. %, and a regenerated catalyst having a reduced residual carbon content, preferably less than 0.1 wt. %, are obtained by first burning coke from the coke-contaminated catayst at an elevated temperature such that when the coke burned is substantially completely converted to carbon dioxide, the temperature of the fluidized bed in the regeneration zone may then be reduced to a desired operating level while maintaining substantially complete conversion of the carbon to carbon dioxide. This is accomplished by regulating the amount of coke deposited on the catalyst in the reaction zone and adjusting the catalyst circulation rate. Effluent gas from the regeneration zone may be discharged directly to the atmosphere with no discernible effect upon ambient air quality.

REFERENCES:
patent: 2589124 (1952-03-01), Packie
patent: 3012962 (1961-12-01), Dygert
patent: 3206393 (1965-09-01), Pohlenz
patent: 3410793 (1968-11-01), Stranahan et al.
patent: 3629097 (1971-12-01), Smith
patent: 3838036 (1974-09-01), Stine et al.
patent: 3844973 (1974-10-01), Stine et al.

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