Process for reducing flue gas contaminants from fluid cracking catalyst regenerator

Patent · Tue Mar 28 00:00:00 EST 1978

OSTI ID:5068502

Luckenbach, E C

Noxious emissions produced in the process of regenerating catalysts employed in the catalytic cracking of hydrocarbons are reduced by burning the coke on the spent catalyst in a regenerator operated at a temperature greater than 1200/sup 0/F to produce flue gas containing less than 2.0 vol. % carbon monoxide, expanding the flue gas from the regenerator through a turbine to reduce the pressure of the flue gas, recovering and utilizing energy produced from the expansion, introducing the expanded gas into a venturi structure, contacting the expanded gas with a low pressure stream of an aqueous scrubbing mixture, passing the flue gas and the scrubbing mixture through a constricted passage of the venturi structure to increase the turbulence and velocity of the liquid and gaseous streams thereby producing intimate contact thereof, discharging the mixture of gas and scrubbing liquid into a separation zone, and separating the mixture of gas and scrubbing liquid into a liquid portion and a gaseous portion having a reduced content of solid catalytic particulates and acidic gases.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4081508
• OSTI ID: 5068502
• Resource Relation: Patent File Date: Filed date 4 Jun 1975
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
REGENERATION
FLUE GAS
SCRUBBING
HYDROCARBONS
CATALYTIC CRACKING
COKE
COMBUSTION
HIGH TEMPERATURE
MIXTURES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISPERSIONS
GASEOUS WASTES
ORGANIC COMPOUNDS
OXIDATION
PYROLYSIS
WASTES
020800* - Petroleum- Waste Management
020400 - Petroleum- Processing