Fluid catalytic cracking with catalyst stripping zones

Patent · Tue Dec 06 04:00:00 EST 1988

OSTI ID:6337846

Haddad, J H; Owen, H; Schatz, K W

This patent describes a process for fluid catalytic cracking of a hydrocarbon feedstock, comprising: passing a cracking catalyst and feedstock upwardly through a riser conversion zone under fluid catalytic cracking conditions to crack the feedstock and form a mixture of cracking products and catalyst, discharging the mixture at a discharge temperature from the riser; centrifugally separating catalyst from the mixture of cracking products and catalyst, stripping the separated catalyst by contacting it with a stream of stripping gas in a confined preliminary stripping zone, combining the stripping gas from the preliminary stripping zone with the cracking products and passing them to an exit of the preliminary stripping zone, heating the stripped catalyst from the preliminary stripping zone by combining it with regenerated catalyst from a fluid catalytic cracking catalyst regenerator vessel to from combined catalyst, hot stripping the combined catalyst by contact with a stream of stripping gas in a hot stripping zone at a hot stripping temperature between 100/sup 0/F above the discharge temperature and 1500/sup 0/F, the regenerated catalyst having a temperature between 100/sup 0/F above the hot stripping temperature and 1600/sup 0/F, to form hot stripped catalyst and a stream of stripping gas and stripped hydrocarbons.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4789458
• OSTI ID: 6337846
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CATALYTIC CRACKING
CENTRIFUGATION
CHEMICAL REACTIONS
CHEMICAL REACTORS
CRACKING
DECOMPOSITION
DEGASSING
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEATING
HYDROCARBONS
MIXING
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PYROLYSIS
REGENERATION
REMOVAL
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES