Use of lift gas in an FCC reactor riser
A process for converting normally liquid hydrocarbons with an active fluid catalytic cracking catalyst which comprises: passing an upflowing suspension of hot regenerated active fluid catalytic cracking catalyst in a lift gas comprising hydrocarbons including not more than 10 mole % C/sub 3/ and heavier hydrocarbons through a lower portion of a vertically orientated riser conversion zone at a velocity of from about 1.8 to less than 12.2 meters per second, and for a residence time from about 0.5 to about 15 seconds, the ratio of catalyst to hydrocarbon in said lift gas being greater than 80; and introducing the normally liquid hydrocarbons into the upflowing suspension at a locus in the riser conversion zone downstream of the lower portion to form a catalyst-hydrocarbon mixture wherein the temperature and residence time are sufficient to effect the desired conversion. The process is particularly useful for the treatment of a heavy residual feedstock.
- Assignee:
- JOP Inc.
- Patent Number(s):
- US 4479870
- OSTI ID:
- 5980570
- Resource Relation:
- Patent File Date: Filed date 29 Feb 1984; Other Information: PAT-APPL-584681
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROCARBONS
CATALYTIC CRACKING
CATALYSTS
PETROLEUM RESIDUES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PYROLYSIS
THERMOCHEMICAL PROCESSES
020400* - Petroleum- Processing