Process for reducing coke formation in heavy feed catalytic cracking

Patent · Tue Oct 11 04:00:00 EDT 1983

OSTI ID:5499203

Bearden, R Jr; Stuntz, G

A method is disclosed for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone, where the feedstock contains at least two metal contaminants selected from the class consisting of nickel, vanadium and iron, and where these contaminants become deposited on the catalyst. The method comprises passing catalyst from the reaction zone through a regeneration zone operated under net reducing conditions and through a reduction zone maintained at an elevated temperature for a time sufficient to at least partially passivate the catalyst.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4409093
• OSTI ID: 5499203
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
COKE
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROGEN TRANSFER
ORGANIC COMPOUNDS
PASSIVATION
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
PRODUCTION
PYROLYSIS
REGENERATION
THERMOCHEMICAL PROCESSES