Process for reducing coke formation in heavy feed catalytic cracking

Patent · Mon Feb 07 23:00:00 EST 1983

OSTI ID:6410559

Bearden, R; Stuntz, G F

A method for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone is disclosed, 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 adding a hydrogen donor material to the reaction zone and passing the catalyst from the reaction zone 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 4372841
• OSTI ID: 6410559
• 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
CONTAMINATION
CRACKING
DECOMPOSITION
HYDROCARBONS
HYDROGEN TRANSFER
INHIBITION
ORGANIC COMPOUNDS
PASSIVATION
PYROLYSIS
REDUCTION
THERMOCHEMICAL PROCESSES