Octane catalytic cracking process

Patent · Tue Jan 28 04:00:00 EST 1986

OSTI ID:5944616

Pafford, B J; Bertsch, C F

This patent describes a method for cracking a hydrocarbon feedstock to lower molecular weight products in a cracking system. It consists of a reaction zone, a regeneration zone, and a passivation zone. The procedure is as follows: (a) feedstock containing metal contaminant is passed to the reaction zone which has a cracking catalyst where the feedstock is cracked to lower molecular weight products and coke, coke and metal contaminant become deposited on the catalyst; (b) coke and metal contaminated catalyst is passed from the reaction zone to a regeneration zone where coke is removed from the catalyst to regenerate the catalyst; and, (c) regenerated catalyst from the regeneration zone is passed through a passivation zone prior to return to the reaction zone, the improvement includes: (i) monitoring the octane level of the cracked product; and (ii) adjusting the metal contaminant level on the catalyst to maintain the octane level within a predetermined range by the addition to the cracking system of metal contaminated equilibrium cracking catalyst possessing a higher equivalent nickel content than the cracking catalyst in the reaction zone.

• Assignee: Exxon Res. and Eng. Co., Florham Park, NJ
• Patent Number(s): US 4566966
• OSTI ID: 5944616
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
COKE
CRACKING
DECOMPOSITION
ELEMENTS
EQUILIBRIUM
HYDROCARBONS
METALS
MOLECULAR WEIGHT
MONITORING
NICKEL
OCTANE
ORGANIC COMPOUNDS
PASSIVATION
PYROLYSIS
QUANTITY RATIO
REGENERATION
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS