Upgrading naphtha in a multiple riser fluid catalytic cracking operation employing a catalyst mixture

Patent · Tue May 16 04:00:00 EDT 1989

OSTI ID:5792145

Herbst, J A; Owen, H; Schipper, P H

A process is described for producing gasoline comprising contacting a hydrocarbon feed having an initial boiling-point of at least 400/sup 0/F., a 50% boiling of at least 500/sup 0/F. and an end boiling point of at least 600/sup 0/F., in a first riser, with a two component catalyst under fluid catalytic cracking conditions. At least one component of the catalyst is stripped in a stripping unit to remove entrained hydrocarbons, and regenerated wherein the two component catalyst comprises a first catalyst component selected from the group consisting of an amorphous cracking catalyst and a large pore cracking catalyst, whereby a product comprising olefins and naphtha is produced. Ethylene introduced together with the two component catalyst to a second riser, for contacting ethylene with a second catalyst component which is a shape selective medium pore crystalline silicate zeolite to produce products heavier than ethylene and to increase the temperature of the catalyst to an optimum temperature for upgrading naphtha; and naphtha is introduced to the second riser, down stream of the point of ethylene introduction, for contact with the catalyst at the optimum temperature and the naphtha is upgraded to gasoline product.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4830728
• OSTI ID: 5792145
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL TAR OILS
CRACKING
DECOMPOSITION
DISTILLATES
ENERGY SOURCES
ETHYLENE
FOSSIL FUELS
FUELS
GASOLINE
HYDROCARBONS
LIQUID FUELS
NAPHTHA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PRODUCTION
PYROLYSIS
SILICATES
SILICON COMPOUNDS
THERMOCHEMICAL PROCESSES