Two-stage process for conversion of alkanes to gasoline

Patent · Tue Aug 22 04:00:00 EDT 1989

OSTI ID:5335753

Harandi, M N; Owen, H

This patent describes an improvement in a two-stage process for upgrading hydrocarbons in at least four reaction zones cooperating to produce gasoline range hydrocarbons from lower alkanes. The reaction zones comprising first reaction zone to crack gas oil range hydrocarbons utilizing a large pore cracking catalyst, a second reaction zone in which the large pore catalyst is oxidatively regenerated, a third reaction zone in which an external catalyst cooler autogeneously cools regenerated catalyst by dehydrogenation of the lower alkane stream to produce an olefinic effluent, and a fourth reaction zone in which the olefinic effluent is oligomerized to the gasoline range hydrocarbons. The improvement comprising: a first stage, comprising utilizing excess heat from the second reaction zone: contacting the hot fluid catalytic cracking catalyst with C/sub 3//sup +/ alkanes in the third reaction zone to provide conversion of the alkanes to olefins which leave the third reaction zone as the olefinic effluent separated from catalyst; returning a specified amount of separate fluid catalytic cracking catalyst from the third reaction zone directly to the first or second reaction zone; a second state comprising passing the olefinic effluent from the third reaction zone to a fourth reaction zone for oligomerizing olefins to gasoline range hydrocarbons contacting the olefinic effluent with a medium pore zeolite catalyst effective; recovering a gasoline range hydrocarbon stream from the effluent of the fourth reaction zone.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4859308
• Application Number: PPN: US 7-144991A
• OSTI ID: 5335753
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALKENES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS OILS
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PRODUCTION
PYROLYSIS
THERMOCHEMICAL PROCESSES
ZEOLITES