Catalytic cracking process utilizing an iso-olefin enhancer catalyst additive

Patent · Tue Aug 10 04:00:00 EDT 1993

OSTI ID:6061802

Haag, W O; Harandi, M N; Owen, H

A fluid catalytic cracking process is described for upgrading C[sub 9] + aromatic containing feeds to produce gasoline, distillate, and C[sub 4] olefins, including 1-butene, cis-2-butene, trans-2-butene, in a fluid catalytic cracking unit which includes a riser, a stripping unit and a regenerator, wherein the process comprises: (a) cracking a C[sub 9] + containing feed, selected from the group consisting of gas oil, resid and admixtures thereof, in a riser in the presence of a first catalyst component, under fluid catalytic cracking conditions, wherein the first catalyst component comprises an amorphous cracking catalyst, a large pore crystalline cracking catalyst or admixtures thereof, to provide gasoline boiling range components, and an amount of C[sub 4] olefins in a first product mixture; wherein the fluid catalytic cracking conditions include a riser top temperature within the range of from 950-1,150 F, a catalyst to feed ratio from 3:1-10:1, and a catalyst contact time from 0.5-10 seconds; (b) contacting said first product mixture with a second catalyst component which comprises ZSM-23, under conditions effective to increase isomerization, with no significant oligomerization to heavier molecules, of at least one of C[sub 4] olefins to 2-methylpropene, with no significant oligomerization to heavier molecules, and recovering a second product mixture which contains amounts of 2-methylpropene greater than that in the first effluent, wherein the conditions of the vapor phase catalytic isomerization of the 1-butene, cis-2-butene, and trans-2-butene to the isobutylene include a temperature within the range of from 950-1,150 F, a catalyst to feed ratio of from 3:1-10:1, and a catalyst contact time from 0.5-10 seconds.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): US 5234575; A
• Application Number: PPN: US 7-738370
• OSTI ID: 6061802
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
BUTENES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISPERSIONS
DISTILLATES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS OILS
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
ISOMERS
LIQUID FUELS
LOADING RATE
MATERIALS
MINERALS
MIXTURES
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM RESIDUES
PYROLYSIS
SILICATE MINERALS
SYNTHESIS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
ZEOLITES