Naphtha upgrading process
A method is described for upgrading a paraffinic naphtha including major amounts of C/sub 5/ and C/sub 6/ components to produce gasoline boiling range products of improved octane number, which comprises (i) hydrocracking the naphtha over a hydrocracking catalyst comprising zeolite beta and a hydrogenation-dehydrogenation component under conditions of elevated temperature and pressure and in the presence of hydrogen and at a conversion of not more than 25 volume percent to C/sub 5-/ products. This is done to effect a partial, preferential hydrocracking of the paraffins of relatively longer chain length in the naphtha and a concurrent isomerization of n-paraffins, to form a hydrocracking effluent comprising isobutane and higher boiling materials; (ii) fractionating the hydrocracked effluent to form (i) an isobutane stream, (ii) a relatively low boiling stream having a boiling range of approximately C/sub 5/ to 200/sup 0/F. and comprising C/sub 5/ to C/sub 7/ iso-paraffins, and (iii) a relatively higher boiling stream having an initial boiling point of approximately 200/sup 0/F., and (iii) reforming the relatively high boiling point stream to form a gasoline boiling range product of improved octane rating.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4647368
- OSTI ID:
- 6758862
- Resource Relation:
- Patent File Date: Filed date 15 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GASOLINE
ANTIKNOCK RATINGS
CHEMICAL PREPARATION
NAPHTHA
HYDROCRACKING
2-METHYLPROPANE
ALKANES
BOILING POINTS
CATALYSTS
CATALYTIC EFFECTS
DEHYDROGENATION
FRACTIONATION
HYDROGEN
HYDROGENATION
ISOMERIZATION
MEDIUM TEMPERATURE
PRESSURE EFFECTS
TEMPERATURE EFFECTS
ZEOLITES
CHEMICAL REACTIONS
COAL TAR OILS
CRACKING
DECOMPOSITION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PYROLYSIS
SEPARATION PROCESSES
SYNTHESIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
020400* - Petroleum- Processing