Selective isoparaffin synthesis from naphtha

Patent · Tue Aug 10 04:00:00 EDT 1993

OSTI ID:6230895

Bogdan, P L; Lawson, R J; Sachtler, J W.A.

A process combination is described for selectively upgrading a naphtha feedstock to obtain lower-boiling hydrocarbons having an increased content of branched-chain paraffins comprising the steps of: (a) contacting the naphtha feedstock in a hydrogenation zone with a hydrogenation catalyst comprising a platinum-group metal component and a refractory inorganic oxide in the presence of hydrogen at a pressure of from about 10 to 100 atmospheres, a temperature of at least 30 C, and a liquid hourly space velocity of from about 1 to 8 to produce a saturated intermediate; (b) contacting the saturated intermediate without heating in a selective-isoparaffin-synthesis zone at a pressure of from about 10 to 100 atmospheres, a temperature of between about 50 and 350 C, and a liquid hourly space velocity of between about 0.5 and 20 with a solid acid selective isoparaffin-synthesis catalyst comprising a combination of a platinum-group metal component on a chlorided inorganic-oxide support with a Friedel-Crafts metal halide in the presence of hydrogen, recovering synthesis product containing butanes and pentanes, and separating the synthesis product to obtain an isobutane concentrate, a light synthesis product comprising pentanes and a heavy synthesis product comprising C[sub 7] and C[sub 8] hydrocarbons; (c) dehydrogenating at least a portion of the isobutane concentrate in a dehydrogenation zone at dehydrogenation conditions using a dehydrogenation catalyst and recovering an isobutene-containing stream; (d) contacting at least a portion of the isobutene-containing stream with an alcohol in an etherification zone at etherification conditions to obtain an ether and a hydrocarbon raffinate; (e) contacting the heavy synthesis product in a reforming zone at reforming conditions using a reforming catalyst to obtain a reformate; and, (f) blending a gasoline component comprising at least a portion of each of the light synthesis product, ether and reformate.

• Assignee: UOP, Des Plaines, IL (United States)
• Patent Number(s): US 5235120; A
• Application Number: PPN: US 7-796562
• OSTI ID: 6230895
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALKENES
BOILING POINTS
BUTANE
BUTENES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DISTILLATES
ELEMENTS
ENERGY SOURCES
ETHERS
FOSSIL FUELS
FUELS
GASOLINE
HIGH PRESSURE
HYDROCARBONS
HYDROGEN
HYDROGENATION
ISOMERS
LIQUID FUELS
MEDIUM PRESSURE
MOLECULAR WEIGHT
NAPHTHA
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PENTANE
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM RESIDUES
PHYSICAL PROPERTIES
PROCESSING
REACTION INTERMEDIATES
REFINING
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE