Integrated process for converting oxygenates to liquid hydrocarbons

Patent · Tue Dec 09 00:00:00 EST 1986

OSTI ID:6928288

Owen, H; Tabak, S A; Wright, B S

An integrated continuous process is described for converting oxygenated organic feedstock to liquid hydrocarbons comprising the steps of (a) contacting feedstock with zeolite catalyst in a primary catalyst stage at elevated temperature to convert at least a portion of the feedstock oxygenate predominantly to an olefinic fraction rich in C/sub 2/-C/sub 4/ olefins and a minor heavy hydrocarbon portion containing C/sub 5/+ aliphatic and aromatic hydrocarbons; (b) cooling and separating effluent from step (a) to provide an aqueous liquid byproduct stream, a heavy hydrocarbon liquid stream and a light hydrocarbon stream rich in C/sub 2/-C/sub 4/ olefins; (c) compressing and contacting the light hydrocarbon stream in a sorption tower with a liquid hydrocarbon sorbent stream containing a major amount of the heavy liquid stream from step (b) to selectively sorb C/sub 3/+ components in a liquid sorbate stream; (d) fractionating the sorbate stream to provide a gasoline-rich stream and a light hydrocarbon stream rich in C/sub 3/-C/sub 4/ olefins; (e) further reacting the olefinic light hydrocarbon stream from step (d) with isoparaffin in a secondary alkylation stage in the presence of liquid phase acid catalyst to convert at least a portion of C/sub 3/-C/sub 4/ olefins to a heavier C/sub 7/+ liquid hydrocarbon product stream comprising alkylate gasoline; (f) recycling ethene in a gaseous stream from the sorption tower to the primary catalytic stage for further conversion; and (g) recycling a portion of gasoline from step (d) to step (c) for use as lean sorbent.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4628135
• OSTI ID: 6928288
• Resource Relation: Patent File Date: Filed date 23 Sep 1985
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
ALKENES
CHEMICAL PREPARATION
GASOLINE
ALKYLATION
AQUEOUS SOLUTIONS
CATALYSTS
COMPRESSION
COOLING
FRACTIONATION
GAS FLOW
OXYGEN
PARAFFIN
RECYCLING
SORPTION
TEMPERATURE DEPENDENCE
ZEOLITES
ALKANES
CHEMICAL REACTIONS
DISPERSIONS
ELEMENTS
FLUID FLOW
FUELS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
SEPARATION PROCESSES
SOLUTIONS
SYNTHESIS
WAXES
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)