Process for converting oxygenates to alkylated liquid hydrocarbons

Patent · Tue Dec 30 00:00:00 EST 1986

OSTI ID:6953699

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 C/sub 2/-C/sub 4/ olefins and a minor fraction containing C/sub 5//sup +/ 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 vapor stream rich in C/sub 2/-C/sub 4/ olefins; (c) compressing at least a portion of the olefinic light hydrocarbon stream to condense a C/sub 3//sup +/ liquid olefinic hydrocarbon stream rich in C/sub 3/-C/sub 4/ olefins and recovering an ethene-rich gaseous stream; (d) contacting the light hydrocarbon vapor stream from step (c) with a liquid hydrocarbon sorbent stream in a sorption tower under conditions to selectively sorb the major amount of C/sub 3//sup +/ hydrocarbon components from the light vapor stream to provide a C/sub 3//sup +/ sorbate stream rich in C/sub 3/-C/sub 4/ olefins; (e) fractionating C/sub 3//sup +/ sorbate to provide C/sub 5//sup +/ gasoline and C/sub 3/-C/sub 4/ olefin stream; (f) further reacting the C/sub 3/-C/sub 4/ olefin stream from step (e) with isoparaffin in a secondary alkylation stage with liquid phase acid catalyst to convert at least a portion of C/sub 3/-C/sub 4/ olefins to a heavier C/sub 7//sup +/ liquid hydrocarbon product stream comprising alkylate gasoline; (g) recycling ethene for further catalytic conversion in the primary catalytic stage; and (h) recycling a portion of alkylate gasoline to step (d) for use as lean sorbent.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4633028
• OSTI ID: 6953699
• Resource Relation: Patent File Date: Filed date 23 Sep 1985
• Country of Publication: United States
• Language: English

Related Subjects

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