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Multistage process for converting oxygenates to alkylated liquid hydrocarbons

Patent ·
OSTI ID:7147494
;

This patent describes an integrated continuous process 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 and moderate pressure to convert at least a portion of the feedstock oxygenate to hydrocarbons containing a major fraction of C/sub 2/-C/sub 4/ olefins and a minor fraction containing C/sub 5/+ 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 liquid olefinic hydrocarbon stream rich in C/sub 3/-C/sub 4/ olefins and recovering an ethene-rich gaseous stream; (d) further reacting the condensed liquid olefinic hydrocarbon stream from step (c) with isobutane in a secondary alkylation stage with 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; and (e) recycling ethene in a gaseous stream to the primary catalytic stage.

Assignee:
Mobil Oil Corp., New York, NY
Patent Number(s):
US 4628134
OSTI ID:
7147494
Country of Publication:
United States
Language:
English

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Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
2-METHYLPROPANE
ALKANES
ALKENES
ALKYLATION
AQUEOUS SOLUTIONS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COMPRESSION
COOLING
DISPERSIONS
ELEMENTS
FLUID FLOW
FLUIDS
FUELS
GASES
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FLOW
LIQUID FUELS
MATERIALS
MINERALS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
OXYGEN
PETROLEUM PRODUCTS
PRESSURE DEPENDENCE
RECYCLING
SOLUTIONS
SYNTHESIS
TEMPERATURE DEPENDENCE
VAPOR CONDENSATION
VAPORS
ZEOLITES