Process for converting methanol to alkyl ethers, gasoline, distillate and alkylate liquid hydrocarbons

Patent · Tue Aug 04 00:00:00 EDT 1987

OSTI ID:6213992

Avidan, A A; Krambeck, F K; Tabak, S A

A process is described for converting oxygenate feedstock comprising methanol to liquid hydrocarbons comprising the steps of (a) contacting the feedstock with zeolite catalyst in a primary catalyst stage at elevated temperature and moderate pressure to convert feedstock to hydrocarbons comprising C/sub 2/-C/sub 5/ olefins and C/sub 6/+ liquid hydrocarbons; (b) cooling and separating the primary stage effluent to recover a liquid C/sub 6/+ hydrocarbon stream and a light hydrocarbon stream rich in C/sub 2/-C/sub 5/ olefins including propylene and C/sub 4/-C/sub 5/ isoalkenes; (c) compressing at least a portion of the olefinic light hydrocarbon stream to condense a liquid olefinic hydrocarbon stream rich in C/sub 4/-C/sub 5/ isoalkenes and recovering a gaseous stream rich in ethene and propene; (d) reacting the isoalkenes with methanol in a secondary stage etherification zone by contacting the isoalkenes and methanol with an acid etherification catalyst to produce C/sub 5/-C/sub 6/ methyl isoalkylethers; (e) fractionating the secondary stage effluent to obtain a liquid either and C/sub 5/+ hydrocarbon stream and an olefinic C/sub 4/ stream rich in unreacted butenes and isobutane; (f) reacting the butene-rich olefinic stream from step (e) with isobutane in a catalytic alkylation stage in contact with acid alkylation catalyst to convert at least a portion of olefins to alkylate gasoline; (g) recovering a propene-rich stream from step (c) and reacting the propene-rich stream with excess isobutane in step (f); and (h) recycling ethene and/or propene in a gaseous stream to the primary catalytic stage.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4684757
• OSTI ID: 6213992
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
2-METHYLPROPANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
ALKANES
ALKENES
ALKYL RADICALS
BUTENES
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
COMPRESSION
COOLING
DISTILLATES
ELEMENTS
ENERGY SOURCES
ETHERS
FOSSIL FUELS
FRACTIONATION
FUELS
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
METHANOL
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PRESSURE DEPENDENCE
PROPYLENE
RADICALS
SEPARATION PROCESSES
SYNTHESIS
TEMPERATURE DEPENDENCE
ZEOLITES