Multistage process for converting oxygenates to liquid hydrocarbons with aliphatic recycle

Patent · Mon Mar 31 23:00:00 EST 1986

OSTI ID:5985817

Gould, R M; Tabak, S A

A process is described for converting oxygenate feedstock comprising methanol, dimethyl ether or mixtures thereof to predominantly distillate range liquid hydrocarbons. The process consists of the steps of: contacting the feedstock with zeolite catalyst in a primary fluidized bed catalyst stage at elevated temperature and moderate pressure to convert feedstock to hydrocarbons comprising C/sub 2/-C/sub 4/ olefins and C/sub 5/+ hydrocarbons; cooling and separating effluent from the primary stage to recover a liquid hydrocarbon stream and a light hydrocarbon vapor stream rich in C/sub 2/-C/sub 4/ olefins; pressurizing and contacting the light olefinic hydrocarbon stream in a secondary catalytic stage with oligomerization catalyst comprising medium-pore shape selective acidic zeolite at substantially increased pressure and moderate temperature to convert at least a portion of olefins to a heavier liquid hydrocarbon product stream comprising olefinic gasoline and distillate range liquids; and injecting at least a portion of the olefinic gasoline recycle stream into the fluidized catalyst bed of the primary stage reactor at a separate point above the oxygenate feedstock.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4579999
• OSTI ID: 5985817
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALCOHOLS
ALKENES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
COOLING
CRACKING
DECOMPOSITION
DISPERSIONS
DISTILLATES
ETHERS
FLUIDIZED BEDS
FLUIDS
FUELS
GASES
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
METHANOL
METHYL ETHER
MINERALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLYMERIZATION
PRESSURE DEPENDENCE
PRESSURIZING
PYROLYSIS
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
VAPORS
YIELDS
ZEOLITES