Multi-stage system for converting oxygenates to liquid hydrocarbons with aliphatic recycle
A continuous multi-stage catalytic system is described for converting oxygenated feedstock to liquid hydrocarbons comprising primary stage fluidized bed catalytic reactor means containing acidic zeolite catalyst for converting oxygenate to olefinic hydrocarbons rich in C/sub 2/-C/sub 4/ lower alkenes; means for charging feedstock at a bottom portion of the primary stage reactor means; secondary stage catalytic oligomerization reactor means containing medium pore shape selective acidic zeolite oligomerization catalyst for converting the lower alkenes from the primary stage to heavier liquid hydrocarbons; fractionation means for separating secondary stage effluent into a light hydrocarbon stream containing C/sub 2/-C/sub 4/ aliphatic hydrocarbons, a C/sub 5+/ gasoline stream and distillate range stream; means for recovering and recycling at least a portion of the C/sub 5+/ gasoline stream to the primary stage for conversion in the fluidized bed reactor by injecting the recycled gasoline stream into the fluidized bed reactor at a midpoint thereof, thereby preventing substantial reaction with oxygenate.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4689205
- OSTI ID:
- 5942973
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALKENES
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMICAL REACTORS
COOLING
DISTILLATES
ELEMENTS
ENERGY SOURCES
FLUIDIZED BEDS
FLUIDS
FOSSIL FUELS
FRACTIONATION
FUELS
GASES
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUEFIED GASES
LIQUEFIED PETROLEUM GASES
LIQUID FUELS
LIQUIDS
MATERIALS
MINERALS
NATURAL GAS LIQUIDS
NONMETALS
ORGANIC COMPOUNDS
OXYGEN
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
POLYMERIZATION
PRESSURE DEPENDENCE
PUMPS
RECYCLING
SEPARATION PROCESSES
SYNTHESIS
TEMPERATURE DEPENDENCE
VAPORS
ZEOLITES