Two stage system for catalytic conversion of olefins with distillate and gasoline modes

Patent · Tue Feb 21 04:00:00 EST 1984

OSTI ID:7038647

Tabak, S A

An improved process for converting an olefinic feedstock containing ethene and C/sub 3//sup +/ alkenes to produce a heavy hydrocarbon product rich in distillate by contacting the feedstock with an oligomerization catalyst bed, at elevated pressure and temperature conditions in operating mode favorable to formation of heavy distillate product by selective conversion of C/sub 3//sup +/ alkenes. The improvement comprises providing a distillate mode effluent stream containing substantially unconverted ethene in vapor phase and condensed distillate, and recovering unconverted ethene-rich hydrocarbon vapor from the distillate mode effluent stream and further converting such to olefinic gasoline in a second oligomerization catalyst bed at reduced moderate pressure and elevated temperature conditions in operating mode favorable to formation of C/sub 6//sup +/ olefinic gasoline. At least a portion of the olefinic gasoline is recycled for conversion with the feedstock in the distillate mode catalyst bed. Gasoline and distillate mode effluent streams may be fractionated to recover a light hydrocarbon stream rich in C/sub 3//sup +/ aliphatic hydrocarbons for recycling at least a portion of the light hydrocarbon stream to dilute the ethene-rich vapor in the second gasoline mode catalyst bed.

• Assignee: Mobil Oil Corp.
• Patent Number(s): US 4433185
• OSTI ID: 7038647
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
ALKANES
ALKENES
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
DISTILLATES
DISTILLATION
ENERGY SOURCES
ETHYLENE
EVAPORATION
FLASHING
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FRACTIONATION
FUELS
GASOLINE
HIGH TEMPERATURE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUEFIED GASES
LIQUEFIED PETROLEUM GASES
LIQUID FUELS
LIQUIDS
MATERIALS
MINERALS
MIXTURES
NATURAL GAS LIQUIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PARAFFIN
PENTENES
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
POLYMERIZATION
PROCESS CONTROL
PRODUCTION
PROPYLENE
SEPARATION EQUIPMENT
SEPARATION PROCESSES
WAXES
ZEOLITES