Olefin fractionation and catalytic conversion system

Patent · Tue Mar 12 04:00:00 EST 1985

OSTI ID:5515882

Hsia, Ch -H; Owen, H; Wright, B S

An improved catalytic process for converting an olefinic feedstock comprising ethylene and C/sub 3/+ olefins to heavier liquid hydrocarbon product comprising the steps of: (a) prefractionating the olefinic feedstock to obtain a gaseous stream rich in ethylene and a liquid stream containing C/sub 3/+ olefin; (b) vaporizing and contacting the liquid stream from the prefractionating step with hydrocarbon conversion oligomerization catalyst in at least one exothermic catalytic reaction zone at elevated temperature and pressure to provide a heavier hydrocarbon effluent stream comprising heavy, intermediate and light hydrocarbons; (c) flashing the effluent stream between the reaction zone and a first phase separation zone by reducing pressure of the effluent stream, thereby producing a first liquid effluent fraction rich in heavy hydrocarbons and a first effluent vapor stream containing intermediate and light hydrocarbons; (d) condensing a portion of the first effluent vapor stream in a second phase separation zone to produce a second liquid effluent stream rich in intermediate boiling range hydrocarbons and a second vapor stream rich in light hydrocarbons; (e) recycling at least a portion of the second liquid effluent stream as a liquid sorbent stream to prefractionating step (a); (f) further reacting the recycled gasoline together with sorbed C/sub 3/+ olefin in the catalytic reactor system of step (b).

• Assignee: Mobil Oil Corp.
• Patent Number(s): US 4504691
• OSTI ID: 5515882
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISTILLATES
ENERGY SOURCES
EVAPORATION
FLUIDS
FOSSIL FUELS
FRACTIONATION
FUELS
GASOLINE
HYDROCARBONS
LIQUEFIED GASES
LIQUEFIED PETROLEUM GASES
LIQUID FUELS
LIQUIDS
NATURAL GAS LIQUIDS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
PRODUCTION
PYROLYSIS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
VAPOR CONDENSATION