Control system for multistage chemical upgrading
A continuous catalytic process is described for converting olefinic feedstock comprising ethylene and C/sub 3/+ olefins to heavier liquid hydrocarbon product comprising the steps of: prefractionating the olefinic feedstock to obtain a gaseous stream rich in ethylene and a first liquid olefinic stream comprising C/sub 3/-C/sub 4/ olefin; passing the C/sub 3/-C/sub 4/ liquid olefinic stream to a first accumulator vessel; contacting a major stream portion of the C/sub 3/-C/sub 4/ olefins from the accumulator vessel with shape selective medium pore zeolite oligomerization catalyst in a distillate mode catalytic reactor zone at elevated temperature and pressure to provide a heavier hydrocarbon effluent stream comprising distillate, gasoline and light hydrocarbons; fractionating the effluent stream to recover distillate, gasoline and a second C/sub 3/-C/sub 4/ hydrocarbon stream containing isobutane; and further reacting a stoichiometric excess of isobutane from the second C/sub 3/-C/sub 4/ hydrocarbon stream with a minor stream of C/sub 3/-C/sub 4/ olefin from the first accumulator vessel in an alkylation reactor zone in the presence of acid alkylation catalyst to produce an effluent stream containing C/sub 7/+ alkylate.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4658073
- OSTI ID:
- 6590388
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
2-METHYLPROPANE
ALKANES
ALKENES
ALKYLATION
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONTROL SYSTEMS
DISTILLATES
ENERGY SOURCES
ETHYLENE
FLOW RATE
FOSSIL FUELS
FRACTIONATION
FUELS
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
POLYMERIZATION
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SIGNALS
STOICHIOMETRY
SYNTHESIS
TEMPERATURE DEPENDENCE
VISCOSITY
ZEOLITES