Two stage system for catalytic conversion of olefins with distil

Details Two stage system for catalytic conversion of olefins with distil Two stage system for catalytic conversion of olefins with distil

1983-04-04

1984-02-21

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

Same catalyst, solvent, or component thereof used in both...

585315, 585322, 585329, 585412, 585415, 585469, 585733, C07C 300, C07C 303, C07C 310, C07C 362

Patent

active

044331851

ABSTRACT:
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.

REFERENCES:
patent: 3760024 (1973-09-01), Cattanach
patent: 3827968 (1973-01-01), Givens et al.
patent: 4211640 (1980-07-01), Garwood et al.
patent: 4227992 (1980-10-01), Garwood et al.

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