Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By dehydrogenation
Patent
1988-07-01
1990-02-20
Caldarola, Glenn
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By dehydrogenation
585660, C07C 536
Patent
active
049028480
ABSTRACT:
A process for the dehydrogenation of a dehydrogenatable hydrocarbon feedstock having small quantities of higher boiling range hydrocarbons which comprises: (a) introducing the dehydrogenatable hydrocarbon feedstock into a fractionation zone having at least a portion of reflux to a fractionation column supplied by the dehydrogenatable hydrocarbon feedstock to provide a dehydrogenatable hydrocarbon stream having a reduced concentration of higher boiling range hydrocarbons and a stream comprising the higher boiling range hydrocarbons; (b) introducing the dehydrogenatable hydrocarbon stream having a reduced concentration of higher boiling range hydrocarbon recovered in step (a) into a dehydrogenation zone containing dehydrogenation catalyst and operated at dehydrogenation conditions to provide a hydrocarbon stream comprising dehydrogenated hydrocarbons and unconverted dehydrogenatable hydrocarbons; (c) separating the hydrocarbon stream comprising dehydrogenated hydrocarbons and unconverted dehydrogenatable hydrocarbons from step (b) to provide a product stream comprising dehydrogenated hydrocarbons and a recycle stream comprising unconverted dehydrogenatable hydrocarbons; and (d) introducing the recycle stream comprising unconverted dehydrogenatable hydrocarbons recovered in step (c) into the fractionation column to provide at least a portion of feed to the fractionation column.
REFERENCES:
patent: 3691246 (1972-09-01), Parker et al.
patent: 4381418 (1983-04-01), Gewartowski et al.
patent: 4430517 (1984-02-01), Imai et al.
patent: 4469811 (1984-09-01), Lucien
patent: 4486547 (1984-12-01), Imai et al.
Vora, B. V., and Imai, T., "C.sub.2 /C.sub.5 Dehydrogenation Updated", Hydrocarbon Processing, Apr. 1982, pp. 171-174.
Scott Norman H.
Vora Bipin V.
Caldarola Glenn
Cutts, Jr. John G.
McBride Thomas K.
Tolomei John G.
UOP
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