Process for the hydrogenation of diolefins in aromatic-rich hydr

Details Process for the hydrogenation of diolefins in aromatic-rich hydr Process for the hydrogenation of diolefins in aromatic-rich hydr

1996-01-29

1998-10-13

Yildirim, Bekir L.

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

Hydrocarbon is contaminant in desired hydrocarbon

585258, 585259, 585260, 585273, 585277, C07C 7163, C07C 503, C07C 508

Patent

active

058213970

ABSTRACT:
A process is described for the high-efficiency selective hydrogenation of an aromatic hydrocarbon cut which also contains monoolefinic hydrocarbons and polyolefinic and/or acetylenic hydrocarbons with a bromine number of 10000 to 100 mg per 100 g of product with an aromatic degree of conversion which is limited to a maximum of 0.15% by weight, the process being characterized in that the cut, which is at least partially in the liquid phase, is passed with hydrogen into a hydrogenation zone in contact with a catalyst containing 0.1% to 1% by weight (with respect to the support) of palladium, the catalyst having been treated before activation with at least one organic sulphur-containing compound to introduce 0.05% to 1% of sulphur (by weight with respect to the weight of the catalyst), the process being carried out at a temperature in the range 20.degree. C. to 25.degree. C., at a pressure of 4-50 bar, a GHSV of 0.2-25 h.sup.-1 and with a H.sub.2 /monoolefin +polyolefin and/or acetylenes ratio in the range 0.3 to 100.

REFERENCES:
patent: 3715404 (1973-02-01), Lindlar et al.
patent: 4145276 (1979-03-01), Cosyns et al.
patent: 4172027 (1979-10-01), Ham et al.

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