Process for the selective hydrogenation of a hydrocarbon fraction with 2 or 3 carbon atoms per molecule
AssigneeInstitut Francais du Petrole
InventorsJean Cosyns, Daniel Durand, Gerard Leger
Life of this patent
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Abstract
A C.sub.2 or C.sub.3 hydrocarbon fraction comprising at least one mono-olefinic hydrocarbon and at least one acetylenic hydrocarbon, and optionally at least one diolefinic hydrocarbon, is hydrogenated selectively in contact with a palladium-on-alumina catalyst subjected to calcining at a relatively high temperature and whose palladium crystallites have an average size of at least 50 Angstroms.
Claims9
A process for selectively hydrogenating a C.sub.2 and/or C.sub.3 hydrocarbon fraction comprising at least one mono-olefinic hydrocarbon, at least one acetylenic hydrocarbon, and at least one diolefinic hydrocarbon, to selectively hydrogenate the acetylenic hydrocarbon and the diolefinic hydrocarbon, without substantial hydrogenation of the mono-olefinic hydrocarbon, comprising contacting said hydrocarbon fraction and hydrogen with a catalyst of palladium-on-alumina, with the average size of the palladium crystallites in said catalyst being at least 50 Angstroms.
A process for selectively hydrogenating a C.sub.3 hydrocarbon fraction containing simultaneously at least 80% by weight of propylene, 1 to 5% by weight of propyne, and 0.5 to 5% by weight of propadiene, to selectively hydrogenate the propyne and propadiene without substantial hydrogenation of the propylene, the process comprising contacting said hydrocarbon fraction and hydrogen with a catalyst of palladium on alumina, with the average size of the palladium crystallites in said catalyst being at least 50 Angstroms.
Dependencies are inferred from the claim text.