Process for selectively hydrogenating a hydrocarbon cut containi

Details Process for selectively hydrogenating a hydrocarbon cut containi Process for selectively hydrogenating a hydrocarbon cut containi

1979-04-04

1980-10-28

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

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

Hydrocarbon is contaminant in desired hydrocarbon

585265, 585850, 585852, 252466PT, C07C 508, C07C 700

Patent

active

042308976

ABSTRACT:
Process for selectively hydrogenating acetylenic hydrocarbons such as vinylacetylene contained in an unsaturated hydrocarbon fraction such as a C.sub.4 fraction also containing a diolefinic hydrocarbon such as butadiene, without substantially hydrogenating said diolefinic hydrocarbon, comprising the step of contacting said fraction, at least partially in the liquid phase, in the presence of hydrogen, with a catalyst of palladium on alumina whose palladium crystallites have an average size of at least 50 Angstroms, said step being optionally followed with a step of contacting the resultant fraction from the preceding step, in the presence of hydrogen, with a catalyst of palladium an alumina whose palladium crystallites have an average size of at most 45 Angstroms.

REFERENCES:
patent: 3116342 (1963-12-01), Robinson et al.
patent: 3898298 (1975-08-01), Desiderio et al.
patent: 3969267 (1976-07-01), McVicker
patent: 4093643 (1978-06-01), Vannice et al.

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