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AssigneeCompagnie Francaise de Raffinage
InventorsPhilippe Engelhard, Michel Legendre
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Isomerization catalysts for hydrocarbons, and particularly for normal paraffins and/or naphthenes, formed of the following: At least one platinum-group metal, preferably platinum; At least one element selected from the group consisting of rare earth metals and yttrium; and At least one metal halide, for example aluminum trichloride, A carrier for the foregoing metals and halide which is formed in whole or in part of at least one refractory mineral oxide, such as alumina, and additionally a halogen in combined form, preferably chlorine. Also a process for the preparation of the foregoing catalysts involving at least one impregnation of the carrier with at least one solution containing at least one of the elements yttrium, rare earth metals, and platinum-group metals; at least one of the impregnating solutions including ions of the foregoing elements except the platinum-group metals; and an aftertreatment by known means with at least metal halide, preferably selected from the group consisting of aluminum trichloride, aluminum tribromide, ferric chloride, ferric bromide, beryllium dichloride, and zinc dichloride. Further modifications of said process including acidification with hydrochloric acid, calcination of the deposited metals, adjustment of the halogen content, and elimination of excess metal halide not fixed on the catalyst. Finally the use of the foregoing catalysts in the isomerization of hydrocarbons.
A catalyst for the isomerization of hydrocarbons comprising:
A catalyst for the isomerization of hydrocarbons comprising:
A process for preparation of a catalyst for the isomerization of hydrocarbons said catalyst comprising:
Dependencies are inferred from the claim text.