Process for hydrogenation of aromatics in hydrocarbon...

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 45/48 (2006.01)

Patent

CA 2494843

The present invention relates to an improved process for the hydrogenation of aromatics in hydrocarbon feedstocks containing thiopheneic compounds as impurities, the aromatics hydrogenation being conducted in a hydrogenation reactor in the presence of a nickel based catalyst. The improvement comprises operating the hydrogenation reactor at a reaction temperature sufficiently high from the start of a run, that the thiopheneic compounds are decomposed and substantially absorbed into the bulk of the nickel catalyst, thereby substantially extending the life of the catalyst.

L'invention concerne un procédé amélioré d'hydrogénation de composés aromatiques dans les charges d'hydrocarbures contenant des composés thiophéniques constituant des impuretés, cette hydrogénation des composés aromatiques étant effectuée dans un réacteur d'hydrogénation, en présence d'un catalyseur à base de nickel. L'amélioration réside en ce qu'on fait fonctionner le réacteur d'hydrogénation à une température de réaction suffisamment élevée dès le début d'un cycle pour que les composés thiophéniques soient décomposés et sensiblement absorbés dans la masse du catalyseur à base de nickel, ce qui permet d'allonger la durée de vie du catalyseur.

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