Process and catalysts for upgrading of hydrocarbons boiling in the naphtha range
AssigneesEnitecnologie S.p.A., Repsol Petroleo S.A., Elf Antar France, Agip Petroli S.p.A.
InventorsLaura Zanibelli, Virginio Arrigoni, Fernando Albertos, Evangelina Atanes, Thierry Cholley, Febronio Panarello
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Abstract
The present invention relates to the use of a catalytic system comprising a metal of group VIII, a metal of group VI, a metal oxide as carrier and suitable quantities of a component selected from a zeolite of the FER type, phosphorous, and a mixture thereof, in upgrading of hydrocarbons boiling in the naphtha range containing sulfur impurities, namely in hydrodesulfurization with contemporaneous skeleton isomerization of olefins contained in said hydrocarbons and/or with reduction of olefins hydrogenation, carried out in a single step.
Claims37
A process for desulfurizing hydrocarbons which boil within the range of 35 to 250° C., containing olefins and more than 150 ppm of sulfur, comprising contacting the hydrocarbons with a catalyst in the presence of hydrogen, wherein the catalyst comprises a metal of group VIII, a metal of group VI, a metal oxide as a carrier and a component A selected from the group consisting of:
- a) an FER zeolite in a quantity ranging from 5 to 30% by weight with respect to the total weight of the catalyst,
- b) phosphorous in a quantity ranging from 0.1 to 10% weight with respect to the total weight of the catalyst, and
- c) mixtures thereof,
- where when the component A is only phosphorous the catalyst is obtained by one of the following processes:
- (1) impregnating the metal oxide carrier with an aqueous solution of H3PO4 followed by impregnating an aqueous solution of the metal of group VIII and an aqueous solution of the metal of group VI,
- (2) drying and calcination of a gel obtained mixing an alcohol dispersion containing a soluble salt of the metal of group VIII and an organic source of aluminum with an aqueous solution containing a soluble salt of the metal of group VI and H3PO4,
- (3) impregnating with an aqueous solution of H3PO4 of a gel, dried and calcined, obtained mixing an alcohol dispersion containing a soluble salt of the metal of group VIII and an organic source of aluminum with an aqueous solution containing a soluble salt of the metal of group VI.
Dependencies are inferred from the claim text.