Reforming method using a catalyst containing alkali metals...

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 35/09 (2006.01) B01J 21/04 (2006.01) B01J 23/56 (2006.01) B01J 23/58 (2006.01) B01J 23/656 (2006.01) C10G 35/085 (2006.01) B01J 23/62 (2006.01) B01J 23/644 (2006.01) B01J 23/652 (2006.01) B01J 27/13 (2006.01)

Patent

CA 2225501

A method for converting hydrocarbons into aromatic compounds, and particularly for catalytically reforming petrols and producing aromatic compounds from paraffinic and naphthenic hydrocarbons, wherein the feedstock to be processed is contacted with a catalyst which includes a matrix consisting of 0-100 wt.% transition alumina ?, the balance to 100 wt.% of the matrix being transition alumina .gamma., and at least one doping metal selected from the group which consists of alkali metals and alkaline-earth metals, at least one halogen selected from the group which consists of fluorine, chlorine, bromine and iodine, at least one noble metal from the platinum family, and at least one promoter metal selected from the group which consists of tin, germanium, indium, gallium, thallium, antimony, lead, rhenium, manganese, chromium, molybdenum and tungsten, said catalyst being subjected to additional hydrothermal processing at 300-1000 ·C in a gaseous atmosphere containing steam.

L'invention concerne un procédé de transformation d'hydrocarbures en composés aromatiques, en particulier de reformage catalytique des essences et de production de composés aromatiques à partir d'hydrocarbures paraffiniques et naphténiques, procédé dans lequel la charge à traiter est soumise à l'action d'un catalyseur. Ce catalyseur comprend une matrice constituée de 0 à 100 % en poids d'alumine de transition , ce complément à 100 % en poids de la matrice étant l'alumine de transition .gamma. et: au moins un métal dopant choisi dans le groupe des métaux alcalins et alcalino-terreux, au moins un halogène choisi dans le groupe formé par le fluor, le chlore, le brome et l'iode, au moins un métal noble de la famille du platine, et au moins un métal promoteur choisi dans le groupe formé par l'étain, le germanium, l'indium, le gallium, le thallium, l'antimoine, le plomb, le rhénium, le manganèse, le chrome, le molybdène et le tungstène, ledit catalyseur ayant subi un traitement hydrothermique complémentaire à une température de 300 à 1000 ~C, dans une atmosphère gazeuse contenant de la vapeur d'eau.

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