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AssigneeInstitut Francais du Petrole
InventorsChristine Travers, Jean-Paul Bournonville, Jean-Pierre Franck
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A catalyst for isomerizing a hydrocarbon cut of high n-paraffin content is disclosed. The catalyst is obtained by controlled oxychlorination of a solid containing at least one group VIII metal supported on an acid mordenite, said mordenite having a sodium content lower than 0.2% by weight, adsorbing molecules of a kinetic diameter larger than about 6.6 Angstroms, having a mesh volume, V, of the elementary mesh from 2.73 to 2.78 nm.sup.3 and a benzene adsorption capacity higher than 5% by weight, said oxychlorination being conducted at a temperature of about 200.degree.-500.degree. C. by means of a gas mixture containing oxygen, water, chlorine or at least one chlorinated compound used in a total amount from 0.5 to 10% by weight of chlorine, in proportion to the mordenite weight. The catalyst may further contain a matrix, the mordenite amount being at least 40% by weight of the total amount of mordenite and matrix.
A mordenite and group VIII metal containing catalyst, obtained by a process consisting essentially of gas phase oxychlorination of a solid containing at least one group VIII metal of the periodic classification of elements, supported by a mordenite in acid form, said mordenite having a content of alkali metal and alkaline-earth metal cations, expressed in sodium weight equivalent, lower than 0.2% by weight with respect to the dry mordenite weight, adsorbing molecules of kinetic diameter higher than about 6.6 Angstroms, having a mesh volume V of the elementary mesh from 2.73 to 2.78 nm.sup.3 and a benzene adsorption capacity higher than 5% by weight, in proportion to the dry mordenite weight, said oxychlorination being conducted at a temperature from about 200 to 500.degree. C. by feeding of a gas mixture containing oxygen, 0.03-4% by weight of water, and chlorine and/or at least one chlorinated compound, the chlorine or chlorinated compound being fed amounting to a total of 0.5-10% by weight, calculated as chlorine weight in proportion to the mordenite weight.
A process for the production of a mordenite and group VIII metal catalyst, comprising oxychlorinating a solid containing at least one group VIII metal supported by an acid mordenite, said mordenite being in acid form and having a content of alkali metal and alkaline-earth metal cations, expressed in sodium weight equivalent, lower than 0.2% by weight with respect to the dry mordenite weight, wherein said oxychlorination is conducted at about 200.degree.-500.degree. C., with a gas mixture containing oxygen, 0.03-4% by weight of water, and chlorine and/or at least one chlorinated compound, the chlorine or chlorinated compound feed amounting to a total of 0.5-10% by weight, calculated as chlorine weight in proportion to the mordenite weight.
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