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AssigneeInstitut Francais du Petrole
InventorsPhilippe Courty, Georgy L. Rabinovich, Victor N. Mojaiko, Jean-Francois LePage
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Catalyst for dealkylating, in the presence of steam, a hydrocarbon charge, obtained for example from a catalytic reforming unit or from a unit for the production of aromatic hydrocarbons, and containing at least one alkylaromatic hydrocarbon such as toluene or a xylene, said catalyst containing an alumina carrier of a specific surface higher than 50 m.sup.2 /g and, by weight with respect to the catalyst, from 0.1 to 2% of rhodium, from 0.05 to 2% of at least one metal selected from copper, silver and gold, from 0.05 to 2% of rhenium and from 0.02 to 5% of at least one additional metal selected from lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium and uranium.
In a process for dealkylating, in the presence of steam, at least one alkyl aromatic hydrocarbon, the improvement which comprises conducting the process in the presence of a catalyst containing (a) an alumina carrier and, by weight with respect to the catalyst, (b) from 0.1 to 2% of rhodium, (c) from 0.05 to 2% of at least one metal from group I B of the periodic classification of elements, selected from copper, silver and gold, (d) from 0.05 to 2% of rhenium and (e) from 0.02 to 5% of at least one additional metal selected from lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium and uranium.
Dependencies are inferred from the claim text.