Isomerization with an EUO-type catalyst of aromatic compounds with eight carbon atoms followed by a dehydrogenation stage
AssigneeInstitut Francais du Petrole
InventorsJean-Fran.cedilla.ois Joly, Vincent Coupard, Julia Magne-Drisch, Fabio Alario, Elisabeth Merlen, Sylvie Lacombe, Eric Benazzi
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Abstract
A C.sub.8 aromatic feedstock is isomerized by an isomerization stage conducted at 320-380.degree. C. with a catalyst containing at least one EUO-structure-type zeolite and at least one metal of group VIII, to obtain an effluent containing isomerized alkyl aromatics and about 10-30% by weight of naphthenes. The effluent is then subjected to a dehydrogenation stage so as to convert the naphthenes to additional alkyl aromatics.
Claims20
A process for isomerization of a feedstock that contains aromatic compounds with eight carbon atoms comprising subjecting the feedstock in the vapor phase to at least one isomerization stage a) conducted at 320-380.degree. C. in the presence of a catalyst containing at least one zeolite having and EUO structure at least partially in acid form and at least one metal of group VIII, to obtain an effluent containing isomerized alkyl aromatic compounds and 10-30% by weight of naphthenes based on the total weight of the effluent, and subjecting said effluent to at least one catalytic dehydrogenation stage b), to convert said naphthenes substantially to aromatic compounds.
Dependencies are inferred from the claim text.