Hydroalkylation of benzene and analogs
AssigneeThe Standard Oil Company
InventorsSerge R. Dolhyj, Louis J. Velenyi
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Abstract
Mononuclear aromatic hydrocarbons, e.g. benzene and analogs, are converted by hydroalkylation to the corresponding cycloalkyl aromatics by contacting the mononuclear aromatic hydrocarbons in the presence of hydrogen with a catalyst comprising a rare earth-exchanged Y-type zeolite support carrying a promoter comprising at least one of ruthenium, iridium, rhodium and palladium, the catalyst being calcined in an oxygen-containing atmosphere at a temperature of 250.degree. to 600.degree. C. prior to the hydroalkylation reaction.
Claims14
A process for the hydroalkylation of mononuclear aromatic hydrocarbons comprising contacting a mononuclear aromatic hydrocarbon and hydrogen with a catalyst comprising a rare earth-exchange Y-type zeolite support carrying a promoter comprising at least one of ruthenium, iridium, rhodium and palladium, said catalyst having been calcined in a molecular oxygen-containing atmosphere at a temperature of about 250.degree. to 600.degree. C. prior to use.
A process for the hydroalkylation of mononuclear aromatic hydrocarbons comprising contacting for a period of 10 minutes to 6 hours at a temperature of from room temperature to 400.degree. C. hydrogen and a mononuclear aromatic hydrocarbon selected from the group consisting of benzene and substituted benzene subsituted with 1 to 4 alkyl group each independently having 1 to 4 carbon atoms with a catalyst obtained by calcining in a molecular oxygen-containing atmosphere at a temperature of about 250.degree. to 600.degree. C. a composite comprising a rare earth-exchanged Y-type zeolite support and at least one compound containing a promoter comprising at least one of ruthenium, iridium, rhodium and palladium, the amount of said compound on said support being such that the amount of promoter on said support after calcination is between about 0.2 and 10 weight percent with the weight of said rare earth-exchanged Y-type zeolite plus the weight of said promoter being taken as 100%.
Dependencies are inferred from the claim text.