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US 4,123,470 AGranted
Biaryl production
AssigneePhillips Petroleum Company
InventorTimothy P. Murtha
Life of this patent
Estimating the term…
Abstract
Aromatic hydrocarbons are converted to biaryl compounds in a two-step process comprising hydroalkylation of the aromatic hydrocarbons to cycloalkyl aromatic hydrocarbons followed by dehydrogenation in the presence of a metal dehydrogenation catalyst and an acidic support to convert the cycloalkyl aromatic hydrocarbons to biaryl compounds. In one embodiment, benzene is hydroalkylated to cyclohexylbenzene, and the cyclohexylbenzene then dehydrogenated to biphenyl.
Claims8
A process for the production of biaryl compounds from monocyclic aromatic hydrocarbons which comprises:
- (a) contacting at least one monocyclic aromatic hydrocarbon with hydrogen in the presence of a hydroalkylation catalyst and under hydroalkylation conditions which produce cycloalkyl aromatic hydrocarbons, and
- (b) treating said cycloalkyl aromatic hydrocarbons produced in (a) with hydrogen in the presence of a metal dehydrogenation catalyst on an acidic support and under dehydrogenation conditions which produce biaryl compounds substantially free of by-product triaryls and higher ring assemblies.
Dependencies are inferred from the claim text.