Patent ID: 7906685

Claim:
A process for producing cyclohexylbenzene, the process comprising: (a) feeding benzene and hydrogen to at least one reaction zone; (b) contacting the benzene and hydrogen in the at least one reaction zone under hydroalkylation conditions with a catalyst system comprising a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom, and at least one hydrogenation metal to produce an effluent containing cyclohexylbenzene, wherein the ratio of the total number of moles of hydrogen fed to the at least one reaction zone to the number of moles of benzene fed to the at least one reaction zone is between 0.4 and 0.9:1.