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1. (WO2016064590) ACTIVATION OF DEHYDROGENATION CATALYSTS

Pub. No.:    WO/2016/064590    International Application No.:    PCT/US2015/054729
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Fri Oct 09 01:59:59 CEST 2015
IPC: B01J 23/42
B01J 23/14
B01J 32/00
C07C 2/66
C07C 13/28
Applicants: EXXONMOBIL CHEMICAL PATENTS INC.
Inventors: DAKKA, Jihad, M.
DECAUL, Lorenzo, C.
DE MARTIN, Gregory, J.
SALCICCIOLI, Michael
SANGAR, Neeraj
PAVLISH, Aaron, B.
KHEIR, Ali, A.
MOHR, Gary, D.
Title: ACTIVATION OF DEHYDROGENATION CATALYSTS
Abstract:
In a process for dehydrogenating cyclohexylbenzene and/or alkyl-substituted cyclohexylbenzene compounds, a dehydrogenation catalyst comprising at least one Group 10 metal compound on a support is heated in the presence of hydrogen from a first temperature from 0°C to 200°C to a second, higher temperature from 60°C to 500°C at a ramp rate no more than 100°C/hour. The dehydrogenation catalyst is contacted with hydrogen at the second temperature for a time from 3 to 300 hours to produce an activated dehydrogenation catalyst. A feed comprising cyclohexylbenzene and/or an alkyl-substituted cyclohexylbenzene compound is then contacted with hydrogen in the presence of the activated dehydrogenation catalyst under conditions effective to produce a dehydrogenation reaction product comprising biphenyl and/or an alkyl-substituted biphenyl compound.