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Kinetics of 4‐ tert ‐butylphenol hydrogenation over rhodium
Author(s) -
Konuspaev Sapar R.,
Zhanbekov Khairulla N.,
Kul'Kova Natalya V.,
Murzin Dmitry Yu.
Publication year - 1997
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270200212
Subject(s) - kinetics , rhodium , chemistry , tautomer , stereoselectivity , catalysis , enol , medicinal chemistry , organic chemistry , physics , quantum mechanics
The kinetics of the liquid phase hydrogenation of 4‐ tert ‐butylphenol to form cis ‐ and trans ‐ 4‐ tert ‐butylcyclohexanol at 1.0–10.0 MPa and 40°C in isopropanol over a Rh catalyst has been studied. The kinetic behavior of this parallel system is described by a proposed reaction network. Keto‐enol tautomeric transformation of adsorbed 4‐ tert ‐butyltetrahydrophenol and 4‐ tert ‐butylcyclohexanone is thought to be a key step, which governs the stereoselectivity of the overall complex reaction of alkylphenol hydrogenation.