Gas-phase hydrogenation of 4-tert-butylphenol over Pt/SiO2

Autor:	José R. Hernández Carucci, Ahmad Kalantar, Henrik Backman, Tapio Salmi, Dmitry Yu. Murzin
Rok vydání:	2004
Předmět:	Hydrogen chemistry.chemical_element Heterogeneous catalysis Photochemistry Medicinal chemistry Catalysis chemistry.chemical_compound chemistry Hydrogenolysis Epimer Phenols Physical and Theoretical Chemistry Platinum Cis–trans isomerism
Zdroj:	Journal of Catalysis. 227:60-67
ISSN:	0021-9517
DOI:	10.1016/j.jcat.2004.06.027
Popis:	Gas-phase hydrogenation of 4- tert -butylphenol (4-TBP) over 1% Pt/SiO 2 to cis and trans 4- tert -butylcyclohexanol (4-TBCHOL), via the intermediate 4- tert -butylcyclohexanone, was studied in a differential reactor at atmospheric pressure and at temperatures between 127 and 227 °C. The formation of by-products due to hydrogenolysis played an important role in the reaction at temperatures over 200 °C. The rates of 4- t -butylcyclohexanol and 4- t -butylcyclohexanone formation passed through a maximum at 187 °C. The catalyst deactivation was also considerable. Being thermodynamically more stable the trans form of the alcohols isomers is produced in separate experiments by epimerization in the presence of hydrogen as an astoichiometric compound. The reaction network for the reaction is proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e9c3068ad0d9705191d82a906c522dd https://doi.org/10.1016/j.jcat.2004.06.027 Zobrazit plný text záznamu Full Text from ScienceDirect