A highly ortho-selective TiO2 catalyst for the methylation of phenol

Autor:	Julio B. Fernandes, Aditi R. Gandhe
Rok vydání:	2004
Předmět:	Chemistry Thermal desorption spectroscopy Process Chemistry and Technology Inorganic chemistry General Chemistry Cresol Alkylation Catalysis chemistry.chemical_compound Rutile medicine Phenol Methanol Selectivity medicine.drug
Zdroj:	Catalysis Communications. 5:89-94
ISSN:	1566-7367
DOI:	10.1016/j.catcom.2003.11.017
Popis:	The investigation describes alkylation of phenol with methanol over an active rutile TiO 2 catalyst in relation to a commercial rutile form. The catalysts were characterized by XRD, surface areas and temperature programmed desorption studies with NH 3 and CO 2 as probe molecules. Alkylation reactions were carried out in the temperature range 250–480 °C to investigate the conditions that would favour the formation of ortho products viz. o -cresol and 2,6-xylenol. The synthesized rutile sample was more active than the commercial sample under identical conditions of temperature, WHSV and molar ratio of reactants. It showed 100% ortho selectivity at 480 °C. In comparison the commercial rutile gave mixed selectivity. The selectivity profiles of the catalysts are explained on the basis of their acid–base characteristics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17637f0bbaeadc6d03169a12b8af3108 https://doi.org/10.1016/j.catcom.2003.11.017 Zobrazit plný text záznamu Full Text from ScienceDirect