Selective C-and O-Methylation of Catechol in Gas Phase over Modified y-Aluminas Full article
Source | Science and Technology in Catalysis 1998 : Proceedings of the Third Tokyo Conference on Advanced Catalytic Science and Technology,19-24 July 1998, Tokyo Compilation, 1999. 492 c. ISBN 978-0-444-50218-6. |
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Journal |
Studies in Surface Science and Catalysis
ISSN: 0167-2991 |
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Output data | Year: 1999, Volume: 121, Pages: 159-164 Pages count : 6 DOI: 10.1016/S0167-2991(99)80060-3 | ||||
Authors |
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Affiliations |
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Funding (1)
1 | Swiss National Science Foundation |
Abstract:
Gas phase methylation of catechol by methanol over modified y-alumina catalysts is studied experimentally. The catalyst composition and the reaction conditions are optimized to attain the highest selectivity towards 3-methylcatechol (C-methylation) or guaiacol (O-methylation and to diminish the catalyst deactivation. The modified y-alumina Li+ 3 % Mg2+ 5 %/γ-Al2O3 was found to be the best with respect to the 3-methylcatechol formation. At 35O°C and at a conversion level of 28% the selectivity of 92% towards 3-methylcatehcol was reached. The deactivation was observed to be lower if compared to pure y-alumina. Selectivity towards guaiacol formation increased with surface acidity and reached 89% over phosphated γ-alumina at 270γC. The catalyst structure was determined with a high confidence factor via “full-profile X-ray analysis”. The experimental data relating to activity/selectivity as well as catalyst stability to coke formation were explained from the model found for the catalyst structure.
Cite:
Kiwi-Minsker L.
, Jenzer G.
, Pliasova L.
, Renken A.
Selective C-and O-Methylation of Catechol in Gas Phase over Modified y-Aluminas
In compilation Science and Technology in Catalysis 1998 : Proceedings of the Third Tokyo Conference on Advanced Catalytic Science and Technology,19-24 July 1998, Tokyo. 1999. – C.159-164. – ISBN 978-0-444-50218-6. DOI: 10.1016/S0167-2991(99)80060-3 WOS Scopus РИНЦ
Selective C-and O-Methylation of Catechol in Gas Phase over Modified y-Aluminas
In compilation Science and Technology in Catalysis 1998 : Proceedings of the Third Tokyo Conference on Advanced Catalytic Science and Technology,19-24 July 1998, Tokyo. 1999. – C.159-164. – ISBN 978-0-444-50218-6. DOI: 10.1016/S0167-2991(99)80060-3 WOS Scopus РИНЦ
Dates:
Published print: | Jan 1, 1999 |
Published online: | Sep 2, 2007 |
Identifiers:
Web of science | WOS:000081933100022 |
Scopus | 2-s2.0-0009598308 |
Elibrary | 13307949 |
Chemical Abstracts | 1999:630687 |
Chemical Abstracts (print) | 132:224053 |
OpenAlex | W1531360413 |