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Heterogeneous catalytic methylation of catechol

✍ Scribed by Dipl.-Ing. Stéphane Porchet; Dr. Shoujin Su; Dr. Ralf Doepper; Dr. Albert Renken

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
332 KB
Volume
17
Category
Article
ISSN
0930-7516

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✦ Synopsis

Abstract

It has been shown that, after a partial deactivation, γ‐alumina (γ‐Al~2~O~3~) is a good catalyst for selective methylation of 1,2‐benzenediol in the temperature range of 260–310°C. The main products are the desired 3‐methyl‐1,2‐benzenediol and 2‐methoxyphenol, which may be converted in another step into 3‐methyl‐1,2‐benzenediol, giving an overall selectivity for the desired products of 80 to 90%. The catechol forms a strongly chemisorbed surface species on γ‐alumina and its steric adsorption model correlates with the kinetic data.

📜 SIMILAR VOLUMES

Catalyst development for the selective m
Catalyst development for the selective methylation of catechol
✍ S. Porchet; L. Kiwi-Minsker; R. Doepper; A. Renken 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 322 KB

Gas-phase alkylation of catechol with methanol on T-alumina and modified "t-alumina catalysts is studied experimentally. By limiting the conversion to X < 0.3, the formation of polymethylated species can be avoided and only the three isomers guaiacol, 3-methylcatechol and 4-methylcatechol are observ