Kiwi-Minsker, L.Porchet, S.Moeckli, P.Doepper, R.Renken, A.2006-04-182006-04-182006-04-181996https://infoscience.epfl.ch/handle/20.500.14299/229420A symposium report on the gas-phase methylation of catechol by methanol on g -Al2O3 modified by the basic elements: K, Li, Mg and Ca. Addn. of 7.5 at % Mg to g-Al2O3 was optimal and increased the 3-Me catechol selectivity from 0.26 to 0.65. X-ray diffraction expts. showed the diffusion of Li+ and Mg2+ cations into the g -Al2O3 bulk. This induces a change in the surface species and the surface acid-base properties. Ca2+ and K+ addn. to g-alumina was ineffective due to formation of basic oxide layers on the surface. [on SciFinder (R)]Regiochemistry (regioselective methylation of catechol by methanol in presence of metal-modified alumina)MethylationMethylation catalysts (selective methylation of catechol by methanol in presence of metal-modified alumina)methylation catechol methanol catalyst symposiumalumina metal methylation catalyst symposiumpotassium alumina methylation catalyst symposiumlithium alumina methylation catalyst symposiummagnesium alumina methylation catalyst symposiumcalcium atext::book/monograph::book part or chapter