ORTHO-selective phenol methylation over iron-magnesium oxide catalysts
- 1 January 1996
- journal article
- Published by Springer Nature in Research on Chemical Intermediates
- Vol. 22 (1) , 53-60
- https://doi.org/10.1163/156856796x00377
Abstract
Alkylation of phenol to ORTHO-cresol and 2,6-xylenol with methanol in the presence of iron and iron-magnesium oxide catalysts was investigated. The catalysts displayed high activity and stability. Addition of magnesium oxide to the iron catalyst increases its selectivity towards C-alkylation in ortho-position. It was found that the active phase in the investigated catalysts is highly dispersed magnetite or mixed spinel of Fe(MgFe)O4 type. It is noticed that if Fe+2 ions are replaced by Mg+2 ions in the spinel the basicity of the bifunctional catalyst is augmented, increasing ortho-selectivity of alkylation.Keywords
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