Alkylphenol Conversions under High-Temperature Hydrogenation Conditions: Examples of 2-Propylphenol and 2-tert-Butyl-6-Methylphenol Using Molybdenum- and Chromium-Containing Catalysts Based on Zeolite ZSM-5

Abstract

The results of high-temperature hydrogenation of the phenolic fraction of coal tar from AO Shubarkol Komir, 2-propylphenol, and 2-tert-butyl-6-methylphenol, in the presence of molybdenum and chromium oxides on ZSM-5 zeolite (MoO₃/ZSM, Cr₂O₃/ZSM) are presented. It was found that the hydrogenation of phenols with linear and branched alkyls under identical conditions differed in the process direction. For the MoO₃–ZSM catalyst, dealkylation–reduction led to the formation of aromatic hydrocarbons, while for the Cr₂O₃–ZSM catalyst, dealkylation–reduction and disproportionation led to the formation of light phenols.