| 摘要 |
Process for the preparation of a phenol by an oxidative decarboxylation in the liquid phase of a corresponding arylcarboxylic acid in the presence of a Cu(I)-containing catalyst, characterized in that an oxidative decarboxylation is carried out at a temperature between 191-270 DEG C, in the presence of water, with such an amount of oxygen being added that so much copper remains present as Cu(I) that a selectivity to phenol is obtained of more than 92% measured at 1 bar, and phenol is separated off. The oxidative decarboxylation is preferably carried out by: a) oxidation of the catalyst at a temperature of 191-240 DEG C for at most 20 minutes, with such an amount of oxygen being added that at least 0.04 wt.% copper remains present as Cu(I); b) reaction of the oxidized catalyst of step a) and formation of the phenol in the absence of oxygen, in the presence of water, at a temperature of 210-270 DEG C. f |
