| 摘要 |
PURPOSE:To continuously obtain the title substance in high yield by further oxidizing a reaction liquid obtained by subjecting an aromatic compound having alkyl group on an aromatic ring to air oxidation under neutral or basic conditions using H2O2, etc., and subjecting the oxidation product to acid decomposition. CONSTITUTION:An aromatic compound having 1-5 alkyl groups on an aromatic ring is subjected to air oxidation to give a carbinol group-containing compound and carbinolhydroperoxy group-containing compound, which are then brought into contact with hydrogen peroxide and an acid catalyst (e.g. sulfuric acid or benzenesulfonic acid) to provide the title substance. The contact of H2O2 with the acid catalyst is continuously carried out in twin reaction tanks arranged in series and simultaneously conditions in the first reaction tank are set so that carbinol group-containing compound may be preferentially converted into a carbinol hydroperoxy group-containing compound in a solvent such as nitriles, etc., and then subjected to acid decomposition in the second reaction tank to provide the aimed compound. |
