| 摘要 |
In a process for preparing terephthalic acid by oxidizing para-xylene and/or para-toluic acid with a gas containing molecular oxygen in the liquid phase at an elevated temperature in the substantial absence of a lower fatty acid or halogen compound a novel catalyst system is used which comprises a nickel compound and manganese compound, which are at least partially soluble in the reaction mixture, the weight ratio, calculated as metals, of the nickel and manganese being 95:5 - 0.5:99.5. The process gives terephthalic acid in a high yield at a high reaction velocity. |
