| 摘要 |
<p>In the preparation of monomethyl terephthalate or a mixture thereof with p-toluic acid through liquid phase oxidation of methyl p-toluate or a mixture of methyl p-toluate with p-xylene with molecular oxygen, an improved method whereby the oxidation reaction is performed at 160 DEG -250 DEG C., in the presence of a catalyst system comprising (A) nickel metal or a nickel compound, and (B) managanese metal or a manganese compound. This method achieves, in comparison with the conventional practices using cobalt compounds as the catalyst, preparation of less colored monomethyl terephthalate at greater reaction rates and higher yields.</p> |
