| 摘要 |
<p>Dimethyl terephthalate is produced by air oxidn. of p-xylene/methyl p-toluate mixts, esterification of the acids produced, and recycling of the methyl toluate to the oxidn. step, the catalyst for oxidn. and esterification being a combination of Co cps. and cpds. of subgp. VI metals. The concns. of Co and the second component are each 0.005-1%, pref. 0.005-0.05%.</p> |
