在研究从环己烷以一步液相空气氧化法制备己二酸中,我们采用了一种新催化剂,它能使收率比通常的二步法有很大提高。目前己二酸几乎都是用二步氧化法制备的,即:首先用空气然后用硝酸氧化(1,2),工艺流程如图1所示。一般来说,环己烷在150—160℃由空气氧化成环己酮和环己醇混合物(1—6)。为了保持这一步有良好的选择率,环己烷的转化率应控制在 In the study of the preparation of adipic acid from cyclohexane in one-step liquid-phase air oxidation, we have employed a new catalyst which yields a substantial increase in yield over the usual two-step process. At present, almost all of the adipic acid is prepared by the two-step oxidation method, that is, the air is first oxidized with nitric acid (1, 2), and the process flow is as shown in FIG. 1. In general, cyclohexane is oxidized by air to a mixture of cyclohexanone and cyclohexanol (1-6) at 150-160 ° C. In order to maintain a good selectivity for this step, the conversion of cyclohexane should be controlled