One-step oxidation of cyclohexane

Using cyclohexane as raw material, acetic acid as solvent, cobalt and bromide as catalyst, at 2MP. And 90 ℃ of reaction 10 ~ 13h. Yield 75%.

Stepwise oxidation of cyclohexane

The preparation of KA oil can be directly oxidized with air at 1.0～2.5MPa and 145～180℃, and the yield can reach 70%～75%. Metaboric acid can also be used as a catalyst for air oxidation at 1.0-2.0MPa and 165°C, the yield can reach 90%, and the ratio of alcohol to ketone is 10:1; The boric acid is recovered from the layer, and dehydrated into metaboric acid for recycling; the organic layer is saponified with caustic soda to saponify the organic ester, and the acid is removed, and the alkanol-ketone mixture is obtained after recovering cyclohexane by distillation.

Oxidation of KA oil KA oil was oxidized with excess 50%-60% nitric acid in two-stage series-connected reactors at 60-80°C and 0.1-0.4MPa. The catalyst is copper-vanadium series (copper 0.1%-0.5%, vanadium 0.1%-0.2%), and the yield is 92%-96% of the theoretical value. After the reactant is distilled out of nitric acid, high-purity adipic acid can be obtained through two crystallization purifications