| 摘要 |
1,158,926. Oxidation of aliphatic and cycloaliphatic hydrocarbons. HALCON INTERNATIONAL Inc. 8 Sept., 1966 [9 Sept., 1965], No. 40149/66. Heading C2C. Oxidation of an aliphatic or cycloaliphatic hydrocarbon in a liquid phase with molecular oxygen in the presence of a compound which forms a borate ester with the alcohol product of oxidation; wherein the oxidation mixture is hydrolysed, the hydrolysis mixture is separated into an organic phase and an aqueous boric acid phase, the aqueous boric acid phase is crystallized, boric acid crystals are separated from aqueous boric acid mother liquor and the aqueous boric acid mother liquor is re-cycled to the hydrolysis: is improved by blanketing the aqueous boric acid phase and the aqueous boric acid mother liquor with an inert gas. The oxidation of aliphatic hydrocarbons having 10-30 carbon atoms and cycloalkanes may be carried out in the presence of ortho-boric, meta-boric or tetra-boric acids or boron oxide or a boric acid ester. The aqueous solutions are preferably blanketed with carbon dioxide, helium, argon or, particularly, nitrogen. The preparation of cyclohexanal and cyclohexanone from cyclohexane is described.
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