| 摘要 |
Alcohols are prepared by oxidizing a hydrocarbon in the liquid phase with an oxygen-containing gas in the presence of a dehydrated form of ortho-boric acid, removing vapours comprising hydrocarbon and water from the reaction mixture, contacting said vapours with a first liquid hydrocarbon feed, thereby heating said feed and cooling said vapours, subjecting the thus heated first hydrocarbon feed to further heating and introducing this feed into the oxidation reaction mixture, contacting said cooled vapours with a slurry of ortho-boric acid in said hydrocarbon, thereby dehydrating the ortho-boric acid to meta-boric acid, feeding said meta-boric acid and said hydrocarbon to the oxidation reaction mixture, and contacting the vapours from the dehydration step with a second liquid hydrocarbon feed and passing said feed directly to said oxidation reaction mixture. The alcohols are recovered by hydrolysis of the borate ester-containing reaction mixture. It is preferred to heat the first hydrocarbon feed to up to 185 DEG C., thus vaporizing some of the hydrocarbon, and feeding both the liquid and vapour to the reaction mixture. Suitable oxidation temperatures are 75-300 DEG C. and suitable dehydration temperatures 100-160 DEG C. Preferred reactants are C4- 8 saturated hydrocarbons. The process is illustrated by reference to drawings (not shown) of a schematic flow diagram as applied to the oxidation of cyclohexane.
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