| abstract |
(57) [Problem] To provide a method for producing cycloalkanone with high efficiency. SOLUTION: (A) A cycloalkane is brought into contact with molecular oxygen in the presence of an oxidation catalyst (oxidation reaction apparatus 2), and (B) From the reaction mixture, a catalyst, an acid component produced as a by-product, or a derivative thereof are separated, and then filtered (filtration device 3, extraction column 4, hydrolysis device 7, Saponification device 8), (C) By separating cycloalkane, cycloalkanol and cycloalkanone from the reaction mixture (distillation columns 5, 6, 9 and 10) and recycling the cycloalkanol to the reaction system And cycloalkanone can be produced efficiently. |