| 摘要 |
PURPOSE:To permit the efficient production of fluorenone of high purity from fluorene with no formation of by-products using a specific amine derivative as an oxidation catalyst economically in a shortened time. CONSTITUTION:To 2.5 to 30wt.% fluorene solution, is added 35 to 50wt.% of alkali aqueous solution and a catalyst aqueous solution. Then, oxygen is introduced into the mixture in an amount of 1.0 to 1.5 mole per mole of the fluorene. As the oxidation catalyst, is used an aqueous solution of 30 to 70wt.% concentration of one or more amine derivatives of the formula I (R<1> is H, lower alkyl; R<2> is lower alkyl; a is 1 to 2; X is SO4<-->, CH3SO4<--> where when X is SO4<-->, a=2; when X is CH3SO4<-->, a=1), particularly N,N-dimethylaniline is preferred). The catalyst is obtained, for example, by mixing N,N-dimethylaniline with dimethyl sulfate, stirring the mixture at room temperature, admixing water thereto, dripping IN sodium hydroxide until the pH reaches 7, filtering off the precipitate and adding water to the filtrate. |
