In the presence of acetic acid and polyethylene glycol, chromic anhydride and acenaphthene react under mild condition and acenaphthene can completely convert into acenaphthenone.

醋酸、聚乙二醇存下 ,铬酸酐温的条件下反应 ,可以完全转化为。

The improvement of the purity of fluorene is not dependent on the removal of acenaphthene and dibenzofuran, but dependent on the separation of other impurities.

度的提高主要不是依赖、氧的去除,而是其它杂质的分离。