The research on the preparation process of 9-fluorenone has a history of 70 years, and researchers from various countries have done a lot of research work and achieved certain results. However, methods with low cost, high yield, no pollution or less pollution are still under development. At present, there are usually two preparation process routes of 9-fluorenone: one is the synthesis process of non-fluorene raw materials, and the other is the catalytic oxidation process of fluorene.
