| 摘要 |
<p>PROBLEM TO BE SOLVED: To stably obtain fluorenone in a high yield by subjecting fluorenone to a catalytic gas phase oxidation. SOLUTION: The objective fluorenone is obtained by subjecting fluorene and a molecular oxygen-containing gas to a catalytic gas phase oxidation at 250-480 deg.C and 100-10,000/hr space velocity in the presence of a catalyst. In the reaction, a concentration of sulfur in fluorene as the raw material is made below 0.15wt.%. Vanadium, titanium oxide and an alkali metal sulfate are preferably used as the catalyst and an atomic ratio of the alkali metal to vanadium is 0.8-8, especially a catalyst carrying the catalyst-activating component on an inert carrier such as silicon carbide or alumina is preferably used.</p> |
