| 摘要 |
Phenanthrene, anthracene, fluorene, or mixtures thereof, are converted to fluorenone and biphenyl products by a catalytic oxycracking step using an oxygen-containing gas and steam. The reaction conditions used are 700-1250 DEG F (317-677 DEG C) temperature and preferably 5-50 psia pressure (0.35-3.5 kg/cm<2> absolute). If desired, the intermediate products of fluorenone and biphenyl can be thermally hydrocracked to produce additional benzene. Raw hydrocarbon feed materials having a normal boiling range of 500-900 DEG F (260-482 DEG C) can be treated by hydrodealkylation to provide the fused polynuclear aromatic feedstock to the catalytic oxycracking step. Also, intermediate products from the oxycracking step are preferably hydrocracked in the same hydrodealkylation step to produce a benzene product. <IMAGE> |
