| 摘要 |
<p>F-0605 MULTI-STAGE PROCESS FOR DEMETALATION AND DESULFURIZATION OF PETROLEUM OILS Hydrocarbon oils, preferably residual fractions, are catalytically hydroprocessed to remove metals, sulfur, and Conradson Carbon Residue by contacting the oil sequentially with three or more catalysts having sequentially decreasing average pore diameters and sequentially increasing surface areas.</p> |
