| 摘要 |
<p>A method of refining raw oil. This method involves the distillation/separation step 1 in which the raw oil is separated into a distilled oil M1 and a residual oil M2 by distillation, and the hydrogenation/refining step 3 in which the obtained distilled oil M1 and a light oil obtained from the residual oil M2 are hydrogenated and refined in the presence of hydrogen and catalysts. In the hydrogenation/refining step 3, the light oil (deasphaltene oil M3) is hydrogenated by passing through a first catalyst layer (a demetallizing catalyst layer 12) and a mixture of the thus hydrogenated light oil (deasphaltene oil M3) with the distilled oil M1 is hydrogenated by passing through a latter catalyst layer (a desulfurizing catalyst layer 13).</p> |
