| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of desulfurized light oil in which the sulfur content is greatly reduced by hydrotreating than conventional methods and the color is good as well. SOLUTION: Into a reactor having a preceding stage catalyst bed 2 and a latter stage catalyst bed 3 with structure capable of introducing hydrogen and a formed oil into the catalyst beds respectively, hydrogen and a raw oil composed of petroleum distillates with a sulfur content of 0.1-3 mass% and a boiling range of 150-400°C are introduced under conditions of 300-390°C in the mean temperature of all the catalyst beds and a pressure of 2-8 MPa, wherein, the ratio b/a of the amount b of hydrogen introduced into the latter stage catalyst bed to the amount a of hydrogen introduced into the preceding stage catalyst bed is set to 0.05-5. At this time, the ratio b/a of the amount of hydrogen may be set to 0.05-2 and 10-60% of the formed oil may be introduced into the latter-stage catalyst bed by circulation, and water may be introduced additionally or independently. COPYRIGHT: (C)2009,JPO&INPIT
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