| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method which enables production of an ultra-low sulfur content gas oil base having a sulfur content of not more than 1 mass ppm by using the existing desulfurization plant for gas oil manufacturing. <P>SOLUTION: The method for manufacturing the ultra-low sulfur content gas oil base having a sulfur content of not more than 1 mass ppm comprises a step (1) of hydrodesulfurizing a gas oil fraction having a sulfur content of≤1.6 mass% under the conditions of an LHSV of 0.05-1.2 h<SP>-1</SP>, a hydrogen to oil ratio of 200-800 NL/L, a reaction temperature of 300-390°C, and a hydrogen partial pressure of 2-9 MPa, a step (2) of recovering the formed oil from the step (1), and a step (3) of removing a light oil fraction of 0.1-8 vol% based on the total amount of the formed oil from the formed oil recovered from the step (2) at a pressure lower than atmospheric pressure so that the end point of the light oil fraction to be removed becomes≥200°C. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
