| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a regeneration method capable of sufficiently recovering desulfurization activity of a used hydrotreatment catalyst. <P>SOLUTION: The regeneration method for the used hydrotreatment catalyst for hydrocarbon oil includes: an oil removing process of subjecting oil removing treatment to the used hydrotreatment catalyst supporting group 6 metals in the periodic table, group 8 metals in the periodic table and phosphorus, whose activity is lowered by being used in the hydrotreatment of the hydrocarbon oil; a firing process of firing the hydrotreatment catalyst after the oil removing process at 300-600°C; a supporting process for making a fired material obtained by the firing process support organic acid and phosphorus so that the molar ratio of [organic acid]/[group 8 metals in the periodic table] is 0.6-1 and the molar ratio of [phosphorus excluding the phosphorus contained in the fired material after the firing process and before the supporting process (as P<SB POS="POST">2</SB>O<SB POS="POST">5</SB>)]/[group 6 metals in the periodic table] is 0.05-0.3; and a drying process of drying the fired material after the supporting process at or below 200°C. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
