| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an excellent method of regenerating a used hydrogenation catalyst in which the performance is high, and causes little decrease of catalytic activity at the time of sulfurization and catalyst use. <P>SOLUTION: In the method of regenerating a hydrogenation catalyst, a used hydrogenation catalyst is calcined in the atmosphere where oxygen exists in a first process to obtain a calcined catalyst, then the calcined catalyst is impregnated to a chelating agent-containing aqueous solution that contains a chelating agent and moisture to obtain an impregnation catalyst in a second process. In a third process, the impregnation catalyst is aged at 80 to 150°C while keeping the liquid amount [%] of the chelating agent-containing aqueous solution contained, as calculated by the following Formula (1):ä(W2-W1)/W1}×100, at≥50% to obtain an aging catalyst, then in a fourth process, the aging catalyst is dried at≤300°C to obtain the regenerated catalyst. In the formula (1), W1 is the mass of the catalyst after drying the hydrogenation catalyst at 500°C after the end of the third process, and W2 is the mass of the catalyst at the third process end. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
