JP2012139626A5 - - Google Patents

Claims (6)

A used hydrocarbon oil hydrotreating catalyst in which at least one active metal component selected from Groups 6 and 8 to 10 of the periodic table is supported on a support is calcined at a temperature exceeding 300 ° C. The first step;
A second step of bringing the hydrotreating catalyst calcined in the first step into contact with an acid solution containing both an inorganic acid and a chelating agent and dispersing the active metal component on the support. A method for regenerating a hydroprocessing catalyst.   The hydrogenation according to claim 1, wherein the ratio of the number of moles of the inorganic acid to the number of moles of the chelating agent contained in the acid solution used in the second step is in the range of 0.01 to 0.2. Method for regenerating treated catalyst. The method includes a third step of performing at least one of drying or firing on the hydrotreating catalyst brought into contact with the acid solution containing both the inorganic acid and the chelating agent in the second step. Item 3. A method for regenerating a hydrotreating catalyst according to Item 1 or 2.   The method for regenerating a hydroprocessing catalyst according to any one of claims 1 to 3, wherein the active metal component is at least one metal selected from molybdenum, cobalt, and nickel.   In the acid solution containing both the inorganic acid and the chelating agent in the second step, at least one active metal component selected from Groups 6 and 8 to 10 of the periodic table is added. In the step, the hydrotreating catalyst is brought into contact with an acid solution containing these active metal components, thereby dispersing the active metal component supported on the carrier and the active metal component added to the acid solution to the carrier. The method for regenerating a hydroprocessing catalyst according to any one of claims 1 to 4, wherein the catalyst is supported.   In the acid solution, at least one active metal component selected from molybdenum, cobalt, and nickel is converted into an oxide of the active metal component based on the mass of the hydrotreating catalyst obtained in the first step. 6. The method for regenerating a hydroprocessing catalyst according to claim 5, comprising an amount corresponding to 1% by mass or less in terms of conversion.