Instituto Mexicano Del Petroleo

Leonardo Díaz Garcia

Alicia Del Rayo Jaramillo Jacob

Maria Teresa Gómez Pérez

Blanca Lucía Medellín Rivera

María Del Rosario Socorro Luna Ramírez

Maria Teresa Cortez De La Paz

Gonzalo Hernández Tapia

The present invention is an in-situ cleaning procedure for the recovery of catalytic activity of a based alumina HDS catalyst, molybdenum, nickel coated coke and contaminants and it has an HDS activity seriously diminished. The catalyst under study had between 13 and 18 wt % total carbon. Reformate, half the total volume, industrial toluene=35 volume % and Iso-propylic alcohol, 15 volume %, in order to reactivate a deactivated catalyst, a solvent mixture with the following volumetric ratio is prepared. Or it can also be used only reformate (100% volume). The solvent mixture is passed using a LHSV of 2 hr&#x2212;1 for 72 hours at 50&#xb0; C. or also using a recirculating three 24-hour cycles at 50&#xb0; C. Option lasts 24 hours pure reformate LHSV=2h&#x2212;1 to 50&#xb0; C. The washed catalyst is fed back to the load reaction conditions maintained for 36 hours at 340&#xb0; C., to initiate HDS activity balances. During this treatment oxides of molybdenum and nickel in the active phase are re-sulfided by increasing the HDS activity. The In-Situ Cleaning procedure to reactivate deactivated hydrotreating catalysts used to partially remove the carbon and increase the active phase of molybdenum di-sulphide, and also retrieve specific area, and hydrogenation sites that promote higher hydrodesulfurization activity of gasoil after this treatment.

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México, Mexico

Leonardo Díaz Garcia