Instituto Mexicano Del Petroleo

Mohan Singh Rana

Jorge Ancheyta Juárez

Samir Kumar Maity

Patricia Rayo Mayoral

Fernando Alonso Martínez

Zenaida Carolina Leyva Inzunza

Léon Pablo Torres Mancera

Jorge Fernando Ramírez Solis

An improved catalyst for hydrodemetallization of heavy crude oils and residua is disclosed. The catalyst is adopted for fixed bed hydroprocessing units. The invention is characterized for having a large pore diameter catalyst principally for hydrodemetallization of heavy oil and residue in a first reactor of a multi-reactor process. The catalyst has high demetallizing activity and high metal deposition capacity which results in good stability with time on stream (TOS). The hydrorefining catalyst is obtained by kneading a porous starting powder principally composed of gamma-alumina and having a pore capacity of 0.3-0.6 ml/g or larger and a mean pore diameter of 10 to 26 nm, extrudating and calcining, and after that supported with active metals component of elements belonging to groups VIIIB and VIB of the periodic table.

Catalyst for the first hydrodemetalization step in a hydroprocessing system with multiple reactors for the improvement of heavy and extra heavy crudes

This invention reveals a method for synthesizing a hydrotreating catalyst wherein the support is prepared by mixing of peptized alumina with an amorphous silica or crystalline aluminum silicate as one component of the catalyst. The catalyst comprises a group VI metal and/or a group VIII metal of the periodic table. The catalyst exhibits improved hydrocracking, hydrodesulfurization and hydrodemetallization activities and has a relatively stable life with time on stream. Thus, the invention concerns a method for developing a catalyst for hydroprocessing of heavy hydrocarbon feedstocks which is characterized by two steps: the first step consists of the optimization of a catalyst formulation with respect to the textural properties, number of acid sites, active metal incorporation. The second step consists of the evaluation with real feedstock and catalyst stability with time-on-stream.

Mild acidic catalyst for hydroprocessing of heavy crude oil and residue and its synthesis procedure

A catalyst for hydrotreating, especially hydrodesulfurization, of residua and heavy crudes is prepared by synthesizing the support from titanium and boehmite, to form either a titanium/alumina support (TiO/AlO) or a titanium-alumina support (TiO&#x2014;AlO) that is thereafter provided with at least one hydrogenating metal from group VIB in oxide form and a promoter from group VIII also in oxide form. The (TiO/AlO) support is prepared from boehmite, which is peptized by using an inorganic acid, then extruded, calcined and impregnated with a solution containing titanium, while the (TiO&#x2014;AlO) support is prepared by admixing boehmite with a titanium-containing solution, peptized using an inorganic acid, extruded and calcined to obtain the titanium-alumina support.

Catalyst, its preparation and use for hydrodesulfurization of residua and heavy crudes

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Mexico City, Mexico

Mohan Singh Rana