Instituto Mexicano Del Petroleo

Patricia Rayo Mayoral

Jorge Ancheyta Juárez

Samir Kumar Maity

Mohan Singh Rana

Guillermo Centeno Nolasco

Gustavo Jesus Marroquin Sanchez

Jorge Fernando Ramirez Solis

Salvador Castillo Cervantes

José Antonio Toledo Antonio

Fernando Alonso Martínez

Gustavo Jesús Marroquín Sánchez

Jorge Fernando Ramírez Solis

Magally Cruz Juárez

Carlos Cureño Rodríguez

Pedro Martin Vega Merino

The present invention deals with activation and start-up procedures of catalysts for the deep HDS of middle distillates for producing ultra low sulfur diesel (ULSD), consisting of two in situ activation stages: at stage 1, TGA is applied, and at stage 2, DMDS is used; kerosene is the transport means at these stages, which are carried out under given temperature and pressure conditions, and feedstock and hydrogen flows at established times. After the activation of the catalyst in situ, the stabilization stage takes place under selected temperature and pressure conditions, feedstock and hydrogen flow at established times, with which the stabilization of the highly dispersed metallic sulfides is achieved and, in this way, the activity of the catalysts removing contaminants for the production of ULSD is increased.

Process for the activation and start-up of catalysts for deep hydrodesulfurization of middle distillates

A hydrocracking catalyst having a support of a composite of mesoporous materials, molecular sieves and alumina, is used in the last bed of a multi-bed system for treating heavy crude oils and residues and is designed to increase the production of intermediate distillates having boiling points in a temperature range of 204&#xb0; C. to 538&#xb0; C., decrease the production of the heavy fraction (&#x3e;538&#xb0; C.), and increase the production of gasoline fraction (&#x3c;204&#xb0; C.). The feedstock to be processed in the last bed contains low amounts of metals and is lighter than the feedstock that is fed to the first catalytic bed.

Mesoporous composite of molecular sieves for hydrocracking of heavy crude oils and residues

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

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

Growing community of inventors

Mexico City, Mexico

Patricia Rayo Mayoral