Instituto Mexicano Del Petroleo

Gustavo Jesús Marroquín Sánchez

Jorge Ancheyta Juárez

Guillermo Centeno Nolasco

Salvador Castillo Cervantes

Patricia Rayo Mayoral

José Antonio Toledo Antonio

José Antonio Domingo Muñoz Moya

Frenando Alonso Martínez

Magally Cruz Juárez

Anton Alvarez Majmutov

Carlos Cureño Rodríguez

Pedro Martin Vega Merino

Gerardo Betancourt Rivera

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 process for reducing sulfur, nitrogen, metals and asphaltene contents, while increasing the yield of distillable fractions in heavy hydrocarbons, by using a cooled light fraction as a liquid quench stream. The light fraction is obtained by splitting heavy hydrocarbons into a heavy fraction, and a light fraction which may be injected at spaced locations along a system of fixed-bed reactors series that comprises a first hydrodemetallization (HDM)/hydrodeasphaltenization (HDAs) step, followed by a second hydrodesulfurization (HDS)/hydrodenitrogenation (HDN)/hydrocracking step. The metal and asphaltene rich heavy fraction have contact with the entire catalyst system, while the light fraction is injected as side feed and quench stream(s) into the second reactor, where it is treated in admixture with the heavy fraction for elimination of the impurities of the light fraction.

Hydroprocessing of heavy hydrocarbons using liquid quench streams

Two-stage low pressure catalytic hydrotreatment of heavy petroleum hydrocarbons having a high content of contaminants (metals and asphaltenes), is conducted under operating conditions with low-pressure, in a fixed bed or ebullated bed reactor to limit the formation of sediments and sludge in the product and obtain a hydrotreated hydrocarbon of improved properties, with levels of contaminants, API gravity and distillates within the ranges commonly reported in the feedstocks typical to refining schemes. A hydrotreatment catalyst, whose principal effect is the hydrodemetallization and the hydrocracking of asphaltenes of the heavy hydrocarbons of petroleum is used in the first stage, and the second reaction stage employs a hydrotreatment catalyst for a deeper effect of hydrodesulfurization of the heavy petroleum hydrocarbon whose content of total sulfur is reduced to a level required for its treatment in the conventional refining process or for its sale as a hydrocarbon of petroleum with improved properties.

Process for the catalytic hydrotreatment of heavy hydrocarbons of petroleum

Growing community of inventors

Delegación Gustavo A. Madero, Mexico

Gustavo Jesús Marroquín Sánchez