Petroleo Brasileiro S.a. - Petrobras

Petróleo Brasileiro S.a. - Petrobas

Donizeti Aurelio Silva Belato

Jorge Roberto Duncan Lima

Wilson Kenzo Huziwara

Jose Antonio Vidal Vieira

Ademaro Marchiori

Angelo Jose Gugelmin

William Victor Carlos Candido

Jose Luiz Zotin

Paulo Sérgio Freire

Carlos Alberto De Araujo Monteiro

Shelton Rolim Cercal

Rogério Michelan

Nelson Patrício, Jr

Jorilvaldo Medeiros

Denise Barcellos Da Rocha Monteiro

Roberto Ruva

Marcelle Vensão Camargo Foschiani

Alinson Francisco Geros

Fabricio Torres

Carlos Otavio Brito

Shelton Relim Cercal

José Antonio Vidal Vieira

Marcell Vensão

The present invention describes a method for refining highly polyaromatic and nitrogenated charges, such as LCO streams, comprising hydrotreating (HDT) as the first reaction stage, followed by the intermediate separation of gases generated in the HDT section, then by a second reaction stage consisting in moderate hydroconversion/hydrocracking and in a rectifying and/or fractionating section, thus allowing more flexible production of fuels. In the rectification mode, the claimed method yields a diesel oil fraction with higher cetane content, reduced density and volumetric yield increase of at least 111% relative to the process charge, thus minimising yield losses through naphtha overcracking and contributing to the optimisation of the required hydrogen consumption. In the fractionating mode, different cuts and their compositions can be produced, such as naphtha, kerosene and diesel.

Refining process for highly (poly)aromatic and nitrogenated charges

This invention relates to a device for cooling and distributing mixed charges on fixed catalyst beds for use in the cooling zone of descending flow reactors which comprises a flat tray fitted with collector and distributor tubes for liquid superimposed upon and connected to another flat tray of similar design to the upper tray. The device, which is of smaller size in comparison with other commercially available devices, is extremely simple to install industrially and compact, and has as its main characteristic the efficiency with which it promotes reduction of the temperature of the reaction medium when it receives the cooling fluid within the catalytic reactor.

Device for cooling and distributing mixed charges on fixed catalyst beds

The present invention relates to a device and respective process for distribution of mixed charges comprising a flat tray in the form of a disc drained by a series of drainage tubes located above the surface of fixed beds of catalysts, capable of promoting the homogenisation and distribution of charges by means of said device. Such drainage tubes mounted in said manner have the objective of restricting and reorienting the flow of mixed charges, multiplying the points whereon they fall, principally of the liquid phase, onto said beds of catalysts. For the purpose of doing so said drainage ducts, being segments of tubes, distributed on the entire surface of said tray possess caps affixed at the upper extremity thereof impeding the direct flow of charge onto the bed of catalyst, creating a reservoir of liquid on the tray, subsequently being drained down such device in a more controlled manner.

Device and process for distribution of mixed charges onto fixed beds of catalyst in descending-flow reactors

A distributor nozzle for a two-phase charge, to be used in fixed-bed reactors in order to increase the area over which the mixture is dispersed and to make its flow rate the same over the whole area of the bed in the reactor. The device includes a number of fixing bars and a deflector cone frustum. The deflector cones or cone frusta may have more than one angle in order to improve the distribution, and they have a number of apertures or slits and a number of vertical directing elements or a directing cage or frame to direct the stream of the two-phase charge in order to increase the area over which the mixture is dispersed and to make its flow rate the same over the entire area of the bed in the reactor.

Distributor nozzle for a two-phase charge in fixed-bed reactors

Growing community of inventors

Rio de Janeiro, Brazil

Donizeti Aurelio Silva Belato