Petroleo Brasileiro S.a. - Petrobras

Petroleo Brasileiro S.a.

Petróleo Brasileiro S.a. - Petrobas

Wilson Kenzo Huziwara

José Geraldo Furtado Ramos

José Mozart Fusco

Aurélio Medina Dubois

Emanuel Freire Sandes

Paulo Sérgio Freire

Mauro Silva

Eduardo Cardoso De Melo Guerra

Jorge Roberto Duncan Lima

Donizeti Aurelio Silva Belato

Luiz Carlos Casavechia

Waldir Pedro Martignoni

Andrea De Rezende Pinho

Jose Antonio Vidal Vieira

Nelson Patricio Junior

Paulo Sergio Freire

William Victor Carlos Candido

Ademaro Marchiori

Shelton Rolim Cercal

Rogério Michelan

Angelo Jose Gugelmin

Carlos Nagib Khalil

Henrique Soares Cerqueira

Raphael Bezerra De Menezes

Marlito Gomes Junior

Jorivaldo Medeiros

Carlos René Klotz Rabello

Bernardo Galvão Siqueira

Julio Amilcar Ramos Cabral

Lúcia Cristina Ferreira Leite

Amilcar Pereira Da Silva Neto

Claudio Maria De Lacerda Alvarenga Baptista

Eduardo C De Melo Guerra

Andréa De Rezende Pinho

Cláudio Fonseca Machado Dos Santos

Walcondiney Pereira Nunes

Paulo Sérgio Moreira Assumpção

Carlos Otavio Brito

Alinson Francisco Geros

Fabricio Torres

Celson Murilo Dos Santos

Nelson Patrício, Jr

Tomas Shinobu Yamada

Lígia Maria Marçareli De Oliveira

Giselle De Carvalho Oliveira

William Victor Carlos Cândido

Raul De Carvalho Silva

Jorilvaldo Medeiros

Roberto Ruva

Marcelle Vensão Camargo Foschiani

Celso Murilo Dos Santos

Ligia Maria Marcareli De Oliveira

Marlito Junior Gomes

José Antonio Vidal Vieira

Nelson Junoir Patricio

Aurélio Medina Dubios

Pinho Andrea De Rezende Rezende

Marcell Vensão

Shelton Relim Cercal

Amílcar Pereira Da Silva Neto

Marcelle Vensao Foschiani

Donizeti Aurelio Belato

Jorge Roberto Lima

Jose Antonio Vieira

William Victor Candido

Lucia Cristina Ferreira Leite

A separator comprises a separation chamber () with at least one inlet () in its upper part, a solids outlet () in its lower part and two outlet pipes (and) for fractions of gas. Also described is a method which the separator uses, with the fractions of gas being sucked out in two separation zones generated inside the chamber, one with reverse flow and the other with unidirectional flow.

Cyclone separator and separation method

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 describes a process for the production of propylene glycol from glycerol, the transformation of purified glycerol to propylene glycol being carried out by means of a reaction of hydrogenolysis, in the liquid phase, where the two stages of the reaction take place simultaneously and in one and the same reactor () under specified conditions of temperature and pressure, and the effluent from the fixed-bed reactor () is led to subsequent process stages that comprise separation and purification.

Production of propylene glycol from glycerine

The present invention comprises a thermocatalytic cracking process for the production of diesel oil from a charge of vegetable origin made from seeds of oleaginous plants in refineries possessing at least two FCC reactors. At least one of such reactors processes heavy gas oil or residue under conventional conditions while at least one of such reactors processes the charge of vegetable origin made from seeds of oleaginous plants under conditions suitable, for production of diesel oil. Said process employs the same catalyst utilized in the fluid catalytic cracking process which, simultaneously, processes a conventional charge. The diesel, or biodiesel, oil produced by means of said process is of superior quality having a cetane number exceeding 40 given that the cracking reactions occur at low temperatures and the products obtained are less oxidized and consequently purer than products obtained by means of existing technology.

Catalytic cracking process for production of diesel from seeds of oleaginous plants

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

A system for sealing the legs of two stages of cyclones in series used in fluid catalytic cracking (FCC) processes, comprising a terminal leg configuration, which is devoid of moving parts and makes use of a long-radius curve, and which changes the flow direction of the descending mass flow of catalyst in dense phase into a plane orthogonal to the ascending gaseous flow. This prevents the entry of gaseous phase inside the leg, and promotes efficient sealing and preventing the 'packing-down' of the dense bed of particulates.

Sealing system for cyclone leg

The present invention relates to a system for the separation of suspensions of spent catalysts and hydrocarbons formed in an FCC unit with multiple ascending flow reaction tubes, comprising interconnections between each of the ascending flow reaction tubes and the separator vessel, each interconnection also comprises two sections. The outside sections of the separator vessel are inclined and are connected to a single vertical section, which penetrates into the interior of the separator vessel, and which has at its lower end an open device for draining the spent catalyst from the suspensions separated in this sector. In the same vertical section, at the end of its internal part at the separator vessel, a series of two sets of cyclones are installed, the first set containing cyclones without sealing legs, and the second set containing conventional cyclones of the first stage. The present invention also relates to a process for the separation of suspensions of spent catalysts and hydrocarbons using the said separation system.

System and process for the separation of suspensions of spent catalysts and hydrocarbons formed in a fluid catalytic cracking unit with multiple ascending flow reaction tubes

An improved cyclone system for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes with reduced coke formation in disengager vessels, without favoring release of the disengaged catalyst into cyclones in subsequent stages, said system comprising legless cyclonesfitted with external collector pipes, is described. The collector pipesoptimize the purge of gases coming from the disengager vessel, reducing the time the hydrocarbons remain inside the disengager vessel, thus preventing overcracking and subsequent coke formation. Positioning of the external collector pipesprevents release of the disengaged catalyst into cyclones in subsequent stages. The present invention also relates to a process and device for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes, reducing coke formation in disengager vessels and minimizing the release of catalyst into consecutive stages, said process and device being part of the system of the present invention.

Process for disengaging solid and gaseous particles in FCC processes with reduced coke formation in disengager vessels

A stripping apparatus is described for the gas-solid separation process in a fluidized bed in a counter-current flow of a stripping fluid. The apparatus includes sets of perforated baffle-plates with holes, fixed in series, alternating central and lateral plates inside a stripping chamber. The holes in the baffle-plates, in number, size and in circular or elliptical lay-out, are oriented in offset position in relation to the holes in the parallel and subsequent baffle-plates, reducing the damage of erosion on the perforated baffle-plates and optimizing stripping of the fluidized solid particles.

Stripping apparatus for the gas-solid separation in a fluidized bed

A device and a method for operating it for application in a vertical tube reactor with downward flow (downer), has the aim of ensuring the intimate mixing of the solid particulate catalyst with a reagent fluid. Homogeneous distribution of catalyst is due to the use of a plate having perforations. Said perforated plate normally allows the passage of a portion of the stream of catalyst. The other portion overflows the edge of the plate, flowing in the form of an annular curtain, near the inner surface of the surrounding tube of the device. After passing beyond the perforated plate, the curtain-flow undergoes a deflection produced by an annular screen, to be mixed with the stream originating from the orifices in the perforated plate. A hydrocarbon charge is injected below the perforated plate, forming a certain angle with respect to the direction of the downward flow of catalyst, by means of inlets distributed uniformly about cross sections of the surrounding tube. After the mixing region, the diameter of the device, when smaller than the diameter of the associated tube reactor, expands slightly.

Multifunctional entry device for a downward flow tube reactor

An improved cyclone system for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes with reduced coke formation in disengager vessels, without favoring release of the disengaged catalyst into cyclones in subsequent stages, said system comprising legless cyclonesfitted with external collector pipes, is described. The collector pipesoptimize the purge of gases coming from the disengager vessel, reducing the time the hydrocarbons remain inside said disengager vessel, thus preventing overcracking and subsequent coke formation. Positioning of the external collector pipesprevents release of the disengaged catalyst into cyclones in subsequent stages. The present invention also relates to a process and device for disengaging solid and gaseous particles in fluid catalytic cracking (FCC) processes, reducing coke formation in disengager vessels and minimizing the release of catalyst into consecutive stages, said process and device being part of the system of the present invention.

Cyclone system for disengaging solid and gaseous particles in FCC systems with reduced coke formation in disengager vessels

An apparatus for downflow fluid catalytic cracking is described, which comprises a regenerated catalyst riser carrying regenerated catalyst and a carrying fluid, those being directed through a crossover section to a distributor that will centrifuge gas and separate catalyst from carrying fluid, the catalyst being directed to a downflow reactor through a distributing basket provided with perforations. The upper part of the reactor is provided with feed injectors, which atomize the feed so that feed vaporization and feed and catalyst admixture is optimized. After the cracking reaction in downflow reactor, reaction products are separated and spent catalyst is directed to stripping and regeneration sections. The FCC process carried out in the apparatus is also described.

Apparatus and process for downflow fluid catalytic cracking

A second stage cyclone dipleg termination device for cyclones that operate under conditions in which the pressure in the top of the cyclone dipleg is lower than the external pressure where fine particulate matter is collected and discharged. The second stage cyclone dipleg termination device operates in a separator vessel () or a vessel of the regenerator of a fluid catalytic cracking (FCC) converter to reverse the pressure conditions commonly found in this type of equipment. One end of a cyclone dipleg () is joined to a collector vessel (), in such a way that a portion of the dipleg () enters into the inside of the collector vessel (). The end of the dipleg () is connected to the conventional, normally used sealing device () in second stage cyclone () diplegs (). The collector vessel (), in turn, has on its bottom an outlet in the form of the dipleg (). On the inside of this outlet an injector device is introduced () through which a fluid under high pressure is discharged, associated with a 'venturi' type nozzle (), which moves or drags the particulate matter discharged by the dipleg () of the cyclone () through the sealing valves (), inside the collector vessel () the exterior of the collector vessel ().

Second stage cyclone dipleg termination device in FCC units

Growing community of inventors

Rio de Janeiro, Brazil

Wilson Kenzo Huziwara