Petroleo Brasileiro S.a. - Petrobras

José Geraldo Furtado Ramos

Wilson Kenzo Huziwara

Aurélio Medina Dubois

José Mozart Fusco

Emanuel Freire Sandes

Eduardo Cardoso De Melo Guerra

Paulo Sérgio Freire

Mauro Silva

Nelson Patricio Junior

Paulo Sergio Freire

Waldir Pedro Martignoni

Andrea De Rezende Pinho

Jorivaldo Medeiros

Luiz Carlos Casavechia

Shelton Rolim Cercal

Paulo Sérgio Moreira Assumpção

Moacir José Bampi

José Loreto Moreira De Faria

Cláudio Damiance Baptista

Edson José Joaquim De Souza

Walcondiney Pereira Nunes

Naiara Dos Santos Lages

Cláudio Fonseca Machado Dos Santos

Andréa De Rezende Pinho

Geovani Aliatti

Ricardo Serfaty

Emmanuel Freire Sandes

Pinho Andrea De Rezende Rezende

Aurélio Medina Dubios

Nelson Junoir Patricio

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 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 feed-dispersion system for hydrocarbon feeds of fluid catalytic cracking units is described, which comprises:

Feed-dispersion system for fluid catalytic cracking units

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Rio de Janeiro, Brazil

José Geraldo Furtado Ramos