Petroleo Brasileiro S.a. - Petrobras

Universidade Federal Do Parana

Jorivaldo Medeiros

Wilson Kenzo Huziwara

Emanuel Freire Sandes

Aurélio Medina Dubois

José Geraldo Furtado Ramos

Mauro Silva

Nelson Patricio Junior

Donizeti Aurelio Silva Belato

Jorge Roberto Duncan Lima

Paulo Sérgio Freire

Jose Geraldo Ramos

Thiago Geraldo Da Silva

Angelo Jose Gugelmin

Walcondiney Pereira Nunes

Joilson De Souza Rangel Junior

Andre Albuquerque Thomas E Brandão

Rodrigo Andre Hoppe

Carlos Akio Soki

Claudio De Oliveira Mendonça

Alex Geraldo Rodrigues Do Pilar

José Eduardo Gubaua

Carlos Alberto Bavastri

Gabriel De Almeida Pereira

Eduardo Márcio De Oliveira Lopes

Milena Watanabe Bavaresco

Cláudio Fonseca Machado Dos Santos

Paulo Sérgio Moreira Assumpção

Andréa De Rezende Pinho

Moacir Jose Bampi

Francisco Carlos Barros

Claudio Fonseca Santos

Ingrid Alexandra Zech

Monica Einsfeldt

Maria Celia Da Rocha

Jucélio Tomás Pereira

William Victor Candido

Jose Antonio Vieira

Jorge Roberto Lima

Donizeti Aurelio Belato

Marcelle Vensao Foschiani

Shelton Relim Cercal

José Antonio Vidal Vieira

Marcell Vensão

A dynamic viscoelastic vibration neutralizer for industrial pipes includes a metallic housing, to which the shaft supports are fixed, by screws. The supports of the viscoelastic pieces and the supports of the housing itself, allow the junction of the device with the system to be controlled. An oscillating mass, fixed in the center of a metallic shaft, is supported by the shaft supports. two sets of viscoelastic pieces, are fixed by one of their ends to the supports of the viscoelastic pieces and by the other to the oscillating mass.

Tunable viscoelastic neutralizer with oscillating mass on shaft for control of vibrations in pipes in general

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 process for the fluid catalytic cracking of heavy feeds under a heat balance regime is described, where one or more catalyst coolers external to the regenerator cool a stream of regenerated catalyst. A portion of said stream returns to the regenerator and a portion of the cooled regenerated catalyst is admixed to the non-cooled regenerated catalyst at a temperature substantially lower than the regenerator temperature, said admixture being brought into contact with the hydrocarbon feed to be cracked. As a result, the control of the catalyst circulation is rendered independent from the heat balance of the unit, with minimization of the thermal cracking, and therefore lower coke and fuel gas products.

Process for the fluid catalytic cracking of heavy feedstocks

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Rio de Janeiro, Brazil

Jorivaldo Medeiros