The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2011
Filed:
Oct. 28, 2009
José Geraldo Furtado Ramos, Rio de Janeiro, BR;
Eduardo Cardoso DE Melo Guerra, Petrópolis, BR;
José Mozart Fusco, Niterói, BR;
Aurélio Medina Dubois, Rio de Janeiro, BR;
Wilson Kenzo Huziwara, Rio de Janeiro, BR;
Waldir Pedro Martignoni, São Mateus do Sul, BR;
José Geraldo Furtado Ramos, Rio de Janeiro, BR;
Eduardo Cardoso de Melo Guerra, Petrópolis, BR;
José Mozart Fusco, Niterói, BR;
Aurélio Medina Dubois, Rio de Janeiro, BR;
Wilson Kenzo Huziwara, Rio de Janeiro, BR;
Waldir Pedro Martignoni, São Mateus do Sul, BR;
Petróleo Brasileiro S.A. - Petrobras, Rio de Janeiro, BR;
Abstract
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.