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:
Jul. 24, 2001
Filed:
Jun. 24, 1999
Dominique Commereuc, Meudon, FR;
Hélène Olivier, Rueil Malmaison, FR;
Lucien Saussine, Croissy sur Seine, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
A process for treatment of metathesis catalysts for olefins comprises sending the particles of catalysts through at least one vibratory helicoidal conveyor, subject the particles over at least a portion of their path and preferably over a large portion of their path to a temperature profile, and bringing the particles into contact with at least one fluid over at least a portion of their path. A vibratory helicoidal lifting device (,) makes it possible to regenerate metathesis catalysts for olefins: it comprises a combustion zone (,) and a calcination zone (,), as well as a preheating zone, a zone for stripping hydrocarbons and a zone for cooling the catalyst.