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:
Dec. 07, 2004
Filed:
Dec. 18, 2002
Philibert Leflaive, Bures sur Yvette, FR;
Luc Wolff, Lyons, FR;
Alain Methivier, Marly le Roi, FR;
Gérard Hotier, Rueil Malmaison, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
A coproduction process for ortho-xylene and para-xylene starting with a batch of hydrocarbons comprises a simulated counter-current fluidized bed system in a chromatographic column ( ) containing at least five zones, comprising injection ( ) of the batch and injection ( ) of desorption agent and delivering an extract ( ), a refined product ( ), and an intermediate refined product ( ). Refined product ( ), richer in ortho-xylene than the intermediate refined product, is distilled ( ) to extract desorption agent ( ) and is injection, according to the second step of the process, into a simulated counter-current fluidized bed system ( ) delivering an extract ( ) and a refined product ( ) continuously.