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:
Sep. 10, 2002
Filed:
Apr. 24, 2000
Julia Magne-Drisch, Vilette de Vienne, FR;
Fabio Alario, Neuilly sur Seine, FR;
Jean-François Joly, Lyons, FR;
Ari Minkkinen, Saint Nom la Breteche, FR;
Elisabeth Merlen, Rueil Malmaison, FR;
Institut Francais du Petrole, , FR;
Abstract
A process for the production of paraxilene comprises an adsorption stage ( ) using toluene as a desorbent in a simulated moving bed of a feedstock previously depleted in ethylbenzene by distillation ( ) or by adsortion, an isomerization stage ( ) without hydrogen in liquid phase diluted with toluene from the raffinate produced, a distillation stage ( ) of the raffinate that is isomerized to recover the toluene ( ) that is recycled. The separated isomerate is introduced into a xylene distillation column ( ). The separated ethylbenzene is isomerized separately in gas phase with hydrogen at higher temperature and is distilled ( ) in the presence of a catalyst that comprises an EUO-structural-type zeolite, then recycled to adsorption stage ( ).