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:
Nov. 30, 1999
Filed:
Apr. 10, 1998
Applicant:
Inventors:
Raymond Commandeur, Vizille, FR;
Dominique Audoux, Sassenage, FR;
Assignee:
Elf Atochem, S.A., Puteaux, FR;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
203-6 ; 203-7 ; 203 39 ; 203 73 ; 203 80 ; 203D / ; 203 99 ; 208 47 ; 2082621 ;
Abstract
In a process for the purification by distillation of chlorinated aromatic hydrocarbons originating from the chlorination of aromatic hydrocarbons in the presence of FeCl.sub.3, the crude reaction product is first partially degassed and then directly subjected to distillation in the presence of said FeCl.sub.3.