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. 24, 2002
Filed:
Jul. 13, 2000
Applicant:
Inventors:
Assignee:
Rhodia Chimie, Boulogne Billancourt Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
C07C / ;
Abstract
A subject-matter of the present invention is a process for the sulfonation of an activated or deactivated aromatic compound. The invention applies to the preparation of aromatic sulfones. The process for the sulfonation of an aromatic compound according to the invention comprises the reaction of said aromatic compound with a sulfonating agent, in particular an aryl or alkyl sulfonating agent, in the presence of a catalytically effective amount of a mixture of a bismuth trihalide and of perfluoroalkanesulfonic acid.