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:
Feb. 20, 2001
Filed:
Jul. 30, 1998
Applicant:
Inventors:
Jean Ollivier, Arudy, FR;
Rene Clair, Martigues, FR;
Denise Molines, Saint-Genis Laval, FR;
Marc Ferrigno, Billere, FR;
Assignee:
Elf Atochem S.A., Putueax, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 7/07 ; C07C / ;
U.S. Cl.
CPC ...
C01B 7/07 ; C07C / ;
Abstract
In order to remove the methanesulphonyl chloride entrained by the gaseous HCl by-product, an amount of water ranging from 0.01 to 20%, relative to the mass of HCl to be treated, is injected into the HCl gas flow and the temperature is lowered to a value below or equal to 15° C.