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. 20, 2022
Filed:
Aug. 30, 2018
Applicant:
Arkema France, Colombes, FR;
Inventors:
Jean-Alex Laffitte, Biarritz, FR;
Bernard Monguillon, Nogent sur Marne, FR;
Assignee:
ARKEMA FRANCE, Colombes, FR;
Primary Examiner:
Int. Cl.
CPC ...
C07C 303/42 (2006.01);
U.S. Cl.
CPC ...
C07C 303/42 (2013.01); C07C 303/42 (2013.01); C07C 309/04 (2013.01);
Abstract
The subject of the present invention is a process for producing a sulfonic acid which is sparingly corrosive, or even non-corrosive, with respect to stainless steels, said process comprising at least the steps of adding at least one nitrite to a sulfonic acid, curing, with stirring, with sparging of the mixture and recovering the low-corrosion sulfonic acid obtained. The invention also relates to the low-corrosion sulfonic acid obtained according to the process of the invention, and also to the use thereof as low-corrosion sulfonic acid.