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:
Jun. 22, 2021
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;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 309/04 (2006.01); C07C 309/35 (2006.01); C07C 309/30 (2006.01); C07C 309/06 (2006.01); C07C 309/29 (2006.01); C07C 303/42 (2006.01); C23F 11/04 (2006.01); C23F 11/18 (2006.01);
U.S. Cl.
CPC ...
C07C 309/04 (2013.01); C07C 303/42 (2013.01); C07C 309/06 (2013.01); C07C 309/29 (2013.01); C07C 309/30 (2013.01); C07C 309/35 (2013.01); C23F 11/04 (2013.01); C23F 11/181 (2013.01);
Abstract
The subject of the present invention is a weakly corrosive and weakly coloured sulfonic acid, with an APHA colour index of less than 20, comprising chlorides and nitrites in a chloride/sulfonic acid molar ratio of between 1 ppm and 200 ppm, and a nitrite/sulfonic acid molar ratio of between 200 ppm and 6000 ppm, limits inclusive.