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:
May. 19, 2020
Filed:
Feb. 28, 2019
Applicant:
Arkema France, Colombes, FR;
Inventor:
Jean-Luc Dubois, Colombes, FR;
Assignee:
ARKEMA FRANCE, Colombes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 303/06 (2006.01); C07C 303/04 (2006.01); C07C 309/04 (2006.01);
U.S. Cl.
CPC ...
C07C 303/06 (2013.01); C07C 309/04 (2013.01);
Abstract
A process for the continuous industrial preparation of an alkane-sulphonic acid, from the corresponding alkane and sulphur trioxide, said process being carried out in a solvent which is the alkane-sulphonic acid. The process includes e1) addition of sulphur trioxide in order to maintain an initial molar ratio (alkanesulphonic acid)/(sulphur trioxide), addition of alkane in order to maintain a molar ratio (alkane)/(sulphur trioxide) comprised between 4/1 and 2/1, and continuous withdrawal of the alkanesulphonic acid.