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:
Aug. 04, 2020
Filed:
Apr. 18, 2018
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Juergen Wortmann, Ludwigshafen, DE;
Jan Spielmann, Ludwigshafen, DE;
Katharina Federsel, Ludwigshafen, DE;
Feelly Ruether, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen am Rhein, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 303/44 (2006.01); C07C 303/06 (2006.01);
U.S. Cl.
CPC ...
C07C 303/44 (2013.01); C07C 303/06 (2013.01);
Abstract
A process for purifying alkanesulfonic anhydride that includes feeding a stream containing alkanesulfonic anhydride, sulfuric acid, high boilers and residual low boilers into a melt crystallization to form crystals of the alkanesulfonic anhydride suspended in mother liquor, and solid-liquid separation to remove the crystals from the mother liquor.