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:
Mar. 24, 2015
Filed:
Sep. 30, 2011
Applicants:
Georges Fremy, Sauveterre de Bearn, FR;
Jean-michel Raymond, Cauneille, FR;
Inventors:
Georges Fremy, Sauveterre de Bearn, FR;
Jean-Michel Raymond, Cauneille, FR;
Assignee:
Arkema France, Colombes Cedex, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 321/28 (2006.01); C07C 321/24 (2006.01); C07C 319/28 (2006.01); C07C 319/24 (2006.01);
U.S. Cl.
CPC ...
C07C 319/28 (2013.01); C07C 319/24 (2013.01);
Abstract
The present disclosure relates to a process for obtaining dialkyl disulphides from alkyl mercaptan and from sulphur, in which a reaction intermediate present in the final disulphide is decomposed at the end of synthesis. This operation makes it possible to avoid the degradation of said reaction intermediate over time, which is responsible for the decrease in purity of the dialkyl disulphide.