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:
Feb. 04, 2020
Filed:
Jun. 29, 2015
Arkema France, Colombes, FR;
Georges Fremy, Sauveterre-de-Bearn, FR;
Patrice Barre, Lons, FR;
Jean-Michel Raymond, Cauneille, FR;
Arkema France, Colombes, FR;
Abstract
The present invention relates to a method for preparing dimethyl disulphide, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (HS) and optionally sulphur (S) such as to form carbon disulphide (CS) and hydrogen (H); b) reacting said carbon disulphide (CS) by hydrogenation in the presence of said hydrogen (H) obtained in step a), such as to form methyl mercaptan (CHSH), hydrogen sulphide (HS) and optionally hydrogen (H); c) optionally, but preferably, recirculating said hydrogen sulphide (HS) formed in step b) to step a); d) reacting the methyl mercaptan formed in step b) with sulphur such as to form dimethyl disulphide and hydrogen sulphide; e) optionally recirculating the hydrogen sulphide formed during step d) to step a); and f) recovering the dimethyl disulphide.