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. 30, 2017
Filed:
Oct. 22, 2014
Arkema France, Colombes, FR;
Jean-Benoit Cazaux, Billere, FR;
Delphine Ostorero, Sauvagnon, FR;
Arkema France, Colombes, FR;
Abstract
The invention relates to a method for synthesising a mercaptan from a terminal olefin and hydrogen sulphide which comprises the following consecutive steps: A—catalytic addition of hydrogen sulphide to a terminal olefin catalysed by an acid catalyst; B—separation of the products of the addition reaction into a light fraction including the surplus hydrogen sulphide and the olefins, and into a heavy fraction including at least one mercaptan and optionally one or more thioethers; C—a finishing step of passing the light fraction obtained in step B over an acid catalyst; then D—separation of the products of the finishing step into a fraction that is rich in hydrogen sulphide and into a fraction that is rich in additives; and finally E—recirculation of the fraction that is rich in hydrogen sulphide to the catalytic addition step A. The invention also relates to the facility for implementing said method.