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:
Sep. 01, 1998
Filed:
Apr. 24, 1997
Applicant:
Inventors:
Jean Ollivier, Arudy, FR;
Annie Commarieu, Pau, FR;
Assignee:
Elf Atochem S.A., , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562828 ;
Abstract
The process for the purification of an alkanesulphonyl chloride (ASC) in order to reduce the sulphate content thereof consists in washing the alkanesulphonyl chloride with water or with an aqueous solution of an acid having a pH of between -0.57 and 7 and then in separating the alkanesulphonyl chloride thus purified from the aqueous phase. This purified ASC leads, by total hydrolysis, to alkanesulphonic acid with a low content of sulphuric acid.
Ollivier, Jean. (1998). Process for the purification of an alkanesulphonyl chloride and of the (U.S. Patent No. 5801283). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5801283
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