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:
Jan. 14, 2020
Filed:
Mar. 16, 2017
Applicant:
Roquette Freres, Lestrem, FR;
Inventors:
Hervé Wyart, Cuinchy, FR;
Mathias Ibert, La Chapelle d'Armentières, FR;
Assignee:
ROQUETTE FRERES, Lestrem, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 493/04 (2006.01); B01D 1/22 (2006.01); B01D 3/14 (2006.01);
U.S. Cl.
CPC ...
C07D 493/04 (2013.01); B01D 1/22 (2013.01); B01D 3/14 (2013.01);
Abstract
A method for producing 1,4:3,6-dianhydrohexitols, including the steps of: a) supplying at least one hexitol, b) dehydrating the hexitol, and c) distillating the dehydration product produced in step b), wherein: the hexitol is supplied in the form of an aqueous solution in step a); and the distillation is carried out by means of a thin-film evaporator in step c).