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. 19, 2013
Filed:
Sep. 30, 2010
Patrick Fuertes, Lomme, FR;
Mathias Ibert, La Chapelle D'armentieres, FR;
Emilie Josien, St. Venant, FR;
Pietro Tundo, Mestre-venezia, IT;
Fabio Arico, Padova, IT;
Patrick Fuertes, Lomme, FR;
Mathias Ibert, La Chapelle D'armentieres, FR;
Emilie Josien, St. Venant, FR;
Pietro Tundo, Mestre-venezia, IT;
Fabio Arico, Padova, IT;
Roquette Freres, Lestrem, FR;
Abstract
A method for preparing dialkyl carbonates of dianhydrohexitol, includes the following steps: (a) preparing an initial reaction mixture containing at least one dianhydrohexitol, at least two mole equivalents of a dialkyl carbonate of formula and a transesterification catalyst; (b) heating the reaction mixture to a temperature greater than or equal to the boiling temperature of the formed alcohol, or of the azeotrope thereof, in a reaction chamber preferably provided with a rectification column including a sufficient number of theoretical distillation plates to separate the resulting alcohol from the reaction mixture. Certain dialkyl carbonates of dianhydrohexitols produced by the method and the use thereof for synthesizing synthetic polymers are also described.