Roquette Freres

Emilie Josien

Mathias Ibert

Herve Wyart

Patrick M Fuertes

Hervé Wyart

Fabio Arico

Pietro Tundo

Fabio AricÒ

The present invention relates to a process for packaging a dianhydrohexitol, in the form of an aqueous solution in a container comprising a metal-based layer. It also relates to the container containing the aqueous solution of dianhydrohexitol.

Process for packaging a dianhydrohexitol, aqueous solution of dianhydrohexitol packaged and uses thereof

A process for manufacturing a polycarbonate, having a glass transition temperature greater than or equal to 50&#xb0; C., includes: a step (1) of introducing into a reactor a monomer of formula (I) and R1 and R2 being identical or different alkyl groups; a step (2) of introducing into the reactor at least one cyclic diol or a mixture of diols (B) including at least 20 mol % of cyclic diols; a subsequent step (3) of polycondensation via transesterification of the mixture of monomers including the monomers (A) and (B); a step (4) of recovering the polycarbonate formed during step (3).

Process for manufacturing polycarbonate from dianhydrohexitol Dialkylcarbonate

A process for manufacturing polycarbonate includes:&#x2014;a step (1) of introducing into a reactor a particular composition (A) of at least one dianhydrohexitol carbonate bearing two alkyl carbonate functions; a step (2) of introducing a diol or a mixture of diols (B); a subsequent step (3) of polycondensation by transesterification of the mixture of monomers including (A) and (B); a step (4) of recovering the polycarbonate formed during step (3).

Process for manufacturing polycarbonate from derivatives of dianhydrohexitols bearing two alkyl carbonate functions

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.

Growing community of inventors

St Venant, France

Emilie Josien