Abstract: The use of a product for internal dehydration of hydrogenated sugar as a methanogen substrate in a method for biogas production, a composition including a monoanhydrohexitol (M), a dianhydrohexitol (D), and anhydrohexitol polymers (P), and a methanisation method.

Abstract: A method for producing a composition of diesters, includes a step including the esterification of 1,4:3,6-dianhydrohexitol by a composition of carboxylic acids, the composition including: at least an acid having formula C7H15COOH (X) and an acid having formula C9H19COOH (Y), the mass ratio (X)/(Y) varying between 10/90 and 90/10.

Abstract: Disclosed is a composition that can rapidly plasticize polymers, including, in relation to the total mass of (A) and (B): between 0.1 and 99 mass-% of at least one ester of 1,4:3,6-dianhydrohexitol (A), having a molar mass varying between 255 and 345 g·mol?1 and selected from among monoesters and diesters of isosorbide, isomannide and isoidide; and between 1 and 99.9 mass-% of at least one compound (B) having a molar mass greater than 345 g·mol?1 and selected from among the esters of 1,4:3,6-dianhydrohexitol, the esters of cyclohexane polycarboxylic acid, the esters of phthalic acid, and glycerol esters. Also disclosed is a method for the production of a plasticized object using constituents (A) and (B), as well as to the use of the ester compound (A) as a polymer gelification accelerator.

Abstract: The use of a product for internal dehydration of hydrogenated sugar as a methanogen substrate in a method for biogas production, a composition including a monoanhydrohexitol (M), a dianhydrohexitol (D), and anhydrohexitol polymers (P), and a methanisation method.

Abstract: A method for improving the stability of compositions of a product for internal dehydration of a hydrogenated sugar, in particular an isosorbide composition, the method involving the use of monoethanolamine, diethanolamine, triethanolamine and the mixtures thereof as a stabilization agent. The resulting compositions and their various uses thereof are also described.

Abstract: A simple, low cost, environmentally friendly and sustainable process for the production of internal dehydration products of hydrogenated sugar, implementing trivalent metal phosphate (metal (III) phosphates) as catalysts during the dehydratation step.

Abstract: Dianhydrohexitol pellets, whose fluidity is preserved even after lengthy storage, include between 90% and 100%, preferably between 95% and 100%, and more preferentially between 97% and 100% of dianhydrohexitols by weight, on a dry weight basis, and have the particularity of not being subject to caking. A process for preparing the dianhydrohexitol pellets is also described.

Abstract: A method for improving the stability of compositions of a product for internal dehydration of a hydrogenated sugar, in particular an isosorbide composition, the method involving the use of monoethanolamine, diethanolamine, triethanolamine and the mixtures thereof as a stabilization agent. The resulting compositions and their various uses thereof are also described.

Abstract: Dianhydrohexitol pellets, whose fluidity is preserved even after lengthy storage, include between 90% and 100%, preferably between 95% and 100%, and more preferentially between 97% and 100% of dianhydrohexitols by weight, on a dry weight basis, and have the particularity of not being subject to caking. A process for preparing the dianhydrohexitol pellets is also described.

Abstract: A method for producing a composition of diesters, includes a step including the esterification of 1,4: 3,6-dianhydrohexitol by a composition of carboxylic acids, the composition including: at least an acid having formula C7H15COOH (X) and an acid having formula C9H19COOH (Y), the mass ratio (X)/(Y) varying between 10/90 à 90/10.

Abstract: Dianhydrohexitol pellets, whose fluidity is preserved even after lengthy storage, include between 90% and 100%, preferably between 95% and 100%, and more preferentially between 97% and 100% of dianhydrohexitols by weight, on a dry weight basis, and have the particularity of not being subject to caking. A process for preparing the dianhydrohexitol pellets is also described.

Abstract: A method for producing a composition of diesters of 1,4:3,6-dianhydrohexitol, characterised in that it includes a step including the esterification of 1,4:3,6-dianhydrohexitol by a composition of carboxylic acids, the composition of carboxylic acids including: at least an acid having formula C7H15COOH (X) and an acid having formula C9H19COOH (Y), the mass ratio (X)/(Y) varying between 10/90 à 90/10; at least one acid having a formula different from (X) and (Y), selected from among hexanoic acid, lauric acid, myristic acid, oleic acid or linoleic acid.

Abstract: A simple, low cost, environmentally friendly and sustainable process for the production of internal dehydration products of hydrogenated sugar, implementing trivalent metal phosphate (metal (III) phosphates) as catalysts during the dehydratation step.

Abstract: A process for manufacturing a polycarbonate, having a glass transition temperature greater than or equal to 50° 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).

Abstract: Disclosed is a composition that can rapidly plasticise polymers, including, in relation to the total mass of (A) and (B): between 0.1 and 99 mass-% of at least one ester of 1,4:3,6-dianhydrohexitol (A), having a molar mass varying between 255 and 345 g·mol?1 and selected from among monoesters and diesters of isosorbide, isomannide and isoidide; and between 1 and 99.9 mass-% of at least one compound (B) having a molar mass greater than 345 g·mol?1 and selected from among the esters of 1,4:3,6-dianhydrohexitol, the esters of cyclohexane polycarboxylic acid, the esters of phthalic acid, and glycerol esters. Also disclosed is a method for the production of a plasticised object using constituents (A) and (B), as well as to the use of the ester compound (A) as a polymer gelification accelerator.

Abstract: A process for manufacturing polycarbonate includes:—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).

Abstract: A dianhydrohexitol packaged in a packaging material that is impervious to gas, wherein the partial pressure of oxygen inside the packaging is 0.1 to 10 mbar, preferably 0.5 to 5 mbar, and more preferably 0.5 to 2 mbar. The method for packaging dianhydrohexitol, includes inserting the dianhydrohexitol into a packaging material that is impervious to gas, and then hermetically sealing the packaging, the method being carried out in an atmosphere that has a partial pressure of oxygen of 0.1 to 10 mbar, preferably 0.5 to 5 mbar, and more preferably 0.5 to 2 mbar.

Abstract: A process for manufacturing a polycarbonate, having a glass transition temperature greater than or equal to 50° 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).

Abstract: A process for manufacturing polycarbonate includes:—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).

Abstract: Dianhydrohexitol pellets, whose fluidity is preserved even after lengthy storage, include between 90% and 100%, preferably between 95% and 100%, and more preferentially between 97% and 100% of dianhydrohexitols by weight, on a dry weight basis, and have the particularity of not being subject to caking. A process for preparing the dianhydrohexitol pellets is also described.