Patent application number | Description | Published |
20110196161 | METHOD FOR PREPARING DIANHYDROHEXITOL DIESTER COMPOSITIONS - A method for preparing a dianhydrohexitol diester composition, characterized in that it comprises a step which consists in esterifying a dianhydrohexitol composition with a carboxylic acid in the presence of an acid catalyst and hypophosphorous acid. Preferably, the hypophosphorous acid is introduced in an amount ranging between 0.05 and 2 wt. % of dianhydrohexitol, and in a hypophosphorous acid/acid catalyst weight ratio less than 1/1. The method enables novel dianhydrohexitol diester compositions, for example isosorbide diesters, isomannide and/or isoidide richer in diester(s) and/or less coloured, useful in numerous industrial applications, in particular in plastic compositions, to be obtained. | 08-11-2011 |
20110233102 | USE OF A MATERIAL BASED ON A THERMOPLASTIC POLYMER HAVING A HIGH CONTENT OF ANTIOXIDANTS FOR PACKAGING DIANHYDROHEXITOLS - The present invention relates to the use of a packaging material based on a thermoplastic polymer for packaging a dianhydrohexitol, the packaging material comprising at least one thermoplastic polymer layer containing at least 0.1% by weight of at least one antioxidant (layer (A)), said layer (A) either being directly in contact with the dianhydrohexitol or being separated from the latter by a thermoplastic polymer layer (layer (B)) having a thickness at most equal to 150 μm, and the thermoplastic polymer of the layer (A) and/or of the layer (B) being chosen independently from polyethylene, polypropylene, ethylene/polypropylene copolymers and blends of the latter. | 09-29-2011 |
20120041169 | METHOD FOR PREPARING A DIALKYL CARBONATE OF DIANHYDROHEXITOL - 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. | 02-16-2012 |
20120116101 | METHOD FOR PREPARING DIAHYDROHEXITOL DIESTER COMPOSITIONS - A dianhydrohexitol diester composition is obtained by esterifying a dianhydrohexitol composition with a carboxylic acid in the presence of an acid catalyst and hypophosphorous acid. Preferably, the hypophosphorous acid is introduced in an amount between 0.05 and 2 wt. percent of dianhydrohexitol, and in a hypophosphorous acid/acid catalyst weight ratio of less than 1/1. Dianhydrohexitol diester compositions, for example isosorbide diesters, isomannide and/or isoidide rich in diester(s), and having a low yellow index (YI), are useful in numerous industrial applications, in particular in plastic compositions. | 05-10-2012 |
20120201951 | METHIONINE-RICH COMPOSITION FOR FEEDING ANIMALS - The present invention relates to a novel liquid or crystalline methionine composition, obtained by means of biomass bioconversion by means of microorganisms that are suitable for producing methionine. | 08-09-2012 |