Roquette Freres

Other

Evonik Degussa Gmbh

Patrick M Fuertes

Michel Serpelloni

Etienne Fleury

Guy M Fleche

Anne Lambin

Jean-Louis Dreux

Hervé Wyart

Rodolphe Tamion

Mathias Ibert

Herve Wyart

Carole Petitjean

Catherine Fouache

Serge Comini

Jean-Michel Roturier

Emilie Josien

Arnaud Verraes

Thierry Feron

Fabio Arico

Didier Moine

Bruno Vappereau

Anne Lambin Delmotte

Anne Lambin Nee DelMotte

Maxime Ingret

Jean-Louis Druex

Pietro Tundo

Juliette Brocard

Catherine Baurain

Julien Bernard

Fabio AricÒ

Eric Drockenmuller

Céline Besset

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.

Methionine-rich composition for feeding animals

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.

Method for stabilizing a composition containing at least one product of internal dehydration of a hydrogenated sugar, resulting composition and uses thereof

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.

Method for preparing diahydrohexitol diester compositions

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.

Method for preparing a dialkyl carbonate of dianhydrohexitol

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 &#x3bc;m, 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.

Use of a material based on a thermoplastic polymer having a high content of antioxidants for packaging dianhydrohexitols

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 colored, useful in numerous industrial applications, in particular in plastic compositions, to be obtained.

Method for preparing dianhydrohexitol diester compositions

The subject of the present invention is a novel method for preparing a composition of internal dehydration product of a hydrogenated sugar, comprising: This method makes it possible in particular to obtain a stable isosorbide composition, characterized by its purity and/or its content of certain stabilizing or nonstabilizing species.

Method for preparing a composition containing at least one internal dehydration product for a hydrogenated sugar

Method for preparing highly pure L-iditol, consisting in subjecting a mixture of L-iditol and of L-sorbose to a chromatographic treatment, in such a way as to obtain at least two fractions, one of which is highly enriched in L-iditol and the other of which is highly enriched in L-sorbose.

Method for preparing L-iditol

The invention relates to soluble highly branched glucose polymers, having a reducing sugar content of less than 1%, a level of &#x3b1;-1,6 glucoside bonds of between 13 and 17% and an Mw having a value of between 0.9&#xd7;10and 1.5&#xd7;10daltons, characterized in that their branched chain length distribution profile consists of 70 to 85% of DP of less than 15, of 10 to 16% of DP of between 15 and 25 and of 8 to 13% of DP greater than 25.

Soluble highly branched glucose polymers

The invention relates to soluble hydrogenated starch derivatives containing nondigestible dietary fiber, characterized in that they have an ICUMSA coloration value reduced by at least 50%, and a reducing sugar content reduced by at least 30%, and to their method of preparation.

Soluble hydrogenated starch derivatives containing nondigestible dietary fibres

The invention concerns a method for preparing a lactic acid ester composition based on a lactic acid composition involving a step of transforming the composition into a lactic acid oligomeric composition having a mean degree of polymerisation (DPM) ranging between 2 and 30 approximately; and a step which involves mixing and reacting said oligomeric composition with an alcohol, in the presence of a transesterification catalyst, to esterify all or part of the lactic acid contained in said oligomeric composition. The invention also concerns the use of ethyl lactate as solvent for preparing gelified compositions.

Method for preparing a lactic acid ester composition and use thereof as solvent

The invention concerns a method for purifying a composition containing at least a product for internal dehydration of a hydrogenated sugar. The invention is characterised in that it comprises: (a) an optional step whereby said composition is treated, whether after re-dissolving or not, with at least a discoloration means; (b) a subsequent step whereby the composition, optionally treated with discoloration means, is treated with at least ion-exchanging means; (c) a subsequent step whereby the resulting composition is treated with at least discoloration means. Said method is in particular applicable to isohexide compositions, in particular isosorbide or isomannide. The resulting compositions, which exhibit particular characteristics in terms of purity and proportion of some impurities, constitute novel products for use in chemical, pharmaceutical, cosmetology and food industries.

Method for purifying a composition containing at least one internal dehydration product of a hydrogenated sugar

The subject of the invention is a process for modifying starch or starch derivatives by branching enzymes, consisting in continuously introducing the said branching enzymes into the reaction medium containing starch or starch derivatives.

Continuous process for modifying starch and its derivatives by branching enzymes

The subject of the invention is a process for modifying amylaceous (starchy) materials comprising a stage of chemical fluidification and a stage of stabilization, simultaneous or not simultaneous, these two stages being performed in the dry phase and by the use of a plycarboxylic organic acid. The acid can be chosen particularly from among citric acid, adipic acid, azelaic acid and their mixtures. The process is advantageously performed at a temperature between 90&deg; C. and 170&deg; C., at a pH below 4 and during a total period between 3 minutes and 8 hours. The starchy material subjected to fluidification and stabilization can be cationic.

Process for modifying starchy materials in the dry phase

A process for the conversion of an organic material comprising an oxidation step during which an organic material undergoes the oxidising action of an enzymatic means capable of generating hydrogen peroxide, wherein said oxidation step is carried out, wholly or partly, in the presence of 0.001% to 1% of a metal selected from ruthenium, palladium and mixtures thereof.

Process for the conversion of organic materials, particularly saccharide materials, comprising an enzymatic oxidation step in the presence of ruthenium or palladium

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Lille, France

Patrick M Fuertes