Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to soluble highly branched glucose polymers, having a reducing sugar content of less than 1%, a level of ?-1,6 glucoside bonds of between 13 and 17% and an Mw having a value of between 0.9×105 and 1.5×105 daltons, 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to soluble hydrogenated starch derivatives containing nondigestible dietary fibre, 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.

Abstract: The subject of the present invention is a novel method for preparing a composition of internal dehydration product of a hydrogenated sugar, comprising:

Abstract: 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° C. and 170° 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.

Abstract: The invention concerns a method for preparing a lactic acid ester composition based on a lactic acid composition comprising a step which consists in transforming said composition into a lactic acid oligomeric composition having a mean degree of polymerisation (DPM) ranging between 2 and 30 approximately; a step which consists in 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.

Abstract: 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.

Abstract: The invention relates to a process for the conversion of starchy substances including a chemical liquification stage and a stabilization stage, whether simultaneous or not, these two stages being carried out in the dry phase and using respectively: a mineral or organic acid, permitting the liquification of the starchy substance at a water fluidity valued (WF) of at least 10, preferably at least 45, and an aldehyde compound, in particular a condensate between an aldehyde and a nitrogenous compound, capable of stabilizing said starchy substance.

Abstract: A chemical fluidification process for a starchy material, which is carried out in a reactor suitable for continuous operation and with a humidity of the reaction mix (starch included) of less thank 25%, which consists in subjecting a starchy material to the hydrolyzing action of a chemical agent. The dwell time of the starchy material in the fluidification reactor is more than 5 minutes and less than 30 minutes. The temperature at the core of said reactor is more than 60° C. and less than 100° C. approximately, a conversion process comprising said chemical fluidification, and starchy materials obtainable by such processes.

Abstract: The invention relates to an diluent and disintegrating composition characterised in that it contains an effective proportion of particles of highly crosslinked starch with limited swelling, enclosed in a matrix of pregelatinised starch.

Abstract: 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.

Abstract: The invention relates to a novel pulverulent hydroxypropyl-.beta.-cyclodextrin compound having a centered particle size free of fine particles and an appreciably improved capacity to dissolve in aqueous medium. The compound also has good flowability and has the advantage of being compressible. The invention also relates to a process for the preparation of this pulverulent hydroxypropyl-.beta.-cyclodextrin compound.

Abstract: The invention relates to a new composition for sizing paper and board, containing a cationic polysaccharide esterified by a dicarboxylic acid anhydride, characterized in that the said dicarboxylic acid anhydride is substituted with a carbon chain, saturated or unsaturated, of branched structure.The anhydride may for example consist of tetrapropenylsuccinic anhydride or of any one of its isomers.The composition for sizing according to the invention may, if necessary, contain an oxidizing agent such as a persulphate. It may advantageously be applied to the surface treatment of printing and/or writing papers, in particular of papers for envelopes and of papers for impact-free printing such as inkjet printing.

Abstract: The invention relates to a new composition for sizing paper and board, containing a cationic polysaccharide esterified by a dicarboxylic acid anhydride, characterized in that the said dicarboxylic acid anhydride is substituted with a carbon chain, saturated or unsaturated, of branched structure. The anhydride may for example consist of tetrapropenylsuccinic anhydride or of any one of its isomers. The composition for sizing according to the invention may, if necessary, contain an oxidizing agent such as a persulphate. It may advantageously be applied to the surface treatment of printing and/or writing papers, in particular of papers for envelopes and of papers for impact-free printing such as inkjet printing.

Abstract: The invention has as its object a process for the ionic exchange of ionised starches, consisting of washing the ionised starch which is in the form of a granular solid by means of a solution containing one or more exchange ions capable of replacing the counter-ions present on the starch.

Abstract: Process for the oxidation of aldoses and particularly of glucose into the corresponding aldonic acids, wherein oxidation is carried out in an alkaline medium by means of an oxygen-containing gas, in the presence of a catalyst obtained by adding an efficient quantity of at least one of the metals constituting the Groups IV, V and VI, or promoter, onto a catalyst consisting of palladium on an inert support.