Abstract:
The present invention refers to a process for the purification of levulinic acid, an aqueous solution comprising levulinic acid and a process for the production of levulinic acid.
Abstract:
L'invention concerne un procédé de préparation d'un composé (I) ou d'un de ses sels, et les applications de ce procédé, R 1 OOC-C(=X)-CHR 2 R 3 (I) Où X est choisi parmi O; N-R' où R' représente H ou un alkyle en C1-C6; et N-OR'' où R'' représente H, un en C1-C6 ou un alkylaryle; R 1 représente H ou un groupe alkyle en C1-C6; R 2 représente H, un alkyle en C1-C6, ou un alkylaryle; et R 3 représente CH 2 SR 4 ou CH 2 SeR 4 avec R 4 représente H ou un alkyle en C1-C6 à partir d'un composé (II), ou d'un de ses sels, R 1 OOC-C(=X)-CHR 2 R 5 et R 5 représente H ou COOR 6 avec R 6 représente H ou un alkyle en C1- C6, ledit procédé étant réalisé en présence d'un composé (III) CH 2 (Y)(Z). Où Y représente H; OR 7 avec R 7 représente H, un alkyle en C1-C6 ou un acyle de formule CO-R 4 ;SR 4 ou SeR 4 avec R 4 répondant à la définition précédente; ou 1 NR 8 R 9 , avec R 8 et R 9 , identiques ou différents, représentent, chacun ou ensemble, un alkyle en C1-C6, ou un alkylaryle; Z, identique ou différent de Y, représente OR 10 avec R 10 représente H, un alkyle en C1-C6 CO-R 4 ; un groupe N(COR 4 )(COR 4 ), cyclique ou acyclique;ou NR 11 R 12 , avec R 11 et R 12 , identiques ou différents, représentent, chacun ou ensemble, un alkyle en C1-C6, ou un alkylaryle; Ou Y et Z représentent ensemble =O; Ledit procédé impliquant un intermédiaire (IV) R 1 OOC-C(=X)-CHR 2 -CH 2 Z.
Abstract:
The invention is directed to a process for the isolation of levulinic acid obtained by acid catalyzed hydrolysis of a C6-carbohydrate-containing feedstock, comprising the following steps: a) Providing a solution 1 comprising at least 5 wt% of levulinic acid, at least 0.1 wt% of formic acid and at most 94.9 wt% of solvent, relative to the total weight of solution 1 b) Feeding solution 1 to a first evaporation step to treat solution 1 and to obtain solution 2, comprising at least 25 wt% of levulinic acid, less than 20 wt% of solvent and at least 1 wt% of formic acid, relative to the total weight of solution 2, c) Feeding solution 2 to a second evaporation step to treat solution 2 and to obtain solution 3, comprising at least 30 wt% of levulinic acid and less than 1.0 wt% of formic acid, relative to the total weight of solution 3, d) Feeding solution 3 to a third evaporation step to treat solution 3 and to obtain levulinic acid with a purity of at least 90 wt% and containing less than 1000 wppm angelica lactone.
Abstract:
The invention describes processes to selectively remove or reduce the mineral acid content substantially from compositions comprising a solvent and levulinic acid, wherein the levulinic acid was derived from the reaction between various biomass materials and a mineral acid or an organic acid catalyst.
Abstract:
A method of modifying the taste of a consumable, comprising adding to a consumable base at least one compound of the formula I in which (a) A is selected from the moieties (i) or (ii); (b) n is from 0-7, such that X is absent or a linear alkylene group in which n is from 1-7; and (c) Z is absent and Y is a moiety selected from the groups -CHO, or -CH2OH; or (d) Z is present and is a C1-7 linear alkane, and Y is selected from -CHOH, -CO, or -COC(CH3)O. The result is a consumable with enhanced mouthfeel and/or creaminess.
Abstract:
A method to produce levulinic acid (LA) and γ-valerolactone (GVL) from biomass-derived cellulose by selective extraction of LA by alkylphenol (AP) and hydrogenation of LA, in which mineral acid used in the method is recycled and the final concentration of GVL is increased by successive extraction/hydrogenation steps to allow for effective separation by distillation.
Abstract:
This present invention relates to an organosolv process for the extraction of materials from lignocellulosic biomass. This invention further relates to the chemicals and their derivatives extracted from biomass, uses, apparatus, methods, and the like. In an embodiment of the invention the material extracted from the lignocellulosic biomass is levulinic acid.
Abstract:
A process for the conversion of furfuryl alcohol into levulinate esters in a single step reaction comprising addition of the product levulinate ester to the reaction mixture of an alkanol and furfuryl alcohol in the presence of a strong protic acid catalyst, wherein high yield of the levulinate ester is accompanied by low amounts of tarry residue that do not precipitate or solidify in the reaction mixture.