Methods for the production of 2,4-dihydroxybutyrate (2,4-DHB) from erythrose and other four-carbon sugars are disclosed. The improved methods facilitate the production of 2,4-DHB that is a precursor for biorenewable and animal nutrition chemicals among others.
C07C 51/00 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides
C07C 51/16 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par oxydation
C07C 51/377 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par des réactions ne créant pas de groupes carboxyle par élimination d'hydrogène ou de groupes fonctionnelsPréparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par des réactions ne créant pas de groupes carboxyle par hydrogénolyse de groupes fonctionnels
2.
METHOD FOR THE PRODUCTION OF 2,4-DIHYDROXYBUTYRIC ACID
Methods for the production of 2,4-dihydroxybutyrate (2,4-DHB) from erythrose and other four-carbon sugars are disclosed. The improved methods facilitate the production of 2,4-DHB that is a precursor for biorenewable and animal nutrition chemicals among others.
C07C 51/16 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par oxydation
C07C 51/377 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par des réactions ne créant pas de groupes carboxyle par élimination d'hydrogène ou de groupes fonctionnelsPréparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par des réactions ne créant pas de groupes carboxyle par hydrogénolyse de groupes fonctionnels
3.
METHODS FOR THE SIMULTANEOUS ELECTROLYTIC DECARBOXYLATION AND REDUCTION OF SUGARS
Methods for simultaneously decarboxylating carbohydrate acids and reducing carbohydrate aldehydes in a divided electrochemical cell having a central compartment separate from the anode and cathode are disclosed using a cation membrane and a bipolar membrane. The improved methods are more cost-efficient and environmentally friendly.
Methods for decarboxylating carbohydrate acids in a divided electrochemical cell are disclosed using a cation membrane. The improved methods are more cost- efficient and environmentally friendly than conventional methods.
C25B 3/02 - Production électrolytique de composés organiques par oxydation
C25B 3/00 - Production électrolytique de composés organiques
C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
5.
METHODS FOR THE ELECTROLYTIC PRODUCTION OF ERYTHRITOL
Methods for the production of erythrose and/or erythritol are provided herein. Preferably, the method of producing erythritol includes the step of electrolytic decarboxylation of a ribonic acid or arabinonic acid reactant to produce erythrose and the step of electrolytic reduction or erythrose to produce erythritol. Optionally, the reactant can be obtained from a suitable hexose sugar, such as allose, altrose, glucose, fructose or mannose.
Method and electrochemical cells for producing xylo-pent-1,5-diose are provided. The xylo-pent-1,5-diose may be formed in a solution initially comprising D-glucuronic acid or D-glucuronic acid glycoside. The xylo-pent-1,5-diose may be formed by electrochemical oxidative decarboxylation of the D-glucuronic acid or D-glucuronic acid glycoside in the solution in the presence of a graphite foil electrode with improved current efficiency and/or current density.
C25B 3/00 - Production électrolytique de composés organiques
C25B 9/00 - Cellules ou assemblages de cellulesÉléments de structure des cellulesAssemblages d'éléments de structure, p. ex. assemblages d'électrode-diaphragmeCaractéristiques des cellules relatives aux procédés
7.
COMPOSITIONS AND PROCESSES FOR THE SELECTIVE CATALYTIC OXIDATION OF ALCOHOLS
Processes for oxidation of primary alcohols or aldehydes into the corresponding carboxylic acids are provided herein, including processes for the aerobic catalytic oxidation of a hydroxyl moiety pendant to a cyclic carbohydrate to a carboxylic acid in a manner that preserves the cyclic carbohydrate structure. The oxidation processes may be performed in the absence of a transition metal catalyst, halogenated solvent and a hypochlorite reagent. The processes and compositions with and without a bromide source are provided. A liquid reaction media comprising a carboxylic acid and a catalyst composition comprising a nitroxyl radical and a nitrogen-containing co-catalyst selected from a nitrate source, a nitric oxide derivative and a nitrogen dioxide derivative, may.be combined with the reactant alcohol substrate to form a reaction media which can be pressurized at constant volume with an oxygen-containing gas under conditions of temperature and constant pressure within a reaction vessel to selectively oxidize the reactant substrate to form a carboxylic acid product. Preferably, the reactant alcohol substrate is a cyclic carbohydrate having a pendant primary or secondary alcohol that is converted to a carboxylic acid by the selective oxidation process, such as the conversion of an alkyl-glucopyranoside to a corresponding alkyl-glucuronic acid.
C07B 41/08 - Formation ou introduction de groupes fonctionnels contenant de l'oxygène de groupes carboxyle ou de leurs sels, halogénures ou anhydrides
C07C 51/235 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides par oxydation avec l'oxygène moléculaire de groupes contenant de l'oxygène en groupes carboxyle de groupes —CHO ou de groupes alcool primaire
Methods for the production of erythrose and/or erythritol are provided herein. Preferably, the methods include the step of electrolytic decarboxylation of a ribonic acid or arabinonic acid reactant to produce erythrose. Optionally, the reactant can be obtained from a suitable hexose sugar, such as allose, altrose, glucose, fructose or mannose. The erythrose product can be hydrogenated to produce erythritol.
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