METHOD FOR PRE-TREATING LIGNOCELLULOSIC BIOMASS BY MEANS OF HIGH-PRESSURE CHEMICAL OXIDATION

• Main Authors: DIAZ SANCHEZ, ANA BELEN, BLANDINO GARRIDO, ANA MARIA, CARO PINA, ILDEFONSO, ORY ARRIAGA, IGNACIO DE
• Format: Patent
• Language: English; French; Spanish
• Published: 08.05.2014
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SPIRITS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; VINEGAR; WINE

The invention relates to a method for pre-treating lignocellulosic biomass by means of high-pressure chemical oxidation. This method combines the action of alkaline hydrogen peroxide with high pressure in a single step. Said method is used to partially delignify the substrates, improving the accessibility thereof to enzymatic attack for producing fermentable sugars, obtaining hydrolysis yields close to 100%. Procedimiento para pretratar biomasa lignocelulósica mediante oxidación química a alta presión. Este procedimiento combina en una sola etapa la acción del peróxido de hidrógeno alcalino con una alta presión. Con este procedimiento los sustratos son parcialmente delignificados, mejorando su accesibilidad al ataque enzimático para producir azúcares fermentables, consiguiéndose rendimientos de hidrólisis próximos al 100%. L'invention concerne un procédé pour prétraiter la biomasse lignocellulosique par oxydation chimique à haute pression. Ce procédé combine en une seule étape l'action du peroxyde d'hydrogène alcalin à une haute pression. Avec ce procédé, les substrats sont partiellement délignifiés, ce qui améliore ainsi leur accessibilité à l'attaque enzymatique pour produire des sucres fermentescibles, des rendements d'hydrolyse proches de 100% étant ainsi obtenus.