METHODS AND SYSTEMS FOR PRODUCTION OF SUGARS FROM CARBOHYDRATE-RICH SUBSTRATES Russian patent published in 2016 - IPC C08B37/00 

FIELD: chemistry.

SUBSTANCE: method comprises providing carbohydrate-rich substrate and aqueous solution with hydrolysis catalyst. Evacuation pressure is maintained above substrate for introduction of hydrolysis catalyst into carbohydrate-rich substrate to produce reaction mixture. Said reaction mixture is exposed to high pressure of gas phase at step of hydrolysis reaction, reaction mixture is held to produce monomers and/or polymers of sugars in open space inside fibres of substrate. Reaction mixture is exposed to pressure of gas phase, which is lower than pressure of hydrolysis reaction, for removing said monomers and/or polymers of sugars from said open space inside fibres of substrate into said aqueous solution and held. Steps of hydrolysis and extraction are repeated in at least two cycles of changing pressure to extract maximum amount of monomers and/or polymers of sugars from open space inside fibres of substrate. Monomers and/or polymers of sugars are then separated from aqueous solution. Method does not include treatment with water vapour or breakdown with ammonia of fibres of carbohydrate-rich substrate.

EFFECT: invention simplifies method of extracting sugars from carbohydrate-rich substrates.

25 cl, 1 dwg, 5 tbl, 7 ex