A wood-derived carbohydrate composition
AssigneeUpm-Kymmene Corporation
InventorsJuha Tamper, Jere Salminen, Meri Ventola
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Abstract
A wood-derived carbohydrate composition is disclosed. The wood-derived carbohydrate composition comprises monomeric C6 sugars and monomeric C5 sugars in a total amount of at least 80 weight-% based on the total dry matter content of the carbohydrate composition. The ratio of the monomeric C5 sugars to the monomeric C6 sugars is at most 0.15. Disclosed is also a method for producing a wood-derived carbohydrate composition.
Claims24
A wood-derived carbohydrate composition comprising monomeric C6 sugars and monomeric C5 sugars in a total amount of at least 80 weight-% based on the total dry matter content of the carbohydrate composition, wherein the ratio of the monomeric C5 sugars to the monomeric C6 sugars is at most 0.15.
A method for producing a wood-derived carbohydrate composition, wherein the method comprises:
- i) providing a wood-based feedstock originating from wood-based raw material and comprising wood chips, and subjecting the wood-based feedstock to pretreatment to form a slurry;
- ii) separating the slurry into a liquid fraction and a fraction comprising solid cellulose particles by a first solid-liquid separation process to form a fraction comprising solid cellulose particles having a total dry matter content of 15-50 weight-%, wherein the first solid-liquid separation process comprises washing the fraction comprising solid cellulose particles until the amount of soluble organic components in the fraction comprising solid cellulose particles is 0.5-5 weight-% based on the total dry matter content;
- iii) optionally, diluting the separated fraction comprising solid cellulose particles to a total dry matter content of 8-20 weight-%;
- iv) subjecting the fraction comprising solid cellulose particles to enzymatic hydrolysis to form a hydrolysis product, wherein the fraction comprising solid cellulose particles has a total dry matter content of 8-20 weight-%;
- and
- v) separating the hydrolysis product into a solid fraction comprising lignin and a liquid carbohydrate fraction by a second solid-liquid separation process to recover the liquid carbohydrate fraction as a wood-derived carbohydrate composition.
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Dependencies are inferred from the claim text.