A wood-derived carbohydrate composition
AssigneeUpm-Kymmene Corporation
InventorsJuha Tamper, Jere Salminen, Meri Ventola, Barbara Gall
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Abstract
A wood-derived carbohydrate composition is disclosed. The wood-derived carbohydrate composition comprises monomeric C6 sugars and monomeric C5 in a total amount of at least 94 weight-% based on the total dry matter content of the carbohydrate composition, wherein the weight ratio of the monomeric C5 sugars to the monomeric C6 sugars is at most 0.1. Disclosed is also a method for producing a wood-derived carbohydrate composition.
Claims32
A wood-derived carbohydrate composition comprising monomeric C6 sugars and monomeric C5 sugars in a total amount of at least 94 weight-% based on the total dry matter content of the carbohydrate composition, wherein the weight ratio of the monomeric C5 sugars to the monomeric C6 sugars is at most 0.1.
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 a 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-%;
- 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;
- and
- vi) subjecting the recovered liquid carbohydrate fraction to purification treatment to form a wood-derived carbohydrate composition.
Dependencies are inferred from the claim text.