Process for the production of carbohydrate cleavage products from a lingnocellulosic material
First Claim
Patent Images
1. A process for the production of xylitol, the process comprising:
- treating a lignocellulosic material with an aqueous solution containing an alcohol and having a pH-value of between 11.0 and 14.0, in order to cleave lignocellulose and separate cleavage products from said lignocellulosic material, whereby a material enriched with cellulose and hemicellulose is obtained, andtreating said obtained material enriched with cellulose and hemicellulose with a xylanase in order to obtain a xylose solution and solid;
converting said xylose solution to xylitol by enzymatic conversion without fermentation, wherein NAD(P)H as a cofactor, a cosubstrate for the regeneration of said cofactor, and an alcohol dehydrogenase are added to said xylose.
1 Assignment
0 Petitions
Accused Products
Abstract
A process for the production of carbohydrate cleavage products, characterized by a combination of the measures that a lignocellulosic material is treated with an aqueous solution containing an alcohol, in particular a C1-4-alcohol or a phenol, and having a pH-value of between 11.0 and 14.0 in order to cleave lignocellulose and separate cleavage products from the material, whereby a material enriched with cellulose and hemicellulose is obtained, and the obtained material enriched with cellulose and hemicellulose is treated with at least one carbohydrate-cleaving enzyme in order to obtain the carbohydrate cleavage products.
-
Citations
19 Claims
-
1. A process for the production of xylitol, the process comprising:
-
treating a lignocellulosic material with an aqueous solution containing an alcohol and having a pH-value of between 11.0 and 14.0, in order to cleave lignocellulose and separate cleavage products from said lignocellulosic material, whereby a material enriched with cellulose and hemicellulose is obtained, and treating said obtained material enriched with cellulose and hemicellulose with a xylanase in order to obtain a xylose solution and solid; converting said xylose solution to xylitol by enzymatic conversion without fermentation, wherein NAD(P)H as a cofactor, a cosubstrate for the regeneration of said cofactor, and an alcohol dehydrogenase are added to said xylose. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification