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Process for the production of carbohydrate cleavage products from a lingnocellulosic material

  • US 9,970,038 B2
  • Filed: 04/30/2010
  • Issued: 05/15/2018
  • Est. Priority Date: 08/06/2009
  • Status: Active Grant
First Claim
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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.

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