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PREPARATION OF LACTIC ACID AND/OR A LACTATE SALT FROM LIGNOCELLULOSIC MATERIAL BY SEPARATE SACCHARIFICATION AND FERMENTATION STEPS

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  • Title:
    PREPARATION OF LACTIC ACID AND/OR A LACTATE SALT FROM LIGNOCELLULOSIC MATERIAL BY SEPARATE SACCHARIFICATION AND FERMENTATION STEPS
  • Author: SANCHEZ GARCIA, David ; BAETS, Peter Johannes Marie ; DE HAAN, André Banier ; GROOT, Willem Jacob
  • Subjects: APPARATUS THEREFOR ; PAPER-MAKING ; PRODUCTION OF CELLULOSE ; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS ; REGENERATION OF PULPING LIQUORS ; TEXTILES
  • Description: The present invention relates to a process for preparing lactic acid and/or a lactate salt via the fermentation of carbohydrates obtained from lignocellulosic material. In particular the process comprises: a) treating a lignocellulosic material with an alkaline agent comprising a caustic magnesium salt in the presence of water to provide a treated aqueous lignocellulosic material; b) saccharifying the treated aqueous lignocellulosic material in the presence of a hydrolytic enzyme to provide a saccharified aqueous lignocellulosic material comprising fermentable carbohydrates and a solid lignocellulosic fraction; c) fermenting the fermentable carbohydrates in the saccharified aqueous lignocellulosic material by means of lactic acid producing microorganism in the presence of an alkaline agent comprising a caustic magnesium salt to provide an aqueous fermentation broth comprising a magnesium lactate; and d) isolating lactic acid and/or lactate salt from the fermentation broth; wherein the saccharification step b) and the fermentation step c) are performed as two separate steps.
  • Creation Date: 2024
  • Language: English;French;German
  • Source: esp@cenet
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