TH6953B - Method for producing alcohol from sugar xylose - Google Patents

Abstract

Invent this karma Focus on the method used for production. The silitol is very pure. From the silos solution Which may contain hexolase, for example Glucose plus other additives Included in this method is to ferment the solution with a strain of yeast, which can change Almost all such independent silos. To be a silitol And change most of the tears The free Heroses said almost all. To be a silitol And replace most of the sugar The aforementioned free herosase is ethanol, the fermented product is purified. By removing yeast cells from the solution With filtration, centrifugation or other convenient methods And suitable for the ethanol part Will be removed by evaporation or distillation. Separation using chromatography resulted in the extraction of the high xylitol content. Or the part that can separate pure xylitol crystals

Claims (8)

1. Method for the production of xylitol from aqueous solution with xylose And another free hexose containing the process of: fermenting aqueous solution of the aqueous xylose with a yeast strain capable of converting the existing free xylose to xylitol, and free hexose. Contained in the aforementioned solution is ethanol, for a period of time sufficient to produce a silt-containing fermentation solution; Make separate sections filled with solitol. By separating the chromatography from the aforementioned fermentation solution, the xylitol was recovered from it. 2. Method of claim 1 of the yeast family is cantida. Or Debario Moses 3. Method of claim 2 in which yeast strains are cantidatropicalis 4. Method of claim 3 in which yeast strains are Cantida Tropicalis with American Type CultureCollection Accession Number9968 5. Method of claim 2 in which yeast strains are Debaryomizes Hancini 6. Method of claim 1 in which the aforementioned solitol is brought back from the filled part of the said silit by crystallization 7. Method of Claim 1 where fermentation was performed at approximately 30 ° C for approximately 48 hours. 8. Method of claim 1 in which the yeast cells were removed by centrifugation. After fermentation and before chromatographic separation 9. Method of claim 1 in which the yeast cells were removed by filtration after fermentation. And before chromatographic separation 1 0. Method of claim 1 in which such chromatographic separation utilizes cation exchange resins to be useful as a filling material. In glass rod 1 1. Method of claim 10 in which the resin has kidney vinyl benzene cross. - Linget Sulfonetech Polystyrene Scaly Section 1 2. Method of claim 1 in which water is used as the solvent in chromatographic separation 1 3. Method of claim 1 in which the solution The aqueous xylose / hexose is hemicellulose hydrolyzate 1 4. Method of claim 1 in which the aqueous sylase / hexose solution is the filled part. Silose from sulphated liquids 1 5. Clause 1 in which ethanol is removed by evaporation or distillation after fermentation 1 6. Method of claim 1 in which Such fermentation was performed in a medium where the xylose concentration ranges from approximately 50 g / l to 300 g / l. 1 7. Method of claim 1 in which the fermentation was performed at pH during Approximately 3 to approximately 9 1 8. Claim Method 1 in which fermentation is performed at pH between approximately 5 and approximately 7 1 9. Claim Method 1 in which fermentation is performed. At temperatures between approximately 10 ° C and about 45 ° C 2 0. Method of claim 19 in which fermentation was performed at temperatures between approximately 25 ° C and 35 ° C 2. 1. Method of claim 1 in which the fermentation was performed with limited oxygen supply 2 2. Method of claim 1 in which the constituents are toxic to the yeast used for fermentation or other contaminants are separated from the aqueous xylose solution prior to fermentation 2. 3. The claim 22 method, in which the separation was carried out by the chromatographic junction 2. 4. Method for the production of xylitol from a solution containing at least 50 g / l of xylose and other free hexose. The process consists of: The fermentation of the solution by introducing the yeast strains cells can be converted back to xylose to xylitol, and another hexose to ethanol for a sufficient time in Silitol production; Separation of any xylitol-filled fraction by means of chromatographic separation; And the recovery of at least 90% of the recovered silitol contained therein, in crystal or other form 2 5. Method of claim 24 in which the fermentation was performed at between approximately 20 ° C and approximately 40 ° C 2. 6.The method of claim 25 in which fermentation was performed at approximately 30 ° C 2. 7.The method of claim 24 in which fermentation is performed at pH between approximately 3 and approximately 9 2. 8.The method of claim 27 in which fermentation is performed at pH between approximately 5 and approximately 7.