Technique for producing xylitol and dulcitol simultaneously

A technology of xylitol and dulcitol, applied in the biological field, can solve problems such as inability to utilize main sugar content, inability to fully utilize value, and inability to fully utilize

Active Publication Date: 2010-07-14
山东绿健生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the large-scale application of xylose mother liquor mainly focuses on the comprehensive application of the monosaccharides contained in it, such as the preparation of caramel pigment, the production of feed yeast, etc., and the value of various monosaccharides in the mother liquor cannot be fully utilized.
[0004] The patent CN 101029059A describes a method for producing welmaol by using galactose in the xylose mother liquor, but without separating and utilizing other sugars, the main sugar in the xylose mother liquor cannot be fully utilized
[0005] Patent CN 101555503A describes the method of using yeast to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: get mass concentration and be 90kg of xylose mother liquor of 65%, add demineralized water and be diluted to mass concentration and be 35%, xylose mother liquor is squeezed into decolorization kettle, adds gac 2.5kg by 4% of dry matter quality in xylose mother liquor At the same time, 0.47kg of calcium oxide was added according to 0.8% of the dry matter mass, and the stirring speed was adjusted to 200r / min. After the temperature of the feed liquid rose to 70°C, it was kept warm for 30min and filtered to obtain the xylose mother liquor decolorization solution; the decolorization solution was passed through an anode The anion exchange column carries out ion exchange to obtain a purified liquid, in which the content of xylose is 58.58%, the content of glucose is 8.39%, the content of galactose is 18.77%, and the content of arabinose is 12.63%.

[0029] Put the purified liquid into the simulated moving bed raw material tank, pass through the simulated moving be...

Embodiment 2

[0035] Embodiment 2: get mass concentration and be 90kg of xylose mother liquor of 65%, add demineralized water and be diluted to mass concentration and be 30%, xylose mother liquor is squeezed into decolorization kettle, adds gac 2.5kg by 4% of dry matter quality in xylose mother liquor At the same time, 0.12kg of calcium oxide was added according to 0.2% of the dry matter mass, and the stirring speed was adjusted to 200r / min. After the temperature of the feed liquid rose to 70°C, it was kept warm for 30min and filtered to obtain the xylose mother liquor decolorization solution; the decolorization solution was passed through an anode The anion exchange column carries out ion exchange to obtain a purified liquid, in which the content of xylose is 58.58%, the content of glucose is 8.39%, the content of galactose is 18.77%, and the content of arabinose is 12.63%.

[0036] Pour the purified liquid into the simulated moving bed raw material tank, pass through 8 columns of simulated...

Embodiment 3

[0042] Embodiment 3: get mass concentration and be 90kg of xylose mother liquor of 65%, add demineralized water and be diluted to mass concentration and be 40%, xylose mother liquor is squeezed into decolorization kettle, adds gac 2.5kg by 4% of dry matter quality in xylose mother liquor At the same time, 0.88kg of calcium oxide was added according to 1.5% of the dry matter mass, and the stirring speed was adjusted to 200r / min. After the temperature of the feed liquid rose to 70°C, it was kept warm for 30min and filtered to obtain the xylose mother liquor decolorization solution; the decolorization solution was passed through an anode The anion exchange column carries out ion exchange to obtain a purified liquid, in which the content of xylose is 58.58%, the content of glucose is 8.39%, the content of galactose is 18.77%, and the content of arabinose is 12.63%.

[0043] Pour the purified solution into the simulated moving bed raw material tank, pass through 8 columns of simulat...

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PUM

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Abstract

The invention discloses a technique for producing xylitol and dulcitol simultaneously, comprising the following steps: (1) diluting xylose mother liquor, carrying out chromatographic separation after decoloration, filtering and ion exchange and obtaining mixed liquor; (2) preparing the xylitol: adding nutritional components into the mixed liquor, inoculating yeast seed liquor after sterilization, carrying out fermentation and obtaining fermentation liquor; (3) filtering the fermentation liquor to remove the yeast, then carrying out decoloration, filtering and ion exchange, and then obtaining crystalline xylitol by evaporation, concentration and crystallization; (4) carrying out evaporation and concentration on the mixed liquor of galactose and arabitol obtained by chromatographic separation in the step (1), concentrating to the mass concentration of 35 to 45 percent, and then carrying out catalytic hydrogenation, thus obtaining the mixed liquor of the dulcitol and the arabitol; and (5) carrying out decoloration, filtering and ion exchange on the obtained mixed liquor, putting the mixed liquor into a crystallization kettle for evaporation till supersaturation, adding dulcitol seed crystal and seed crystal growth promoter, and carrying out crystallization to obtain crystalline dulcitol.

Description

technical field [0001] The invention relates to a process for simultaneously producing xylitol and dulcitol, belonging to the field of biotechnology. Background technique [0002] Both xylitol and welmaol are polyols. Xylitol is a new type of sweetener. Eating xylitol is not easy to cause dental caries and will not increase blood sugar. Therefore, it is widely used in the food industry as a sweetener, and as a Clinical nutritional and therapeutic agents for diabetic and hepatitis patients. In addition, it is also an important chemical raw material, which is widely used in national defense, leather, plastics and coatings. Weimao alcohol, also known as sweet alcohol, galactitol, hexyl alcohol, colorless crystalline powder, slightly sweet taste, insoluble in cold water and alcohol, easily soluble in boiling water, belongs to biochemical reagents, mainly used for bacterial identification and cultivation It is an important sugar that is indispensable for microbial research, dis...

Claims

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Application Information

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IPC IPC(8): C12P7/18C07C31/26C07C29/14C12R1/72
Inventor 任尚美景文利信成夫
Owner 山东绿健生物技术有限公司
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