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Production method for increasing yield of xylose

A production method and technology of xylose, applied in the field of improving xylose yield, can solve the problems of low xylose yield and high cost, and achieve the effects of improving purity, convenient operation and efficient method

Inactive Publication Date: 2017-06-13
FUTASTE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of production method that improves xylose yield, overcomes the xylose yield low, the high cost etc. problem that exists in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Take 1.5 kg of corn cobs as raw material, add 15 kg of water for washing pretreatment, filter, and dry at 105° C. to obtain dried materials;

[0043] (2) According to the solid-liquid mass ratio of 1:8, add 12kg of sulfuric acid solution with a mass concentration of 2.0% to the drying material, stir and mix thoroughly, put it in a high-pressure container for hydrolysis, the hydrolysis temperature is 120°C, the hydrolysis time is 120min, and it is filtered to obtain Hydrolyzate;

[0044] (3) The hydrolyzate is decolorized with activated carbon, the amount of activated carbon added is 5% of the quality of the hydrolyzed solution, the decolorized temperature is 65°C, and it is incubated for 30min to obtain a decolorized solution with a light transmission of 60%. After membrane filtration, the filtrate enters electrodialysis for desalination to obtain electrodialysate with a pH of 3.67;

[0045] (4) Concentrate the electrodialysis solution by nanofiltration membrane to...

Embodiment 2

[0051] (1) Take 2 kg of raw corncobs, add 30 kg of water to carry out washing pretreatment, filter, and dry at 60 ° C to obtain dried materials;

[0052] (2) According to the solid-liquid mass ratio of 1:10, add 20 kg of sulfuric acid solution with a mass concentration of 1.50% to the drying material, stir and mix thoroughly, put it in a high-pressure container for hydrolysis, the hydrolysis temperature is 105 ° C, the hydrolysis time is 110 minutes, and it is filtered to obtain Hydrolyzate;

[0053] (3) Decolorize the hydrolyzed solution with activated carbon, the amount of activated carbon added is 1% of the quality of the hydrolyzed solution, the decolorized temperature is 50°C, and it is incubated for 50min to obtain a decolorized solution with a light transmission of 62.1%. After membrane filtration, the filtrate enters electrodialysis for desalination to obtain an electrodialysis solution with a pH of 3.78;

[0054] (4) Concentrate the electrodialysis solution by nanofi...

Embodiment 3

[0060] (1) Take 2 kg of raw corncobs, add 40 kg of water to carry out washing pretreatment, filter, and dry at 80 ° C to obtain dried materials;

[0061] (2) According to the solid-liquid mass ratio of 1:6, add 12kg of sulfuric acid solution with a mass concentration of 2.5% to the drying material, fully stir and mix, put it in a high-pressure container for hydrolysis, the hydrolysis temperature is 130°C, the hydrolysis time is 100min, and it is filtered to obtain Hydrolyzate;

[0062] (3) Activated carbon decolorization is carried out to the hydrolyzed solution, the added amount of activated carbon is 7% of the hydrolyzed solution quality, the decolorized temperature is 75 ℃, and it is incubated for 60 min to obtain a decolorized solution with a light transmission rate of 69.8%, and the decolorized solution enters electrodialysis for desalting, and obtains pH 3.70 electrodialysate;

[0063] (4) Concentrate the electrodialysis solution by nanofiltration membrane to a refracti...

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Abstract

The invention discloses a production method for increasing a yield of xylose, and relates to the technical field of functional sugar production. The production method comprises the following steps of raw material pretreatment, hydrolysis, primary purification, primary concentration, glucose removal with yeast, secondary purification, condensation crystallization, and crystallized xylose mother solution utilization. According to the production method, the active yeast is added for removing glucose, so that the purity of the xylose is improved; batch treatment is performed, so that the yield of the xylose in a first batch is increased; when a feed solution in a second batch is treated, a mother solution recycling method is adopted, so that the purity of the xylose keeps in a xylose crystallization range; and partial xylose is extracted from a mother solution, so that a purpose of entirely increasing the yield of the xylose is achieved. The production method replaces a primary ion exchange resin method with an electrodialysis desalination method, so that pH (potential of hydrogen) of a sugar solution is effectively increased; and the sugar solution suitable for removing the glucose with the yeast can be obtained without value adjustment. The method is high-efficiency, energy-saving and convenient to operate, and effectively increases the yield of the xylose.

Description

technical field [0001] The invention relates to the technical field of functional sugar production, in particular to a method for increasing xylose yield. Background technique [0002] Xylose is a five-carbon sugar, which mainly exists in plant hemicellulose in the form of polycondensation in nature. The traditional method of producing xylose is hydrolysis-first decolorization-first ion exchange-first concentration-second decolorization-secondary The steps of ion exchange-secondary concentration-crystallization are used to obtain crystalline xylose. This method is a relatively mature xylose production process. Through activated carbon decolorization and ion exchange resin purification, xylose with high purity and meeting crystallization requirements can be obtained. However, although this xylose liquid has the highest content of xylose, it also contains about 20% miscellaneous sugars, including glucose and arabinose. Can not meet the requirements of crystallization again, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
Inventor 王关斌孙鲁邱学良曹玉华杜瑞锋李毅沈丽丽
Owner FUTASTE PHARM CO LTD
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