Method for producing xylose by sugarcane leaves

A sugarcane leaf and xylose technology, applied in the production of sugar, sugar production, application and other directions, can solve the problems of heavy environmental pollution, difficult biochemical treatment, etc., and achieve simple desalination, high production sugar extraction rate and low production cost. Effect

Inactive Publication Date: 2012-07-25
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The industrial traditional hemicellulose hydrolysis process to prepare xylose basically adopts the hydrolysis method of sulfuric acid, which produces a large amount of salty sewage and waste residue in the whole process, which is difficult to biochemically treat and causes serious environmental pollution.

Method used

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  • Method for producing xylose by sugarcane leaves

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Effect test

Embodiment 1

[0024] (1) After washing the sugarcane leaves with clear water, dry and pulverize them into 60-mesh powder for subsequent use;

[0025] (2) Take 100 grams of sugarcane leaf powder and add 800 mL of dilute sulfuric acid with a mass percentage of 0.5% to fully mix, and then cook at 105 ° C for 0.3 h;

[0026] (3) After the pretreatment, the sugarcane leaf mixture was filtered, and the filtrate was discarded to obtain 88.3 grams of solid material, which was then fully mixed with 1068 mL of 1.5% dilute hydrochloric acid by mass percentage, and then digested and hydrolyzed in a cooking pot for 2 hours at 121° C.;

[0027] (4) After hydrolysis, 870 mL of the obtained hydrolyzate was filtered, decolorized and desalted three times, concentrated three times, powdered activated carbon was used for decolorization, 26.1 g of activated carbon was added, and the temperature was kept at 60°C for 60 minutes to decolorize the hydrolyzed solution, and anion and cation exchange resins were used f...

Embodiment 2

[0033] (1) After washing the sugarcane leaves with clear water, dry and pulverize them into 80-mesh powder for subsequent use;

[0034] (2) Take 100g of sugarcane leaf powder, add 1000mL of dilute sulfuric acid with a mass percentage of 0.1%, mix well, and then cook at 100°C for 0.6h;

[0035] (3) After the pretreatment, the sugarcane leaf mixture was filtered, and the filtrate was discarded to obtain 86.7 g of solid material, which was fully mixed with 688 mL of dilute hydrochloric acid with a mass percentage of 1.0%, and then digested and hydrolyzed in a cooking pot for 4 hours at 125° C.;

[0036] (4) After hydrolysis, 531 mL of the obtained hydrolyzate was filtered, decolorized and desalted three times, concentrated three times, powdered activated carbon was used for decolorization, 26.5 g of activated carbon was added, and the temperature was kept at 70 ° C for 30 minutes to decolorize the hydrolyzed solution, and anion and cation exchange resins were used for desalination...

Embodiment 3

[0042] (1) After washing the sugarcane leaves with clear water, dry and pulverize them into 100-mesh powder for subsequent use;

[0043] (2) Take 100g of sugarcane leaf powder, add 1200mL of dilute sulfuric acid with a mass percentage of 0.4%, mix thoroughly, and then cook at 90°C for 0.8h;

[0044] (3) After the pretreatment, the sugarcane leaf mixture was filtered, and the filtrate was discarded to obtain 82.3 g of solid material, which was fully mixed with 984 mL of dilute formic acid with a mass percentage of 7%, and then digested and hydrolyzed in a cooking pot for 5 hours at 110° C.;

[0045] (4) After hydrolysis, 836 mL of the obtained hydrolyzate was filtered, decolorized and desalted three times, concentrated three times, powdered activated carbon was used for decolorization, 50.1 g of activated carbon was added, and the temperature was kept at 80 °C for 40 minutes to decolorize the hydrolyzed solution, and anion and cation exchange resins were used for desalination. ...

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Abstract

The invention relates to a method for producing xylose by sugarcane leaves, which comprises the following steps: carrying out fore treatment and pretreatment on the raw material sugarcane leaves to decontaminate, acid hydrolyzing the raw material by a high-temperature cooking and steaming manner, and filtering to obtain a hydrolysate; carrying out three times of concentration and three times of ion-exchange and decoloration on the hydrolysate to obtain a low-concentration xylose solution; concentrating the low-concentration xylose solution to obtain a high-concentration xylose syrup; and crystallizing or spray drying the syrup so as to obtain powdered sugar. The process is simple; multistage ion-exchange and decoloration are carried out, deacidification is not needed in the process; the quality of product is good, the production cost is low, the salt content of discharge of sewage is less, and less three wastes are generated.

Description

technical field [0001] The present invention relates to a method for preparing xylose. Specifically, a method of producing xylose from sugarcane leaves. Background technique [0002] Xylose is an important functional five-carbon sugar. It has the characteristics of low calorie, high sweetness, non-digestion by the human body, and the ability to increase the value of bifidobacteria in the body. It is beneficial to the health of the intestinal tract. It is an important raw material for the production of xylitol. It is widely used in food, medicine, chemical industry and other industries. At present, the raw materials used to extract xylose are mainly hemicellulose raw materials such as corncobs, cottonseed hulls, bagasse and other agricultural wastes. Sugar cane sugar is a pillar industry in Guangxi, and the amount of sugar cane planted ranks first in the country. After the sugarcane is harvested, a large amount of sugarcane leaves are burned or discarded in the field to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
Inventor 李坚斌魏承厚崔素芬罗左青雷光鸿曹敏黄迎春
Owner GUANGXI UNIV
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