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Method for preparing xylose from straws by combining acid pretreatment with centrifugal method

A technology of pretreatment and centrifugation, which is applied in the direction of xylose production, sugar production, sugar production, etc., can solve the problems of high impurities and low extraction rate, so as to increase the yield of xylose, reduce the generation of furfural, and realize the resource recovery. The effect of high value utilization

Pending Publication Date: 2020-11-27
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for preparing xylose from straw with acid pretreatment combined with centrifugation, so as to solve the problems of low extraction rate and many impurities in the existing method of extracting xylose from straw

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method for preparing xylose from stalks by acid method pretreatment combined with centrifugation method comprises the following steps:

[0022] 1) Take the straw raw material, pass it through a 100-mesh sieve after grinding, and obtain the straw powder after grinding and sieving;

[0023] 2) Bake the ground and sieved straw powder at 105°C for 6 hours, then air it to room temperature, and grind it evenly to obtain 100 mesh dry straw powder for later use;

[0024] 3) Take the 2g 100 mesh dry straw powder obtained in step 2), place it in a 50mL reactor, and add 24ml of acidic catalyst solution, tighten the reactor, close the exhaust valve, the acidic catalyst solution is benzenesulfonic acid solution, The content of solute in the described benzenesulfonic acid solution is 15g / L;

[0025] 4) Set the hydrolysis reaction in the reactor to be processed at 170°C for 15 minutes, and the balance rotor will continue to mix the contents of the reactor evenly during the reacti...

Embodiment 2～4

[0029] The difference from Example 1 is that: in step 3), the acidic catalyst solutions are respectively ferric chloride solution, aluminum chloride solution and formic acid solution.

Embodiment 5

[0031] The method for preparing xylose from stalks by acid method pretreatment combined with centrifugation method comprises the following steps:

[0032] 1) Take the straw raw material, pass it through a 100-mesh sieve after grinding, and obtain the straw powder after grinding and sieving;

[0033] 2) Bake the ground and sieved straw powder at 95°C for 8 hours, then air it to room temperature, and grind it evenly to obtain 100 mesh dry straw powder for later use;

[0034] 3) Take the 2g 100 mesh dry straw powder obtained in step 2), place it in a 50mL reactor, and add 16ml of acidic catalyst solution, tighten the reactor, close the exhaust valve, the acidic catalyst solution is ferric chloride solution, The content of solute in the ferric chloride solution is 15g / L;

[0035] 4) Set the hydrolysis reaction in the reaction kettle to be processed at 130°C for 30 minutes, and the balance rotor will continue to mix the contents of the kettle evenly during the reaction process;

...

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Abstract

The invention discloses a method for preparing xylose from straws by combining acid pretreatment with a centrifugal method, which comprises the following steps: taking straw raw materials, grinding, and screening; baking the ground and sieved straw powder, airing to room temperature, and uniformly grinding to obtain 100-mesh dry straw powder for later use; taking the dried straw powder obtained inthe step 2), placing the dried straw powder in a reaction kettle, and adding an acidic catalyst solution which is an organic acid solution or a strong acid and weak base salt solution for hydrolysis;after the reaction is finished, opening an exhaust valve, and quickly cooling the reaction kettle to obtain treated straw; then, separating bottom slag and liquid after the straw is subjected to centrifugal treatment, and then filtering the liquid through an organic filter membrane to obtain a straw supernatant taking xylose as a main solute; according to the method for preparing xylose from straw through acid pretreatment in combination with the centrifugal method, the xylose yield can be increased, the extracted xylose can be used as a food additive, a xylitol raw material and the like, andtherefore resource high-value utilization of forestry and agricultural residues is achieved.

Description

technical field [0001] The invention provides a method for preparing xylose from straw by acid method pretreatment combined with a centrifugation method, which is a method for high-value utilization of agricultural and forestry waste resources. Background technique [0002] As a large agricultural country, my country has a large area of ​​corn stalks. Corn is one of the three major food crops in China, with an annual output of 100 billion tons. When corn is harvested, there will be a large amount of corn stalks. Realizing the high-value utilization of corn stalks will generate greater economic value. Corn stalks are composed of cellulose, hemicellulose, and lignin. Xylose is produced by the hydrolysis of hemicellulose, but hemicellulose will interweave with cellulose and lignin through some chemical bonds to form a complex natural structure. Anti-degradation barrier, this complex structure adversely affects hemicellulose hydrolysis and xylose production. [0003] Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
CPCC13K13/002
Inventor 王伟云王康妮黄圣钊李润东
Owner SHENYANG AEROSPACE UNIVERSITY
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