A process for producing xylose from biomass raw materials

A biomass raw material, xylose technology, applied in the field of xylose production, can solve the problems of high acid-base energy consumption, complex xylose extraction process, etc., and achieve the effects of no acid-base consumption, avoiding processing difficulties, and avoiding esterification reactions.

Active Publication Date: 2015-09-16
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is that in the prior art, due to the existence of sulfate ions, the xylose extraction process is complicated and the acid-base energy consumption is high. Process with higher extraction rate of xylose

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  • A process for producing xylose from biomass raw materials

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Embodiment 1

[0047] First, the reeds (hemicellulose content 22.8%) are crushed, washed with water to remove dust and crushed to a particle size of 0.5-20cm.

[0048] The comprehensive utilization process of biomass raw materials described in this embodiment comprises the following steps:

[0049] (1) After crushing the reed raw material for pretreatment, under the catalysis of hydrogen peroxide, use an organic acid solution with a total acid concentration of 60% to cook the treated raw material, control the reaction temperature at 105°C, and react for 100 minutes. The mass ratio is 1:5, and the obtained reaction liquid is subjected to solid-liquid separation for the first time, wherein the mass ratio of acetic acid and formic acid forming the organic acid liquid is 3:1, and the mass ratio of hydrogen peroxide accounts for 4% of raw material mass;

[0050] (2) Under the catalysis of hydrogen peroxide, the solid obtained from the first solid-liquid separation is added to a mixed acid soluti...

Embodiment 2

[0056] First, the wheat straw (hemicellulose content 31.4%) is crushed, washed with water to remove dust and crushed to a particle size of 0.5-20cm.

[0057] The comprehensive utilization process of biomass raw materials described in this embodiment comprises the following steps:

[0058] (1) After crushing the wheat straw raw material for pretreatment, under the catalysis of hydrogen peroxide, use an organic acid solution with a total acid concentration of 70% to cook the treated biomass raw material, control the reaction temperature at 115°C, and react 95min, the solid-liquid mass ratio was 1:9, and the reaction solution obtained was subjected to solid-liquid separation for the first time, wherein the mass ratio of acetic acid and formic acid forming the organic acid liquid was 12:1, and the mass ratio of hydrogen peroxide accounted for 3% of the biomass raw material quality;

[0059] (2) Under the catalysis of hydrogen peroxide, the solid obtained from the first solid-liqu...

Embodiment 3

[0065] In this embodiment, the biomass raw material is corn stalks. First, the corn stalks (with a hemicellulose content of 35.7%) are crushed, washed with water to remove dust and crushed to a particle size of 0.5-2 cm.

[0066] The comprehensive utilization process of biomass raw materials described in this embodiment comprises the following steps:

[0067] (1) After crushing and pretreating the biomass straw raw material, under the catalysis of hydrogen peroxide, use an organic acid solution with a total acid concentration of 90% to cook the processed raw material, control the reaction temperature at 130°C, and react for 20 minutes , the mass ratio of solid to liquid is 1:8, and the obtained reaction liquid is subjected to solid-liquid separation for the first time, wherein the mass ratio of acetic acid and formic acid forming the organic acid liquid is 10:1, and the mass of hydrogen peroxide accounts for the 5% of the quality of the above-mentioned biomass raw materials; ...

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Abstract

The invention relates to a method for preparing xylose by using a biomass raw material, and concretely relates to a method for preparing xylose by comprehensively utilizing the biomass raw material. The method comprises the following steps: boiling the biomass raw material through a formic acid and acetic acid mixed organic acid under the catalysis action of hydrogen peroxide in order to obtain a pentose solution, decoloring the pentose solution, filtering, concentrating, and crystallizing to obtain required xylose crystals. The pentose solution is produced by boiling the biomass raw material through the formic acid and acetic acid mixed organic acid under the catalysis action of hydrogen peroxide, so the pentose solution contains no sulfate ions, thereby extra neutralization treatment is not needed in the pentose-to-xylose technology, the problem of difficult post-treatment after neutralization is avoided, no acid or alkali is consumed, and energy saving and no pollution are realized.

Description

technical field [0001] The invention relates to a method for producing xylose from biomass raw materials, in particular to a method for comprehensively utilizing biomass raw materials to produce xylose. Background technique [0002] Xylose is a component of xylan, which is widely found in plants. Xylose also exists in animal heparin, chondroitin and glycoproteins, and it is the linking unit of sugar chains and serine (or threonine) in some glycoproteins. Xylose in a free state has not been found in nature so far. Xylose has attracted widespread attention because it has no burden on islets and is suitable for diabetics. [0003] Xylose has more than 40 years of production experience in my country, and the production technology has reached the world level. At present, my country is already the world's largest producer and exporter of xylose, and with the development of the economy and the improvement of living standards, the domestic market continues to expand, providing ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K13/00
Inventor 唐一林江成真刘洁高绍丰张茜
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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