Process for producing xylose by lignocellulose biomass

A technology of lignocellulose and biomass, applied in sugar production, sugar production, food science, etc., can solve the problems of complex extraction process, high acid-base energy consumption, etc., achieve simple process route, high acidolysis efficiency, avoid Dealing with Difficult Effects

Active Publication Date: 2014-08-13
JINAN SHENGQUAN GRP SHARE HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is that in the process of extracting xylose by polypentose in the prior art, the problem of complex extraction process and high energy consumption of acid and alkali due to the existence of sulfate ions, and then provide a kind of Xylose extraction process with simple process route and low energy consumption;

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  • Process for producing xylose by lignocellulose biomass

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Embodiment 1

[0047] In this embodiment, first corn cobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%) are broken, washed with water to remove dust and crushed to particle size 0.5-20cm, preferably 2-5cm.

[0048] The comprehensive utilization technique of lignocellulosic biomass described in this embodiment comprises the steps:

[0049] (1) After 106.52g of corncob raw material is pulverized and pretreated, use a concentration of 30% formic acid and a concentration of 50% acetic acid and 20% water to acid hydrolyze the treated lignocellulosic biomass, and control the reaction temperature at 120 ℃, reacted for 300min, the liquid-solid mass ratio of the mixed acid liquid of the formic acid and acetic acid to the biomass raw material was 1:6, and the obtained reaction liquid was subjected to solid-liquid separation for the first time;

[0050] (2) adding 30% formic acid and 50% acetic acid to the solid separated in step (1) for acid wash...

Embodiment 2

[0056] In this embodiment, first corn cobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%) are broken, washed with water to remove dust and crushed to particle size It is 2-5cm.

[0057] The comprehensive utilization technique of lignocellulosic biomass described in this embodiment comprises the steps:

[0058] (1) After 532.6 kg of biomass raw material is pulverized and pretreated, the lignocellulosic biomass after treatment is acid-hydrolyzed with 80% formic acid and 10% acetic acid and 10% water, and the reaction temperature is controlled at 90 ℃, reacted for 600min, the liquid-solid mass ratio of the mixed acid solution of formic acid and acetic acid to the biomass raw material was 1:3, and the obtained reaction solution was subjected to solid-liquid separation for the first time;

[0059] (2) The solid that is separated in the step (1) is added with a concentration of 80% formic acid and 10% acetic acid and 10% water f...

Embodiment 3

[0065] In this embodiment, first corn cobs (mass composition: moisture 6.12%, cellulose 35.19%, hemicellulose 32.1%, lignin 23.7%, other 2.95%) are broken, washed with water to remove dust and crushed to particle size It is 0.5-2cm.

[0066] The comprehensive utilization technique of lignocellulosic biomass described in this embodiment comprises the steps:

[0067] (1) After the 319.56Kg biomass raw material is pulverized and pretreated, use 60% formic acid and 40% acetic acid to carry out acid hydrolysis on the treated lignocellulosic biomass, control the reaction temperature at 150° C., and react for 180 minutes, The liquid-solid mass ratio of the mixed acid liquid of the formic acid and acetic acid to the biomass raw material is 1:10, and the obtained reaction liquid is subjected to solid-liquid separation for the first time;

[0068] (2) adding 60% formic acid and 40% acetic acid to the solid separated in step (1) for acidolysis (washing at 60° C. for 30 min), and perform...

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Abstract

The invention relates to a method for producing xylose by lignocellulose biomass, and particularly relates to a method for producing xylose by comprehensive utilization of lignocellulose biomass. The method of the invention comprises the following steps: performing acidolysis of lignocellulose biomass by a mixed organic acid of formic acid and acetic acid to obtain a pentose solution, performing decoloration of the obtained pentose solution, then performing desalting, concentration, and crystallization to obtain the xylose crystals. According to the process of the invention, since the pentose solution is obtained by acidolysis of lignocellulose biomass by using a mixed acid of formic acid and acetic acid, the pentose solution contains no sulfate ion; therefore, no additional neutralization treatment is required during the process of preparing xylose from pentose, and the problem of difficult post-treatment after neutralization is avoided; the process of the invention has no acid or base consumption, is energy saving, and free of pollution.

Description

technical field [0001] The invention relates to a method for preparing xylose from lignocellulosic biomass, in particular to a method for comprehensively utilizing lignocellulosic biomass to prepare 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, providin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K13/00
Inventor 唐一林江成真高绍丰马军强刘洁栗昭争赵兴国郭雨霖
Owner JINAN SHENGQUAN GRP SHARE HLDG CO LTD
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