Xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws

A technology of biomass straw and xylooligosaccharides, applied in the field of bioengineering, can solve the problems of three-dimensional graphene, environmental pollution, waste of mineral resources, etc.

Active Publication Date: 2017-02-15
张冰青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above synthetic methods are not only complicated in process and high in cost, but also mostly transformed from mineral raw materials, causing environmental pollution and waste of mineral resources
At present, there is no relevant report on the preparation of three-dimensional graphene by using lignosulfonate

Method used

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  • Xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws
  • Xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws
  • Xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Cut corn stalks into 3-5cm sections, remove impurities, mix them with solid heteropolyphosphotungstic acid and acidic ionized water in proportion, and carry out a stage of steaming in a reactor (HZ2805BH digester, Zhangjiagang Huahang Paper Machinery Equipment Co., Ltd.). Wherein, the dosage of the solid heteropolyacid is 2 wt% of the dry basis of corn stalks, and the mass ratio of the dry basis of corn stalks to acidic ionized water is 1:6. When carrying out one-stage steaming, feed sulfur dioxide into the reactor, the feeding amount of the sulfur dioxide is 2wt% of the dry basis mass of corn stalks, and the feeding rate is 100m 3 / h, the temperature of the first stage of steaming is about 165°C, the pressure is about 1MPa, and the time is 65min;

[0064] The slurry obtained after one stage of steaming was subjected to five-stage press countercurrent washing with a twin-screw extruder (ZSLXⅡ type twin-screw extruder, Zhucheng Hongyu Light Machine Machinery Co., Ltd.), ...

Embodiment 2

[0076] Cut corn stalks into 3-5cm sections, remove impurities, mix them with solid heteropolyphosphotungstic acid and acidic ionized water in proportion, and carry out a stage of steaming in a reactor (HZ2805BH digester, Zhangjiagang Huahang Paper Machinery Equipment Co., Ltd.). Wherein, the dosage of the solid heteropolyacid is 1 wt% of the dry basis of corn stalks, and the mass ratio of the dry basis of corn stalks to acidic ionized water is 1:3. When carrying out one-stage steaming, feed sulfur dioxide into the reactor, the feeding amount of the sulfur dioxide is 2wt% of the dry basis mass of corn stalks, and the feeding rate is 150m 3 / h, the temperature of the first stage of steaming is about 160°C, the pressure is about 0.8MPa, and the time is 70min;

[0077] The slurry obtained after one stage of steaming was subjected to five-stage press countercurrent washing with a twin-screw extruder (ZSLXⅡ type twin-screw extruder, Zhucheng Hongyu Light Machine Machinery Co., Ltd.)...

Embodiment 3

[0087] Cut the straw into 3-5cm sections, remove impurities, mix with solid heteropolyacid phosphotungstic acid and acid ion water in proportion, and carry out a stage of steaming in a reactor (HZ2805BH digester, Zhangjiagang Huahang Paper Machinery Equipment Co., Ltd.), wherein , the amount of the solid heteropolyacid is 3wt% of the dry weight of rice straw, and the mass ratio of the dry weight of rice straw to acidic ionized water is 1:7. When carrying out one stage of steaming, feed sulfur dioxide into the reactor, the feed rate of said sulfur dioxide is 5wt% of the dry basis mass of rice straw, and the feed rate is 320m 3 / h, the temperature of the first stage of steaming is about 165°C, the pressure is about 0.9MPa, and the time is 73min;

[0088] The slurry obtained after one stage of steaming was subjected to five-stage press countercurrent washing with a twin-screw extruder (ZSLXⅡ type twin-screw extruder, Zhucheng Hongyu Light Machine Machinery Co., Ltd.), and the was...

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Abstract

The invention belongs to the field of biological engineering, and provides a xylooligosaccharide, dietary fiber and three-dimensional graphene preparation method based on biomass straws. The preparation method comprises the following steps: conducting primary digestion and multi-stage screw pressing on the biomass straws so as to obtain primary digestion residues and coarse glucose liquid, and enzymatically hydrolyzing, clarifying, decolorizing, concentrating and drying the coarse glucose liquid so as to obtain xylooligosaccharide; conducting secondary digestion and multi-section double-roll extrusion on the primary digestion residues so as to obtain secondary digestion residues and black liquid, and conducting high-pressure homogenizing, mixed enzyme treatment and concentrating and drying on the secondary digestion residues so as to obtain dietary fibers; and conducting purifying, concentrating and drying, pre-carbonizing treatment, deoxidizing treatment, rinsing, drying and high-temperature carbonizing on the black liquid so as to obtain the three-dimensional graphene. The method provided by the invention achieves the full and efficient utilization of the straws, and the finished products (the xylooligosaccharide, the dietary fibers and the three-dimensional graphene) are good in quality. The method, which is free from the discharge of waste gas, waste liquid and residue, is safe and environment-friendly. The method provided by the invention can reduce production cost and improve a production effect, therefore the method is applicable to large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of biological engineering, and in particular relates to the utilization of biomass straws. Background technique [0002] Biomass straw contains a large amount of cellulose, hemicellulose and lignin, which exist widely and can be used as a low-cost, environmentally friendly, and mass-produced carbon source, providing sufficient conditions for the comprehensive utilization of straw. As a large agricultural country, my country has widely planted crops such as corn, wheat, and rice, which leads to a large output of straw. Relevant surveys show that the total amount of straw in my country is as high as 600 million tons every year. Apart from a small amount of these organic raw materials being used for feed, returning to the field and fertilizer, a large part is burned, causing environmental pollution and waste of resources. [0003] With the increasingly serious situation of energy shortage, environmental pollution and cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/12C12P19/04C12P19/00A23L33/21C01B32/184
CPCC01P2002/82C01P2004/04C12P19/00C12P19/04C12P19/12C12P19/14
Inventor 张冰青张袆晶罗希祁怡欣张莹张延林张胜聚崔大伟国金祥李辉杜政崔浩冉
Owner 张冰青
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