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Technologies for extracting cellulose from biomass raw material and preparing biochar

A biomass raw material and cellulose technology, applied in the field of cellulose extraction, can solve the problems that lignin and hemicellulose cannot be effectively utilized, and achieve the effects of shortening cooking time, reducing damage and high purity

Active Publication Date: 2013-05-15
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is the problem that a large amount of lignin and hemicellulose remaining in the process of extracting cellulose from biomass raw materials in the prior art cannot be effectively utilized

Method used

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  • Technologies for extracting cellulose from biomass raw material and preparing biochar

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Embodiment 1

[0048] In this embodiment, the reeds are first crushed to a particle size of 2-10 cm.

[0049] The present embodiment extracts the technology of cellulose from described reed, comprises the steps:

[0050] (1) After the reeds are pulverized and pretreated, use the organic acid liquid whose total acid concentration is 70wt% formic acid and acetic acid to cook the treated reeds. The mass ratio of acetic acid and formic acid in the organic acid liquid of the present embodiment is 1: 1, and before adding the reed raw material, add the hydrogen peroxide (H 2 o 2 ) as a catalyst, control the reaction temperature at 125°C, react for 60min, and have a solid-liquid mass ratio of 1:5, and carry out the first solid-liquid separation of the obtained reaction solution;

[0051] (2) The solid that solid-liquid separation obtains for the first time is added the organic acid liquid that total acid concentration is 70wt% formic acid and acetic acid to carry out acid washing, wherein the orga...

Embodiment 2

[0062] In this embodiment, firstly, the rice straw is crushed to a particle size of 2-10 cm.

[0063] The present embodiment extracts the technology of cellulose from described rice straw, comprises the steps:

[0064] (1) After the rice straw is pulverized and pretreated, use the organic acid liquid whose total acid concentration is 90wt% formic acid and acetic acid to cook the treated rice straw. The mass ratio of acetic acid and formic acid in the organic acid liquid of the present embodiment is 1: 8, and before adding the straw raw material, add hydrogen peroxide (H 2 o 2 ) as a catalyst, control the reaction temperature at 145° C., react for 20 minutes, and have a solid-liquid mass ratio of 1:8, and carry out the first solid-liquid separation of the obtained reaction solution;

[0065] (2) the solid that solid-liquid separation obtains for the first time is added the organic acid liquid that total acid concentration is 90wt% formic acid and acetic acid to carry out acid...

Embodiment 3

[0076] In the present embodiment, firstly, the bamboo slices are crushed into flakes with a length of 2-10 cm and a thickness of 2 mm.

[0077] The present embodiment extracts the technology of cellulose from described bamboo chip, comprises the steps:

[0078] (1) After the bamboo chips are pulverized and pretreated, use the organic acid solution whose total acid concentration is 95wt% formic acid and acetic acid to cook the processed one, the mass ratio of acetic acid and formic acid in the organic acid solution of the present embodiment is 1: 6, and before adding the bamboo chip raw material, add hydrogen peroxide (H 2 o 2 ) as a catalyst, control the reaction temperature at 90°C, react for 40min, and have a solid-liquid mass ratio of 1:6, and carry out the first solid-liquid separation of the obtained reaction solution;

[0079] (2) the solid that solid-liquid separation obtains for the first time is added the organic acid liquid that total acid concentration is 95wt% fo...

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Abstract

The invention relates to a method for extracting cellulose from a biomass raw material and co-producing biochar. According to the method, under the catalytic action of hydrogen peroxide, the cellulose is extracted by stewing the biomass raw material through organic acid consisting of methanoic acid and acetic acid, pickling, washing, bleaching and the like, and the biochar can be co-produced at the same time. Due to rational technology parameters, the whole technological line is suitable for wood raw materials and grass raw materials, so that the purity of the obtained cellulose is high; and the alpha-cellulose content is above 90 percent.

Description

technical field [0001] The invention relates to a method for extracting cellulose from biomass raw materials, in particular to a method for extracting cellulose from biomass raw materials and using black liquor produced in the process of extracting cellulose to prepare biochar. Background technique [0002] Biomass raw materials in the form of plants are mainly composed of cellulose, hemicellulose and lignin, of which cellulose accounts for about 40%, hemicellulose accounts for about 25%, and lignin accounts for about 20%. The total amount of rod biomass raw materials generated by photosynthesis exceeds 200 billion tons, so plant biomass raw materials are the most abundant and cheapest renewable resources on the earth. [0003] Cellulose is the main component of plant cell walls. The cellulose used for textile and papermaking in the world reaches 8 million tons per year. In addition, using separated and purified cellulose as raw material, rayon, cellophane, nitrate, acetat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C9/16D21C11/00C01B31/02C01B32/05
Inventor 唐一林江成真高绍丰刘洁孙智华
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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