A kind of bagasse pretreatment method of activating surface groups

A bagasse and pretreatment technology, which is applied in the direction of pretreatment with alkaline compounds, raw material pretreatment, fiber raw material treatment, etc., can solve the problems of low environmental pollution, low cost of lime, and easy deposition, so as to reduce pollution and display The effect of high density and preventing bagasse agglomeration

Active Publication Date: 2016-08-17
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many cellulose pretreatment methods, they all have certain disadvantages. The physical method has less environmental pollution, but consumes too much energy; in the chemical method, only acid-base treatment can only remove hemicellulose, and the purity is not high. If The cost of recycling without recycling is high and it is easy to cause environmental pollution. The cost of lime is low, but the amount of lime required is relatively large, and it is easy to cause deposition

Method used

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  • A kind of bagasse pretreatment method of activating surface groups
  • A kind of bagasse pretreatment method of activating surface groups
  • A kind of bagasse pretreatment method of activating surface groups

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take the bagasse packaged in the sugar factory, and carry out pretreatment according to the following steps: (1) Weigh 50g of bagasse, add 750ml of 0.3% acetic acid solution, soak for 12h, and filter dry; (2) steam explosion treatment: add the above-mentioned bagasse to the steam explosion container , set the steam pressure to 1.9MPa, release the pressure after maintaining the pressure for 5 minutes, and take out the bagasse; (3) Alkali / hydrogen peroxide oxidation treatment: take 22.5g NaOH and dissolve it in 750ml water to prepare an aqueous NaOH solution, add the above-mentioned bagasse, and heat at 80°C Stir under low temperature for 4 hours, add 17ml of 30% hydrogen peroxide at the initial reaction, one hour and two hours of reaction respectively, and filter dry; (4) bleaching treatment: add 50ml30% hydrogen peroxide to 700ml water to prepare hydrogen peroxide solution, and the hydrogen peroxide solution processed in the previous step Add bagasse, stir at 70°C for 3 ...

Embodiment 2

[0038]Take the bagasse packaged in the sugar factory, and carry out pretreatment according to the following steps: (1) Weigh 50g of bagasse, add 600ml of 1% acetic acid solution, soak for 12h, and filter to dry; (2) steam explosion treatment: add the above bagasse to the steam explosion container , set the steam pressure to 1.3MPa, release the pressure after maintaining the pressure for 8 minutes, and take out the bagasse; (3) Alkali / hydrogen peroxide oxidation treatment: take 24.0g NaOH and dissolve it in 600ml water to prepare an aqueous solution of NaOH, add the above-mentioned bagasse, at 90°C Stir under low temperature for 3 hours, add 20ml concentration of 30% hydrogen peroxide at the beginning of the reaction, one hour and two hours respectively, and filter dry; (4) bleaching treatment: mix 18ml acetic acid and 5.7gNaClO 2 Add 582ml of water to prepare a mixed bleach solution, add the bagasse treated in the previous step, stir at 85°C for 1 hour, wash with water, and fil...

Embodiment 3

[0043] Take the bagasse packed in the sugar factory, and carry out pretreatment according to the following steps: (1) Weigh 50g of bagasse, add 700ml of 3% acetic acid solution, soak for 6h, and filter to dry; (2) steam explosion treatment: add the above bagasse to the steam explosion container , set the steam pressure to 2.8MPa, release the pressure after maintaining the pressure for 2 minutes, and take out the bagasse; (3) Alkali / hydrogen peroxide oxidation treatment: Weigh 10.5g NaOH and dissolve it in 700ml water to prepare an aqueous solution of NaOH, add the above-mentioned bagasse, at 70°C Stir under low temperature for 5 hours, add 31ml of hydrogen peroxide with a concentration of 30% at the initial reaction, one hour and two hours of reaction, and filter to dry; (4) bleaching treatment: add 60ml of 30% hydrogen peroxide to 700ml of water to prepare hydrogen peroxide solution, add bagasse in the previous step , stirred at 80° C. for 2 hours, washed with water, and filte...

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Abstract

The invention discloses a bagasse pretreatment method for activating surface groups. The bagasse fiber is pretreated by the unique process of acetic acid soaking, steam explosion, alkali and hydrogen peroxide oxidation, bleaching treatment, acetic acid activation, and surface activation, which greatly improves the surface structure of the bagasse fiber and makes the bagasse easy to graft and modify to prepare various Functional Materials. The method can destroy the intertwined structure of each component of the lignocellulose, effectively improve the surface of the bagasse fiber, activate the surface groups of the bagasse, and make the bagasse easier to be functionally modified.

Description

technical field [0001] The invention relates to the field of pretreatment of biomass materials, in particular to a bagasse pretreatment method for activating surface groups. Background technique [0002] my country is the third largest sugarcane planting country in the world, with an annual output of about 20 million tons of sugarcane fiber, which is a very concentrated and large amount of resources. The raw material of the pulp and paper industry, the economic value of this utilization method is very low, and it also causes pollution to the ecological environment. On the other hand, replacing fossil resources with biomass such as bagasse is a national strategic research direction. Through the purposeful conversion and utilization of cellulose, hemicellulose and lignin, the main components of sugarcane fiber, new materials, chemical raw materials, high calorific value fuels, functional foods and medicines that are important in modern social and economic life can be obtained....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/02D21B1/36D21C1/06D21C9/16D21C9/00
Inventor 马年方梁磊曾建李瑞雪王庆福康佩姿
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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