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A kind of hydrolysis method of lignocellulosic raw material

A technology of lignocellulosic raw materials and lignin, which is applied in the field of utilization of agricultural and forestry biological materials, can solve problems such as difficult recycling and environmental pollution, and achieve the effects of avoiding time-consuming, simple and easy process, and improving the utilization rate of raw materials

Active Publication Date: 2017-11-14
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lignin is generally recovered from papermaking black liquor, which is difficult to recover and easy to cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The lignin removal and hydrolysis saccharification of embodiment 1 bamboo powder

[0023] Including the following steps:

[0024] (1) Crush the bamboo until the particle size is less than 2mm, take 100g of bamboo powder and add it to 500mL of 10% hydrogen peroxide and 10% sodium hydroxide solution by mass percentage, mix at room temperature, stir at 90°C for 60min, and vacuum Suction filtration is used for solid-liquid separation to obtain a solid filter residue (rich in hemicellulose and lignin), which is washed with water.

[0025] (2) Add 5 g of the solid filter residue obtained in step (1) to a 100 mL autoclave, add 50 mL of organic solvent (75 v / v% ethanol solution), catalyst 0.5 g PEG-OSO 3 H, additive (catalyst auxiliary agent) 0.05g manganese chloride, stirred and reacted at 150° C. for 30 min; after the reaction was completed, the obtained hydrolyzed solution was cooled rapidly, filtered, and the filtrate was measured for reducing sugar by the DNS method, and ...

Embodiment 2

[0027] The lignin removal and hydrolysis saccharification of embodiment 2 bamboo powder

[0028] Except that step (1) is slightly different from Example 1, the rest of the operations are the same as those described in Example 1.

[0029] In the step (1), 100g of bamboo powder is added to 500mL of 20% hydrogen peroxide and 20% aqueous sodium hydroxide solution.

Embodiment 3

[0030] The lignin removal and hydrolysis saccharification of embodiment 3 bamboo powder

[0031] Except that step (2) is slightly different from Example 1, all the other operations are the same as those described in Example 1.

[0032] The organic solvent added in step (2) is 75v / v% acetone solution.

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Abstract

The invention provides a method for hydrolyzing lignocellulosic raw materials, comprising: 1) adding an alkaline aqueous solution of hydrogen peroxide to lignocellulosic raw materials for reaction, after the reaction is completed, filtering and separating to obtain filter residue (rich in cellulose) and filtrate; 2) After the filter residue is washed with water, it is added to a high-pressure reactor, and an organic solvent, a catalyst and a catalyst auxiliary agent are added therein to carry out a hydrolysis reaction, and after the reaction is completed, it is filtered, and the filtrate contains reducing monosaccharides; Water ethanol, then adjust the pH value to 5-6 with inorganic acid, after standing still, filter, separate to obtain filter residue and filtrate; Centrifuge after placing, and the solid separated is lignin. The process of the lignocellulosic raw material provided by the invention is simple and feasible, environmentally friendly and low-toxic, the lignin removal recovery rate is high, the saccharification efficiency of the separated cellulose is high, the industrialization is easy to realize, and the application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of utilization of agricultural and forestry biological data, in particular to a method for hydrolyzing lignocellulosic raw materials. Background technique [0002] Lignocellulosic raw materials are the most abundant renewable resources on the earth. Adopting appropriate technologies to convert lignocellulosic raw materials into biomass fuels and bio-based products is of great significance to the sustainable development of my country's economy and society. In lignocellulosic raw materials, cellulose accounts for about 35-45% of the dry weight, hemicellulose accounts for about 20-40%, and lignin accounts for 20-30%. Among them, the use of cellulose and hemicellulose in biomass to produce liquid fuels such as fuel ethanol and butanol through hydrolysis and saccharification is one of the important research directions, and sugar is also an important chemical raw material. At present, the hydrolysis of lignocellu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H7/00C09J197/00
Inventor 李志强江泽慧费本华张融
Owner INT CENT FOR BAMBOO & RATTAN