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Method for separating and extracting cellulose, degraded hemicellulose and lignin from bamboo wood

A technology of hemicellulose and cellulose, which is applied in the field of utilization of plant resource components, can solve problems such as the ineffective utilization of hemicellulose, and achieve the effects of effective utilization, low production cost, and reduction of environmental pollution

Inactive Publication Date: 2017-05-17
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology allows us to use bamber plants (BAM), called Bambusia or Hemp) instead of hardwood trees that are expensive because they require harsh treatment processes like crushing them into small pieces beforehand. By doing this, we aimed at producing valuable products from these tiny parts through various methods like fermentation techniques. Overall, it provides an efficient way to produce useful substances with minimal impact on our natural world' s ecosystem.

Problems solved by technology

Technological Problem: Current methods use expensive processes or wasteful extraction techniques that have limitations such as poor productivity rates due to limited sources of material being processed. Therefore, it becomes necessary to develop new ways to efficiently convert bambaos without generating harmful side effects on their environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of solvent A: Prepare a solvent system consisting of γ-valerolactone, acid and water, wherein the mass fraction of γ-valerolactone is 60%, the mass fraction of sulfuric acid is 0.5%, and the rest is water.

[0020] (2) Separation of components: Take 3 g of bamboo as raw material, add 60 mL of solvent A, and heat at 160 °C for 30 min. After heating, the mixture was filtered, and the filter residue and filtrate were collected. The filter residue was washed with water, and then dried at 105° C. for 4 hours to obtain cellulose. Solid sodium chloride was added to the filtrate until the solution was saturated, and then treated in a sonicator until two phases formed with the aqueous phase on the lower layer and the gamma-valerolactone phase on the upper layer. The two phases are separated, the water phase is freeze-dried to obtain hemicellulose-degraded sugar, and the solvent in the γ-valerolactone phase is evaporated to obtain lignin. The yield of obtained c...

Embodiment 2

[0022] (1) Preparation of solvent A: prepare a solvent system consisting of γ-valerolactone, acid and water, wherein the mass fraction of γ-valerolactone is 40%, the mass fraction of hydrochloric acid is 0.3%, and the rest is water.

[0023] (2) Component separation: Take 5 g of bamboo as raw material, add 50 mL of solvent A, and heat at 160 °C for 30 min. After heating, the mixture was filtered, and the filter residue and filtrate were collected. The filter residue was washed with water, and then dried at 105° C. for 4 hours to obtain cellulose. Solid sodium chloride was added to the filtrate until the solution was saturated, and then treated in a sonicator until two phases formed with the aqueous phase on the lower layer and the gamma-valerolactone phase on the upper layer. The two phases are separated, the water phase is freeze-dried to obtain hemicellulose-degraded sugar, and the solvent in the γ-valerolactone phase is evaporated to obtain lignin. The obtained cellulose ...

Embodiment 3

[0025] (1) Preparation of solvent A: Prepare a solvent system consisting of γ-valerolactone, acid and water, wherein the mass fraction of γ-valerolactone is 90%, the mass fraction of sulfuric acid is 0.05%, and the rest is water.

[0026] (2) Separation of components: Take 5 g of bamboo as raw material, add 25 mL of solvent A, and heat at 150 °C for 20 min. After heating, the mixture was filtered, and the filter residue and filtrate were collected. The filter residue was washed with water, and then dried at 105° C. for 4 hours to obtain cellulose. Solid sodium chloride was added to the filtrate until the solution was saturated and then treated in a sonicator until two phases formed with the aqueous phase on the bottom and the gamma-valerolactone phase on top. The two phases are separated, the water phase is freeze-dried to obtain hemicellulose-degraded sugar, and the solvent in the γ-valerolactone phase is evaporated to obtain lignin. The obtained cellulose yield was 65% wit...

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Abstract

The invention relates to a method for separating and extracting cellulose, degraded hemicellulose and lignin from bamboo wood, and belongs to the technical field of utilization of plant resource components. The method comprises: taking bamboo wood as a raw material, adopting a solvent system composed of gamma-valerolactone, acid and water, carrying out treatment in a relatively mild condition, and performing separation to obtain cellulose, degraded hemicellulose and lignin. The problem of environmental pollution in conventional separation is overcome, and the method is eco-friendly. The whole process is easy to control, the production cost is relatively low, and the method is suitable for massive production and has bright industrial prospects. Lignin obtained from the method has the purity as high as 98%, and the method has excellent application prospects.

Description

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Claims

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Application Information

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Owner BEIJING FORESTRY UNIVERSITY
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