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Method for treating cellulose

A treatment method and cellulose technology, applied in the field of cellulose, can solve problems such as the complexity of the film-forming process, and achieve the effects of simplifying the film-forming process, high utilization efficiency, and simple process

Inactive Publication Date: 2015-05-20
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its film-forming process is more complicated, and more toxic chemicals are used to participate in it.

Method used

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  • Method for treating cellulose

Examples

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Effect test

Embodiment 1

[0022] Add 1g of microcrystalline cellulose and 50mL of water into a 250mL beaker, add 50mL of copper ethylenediamine solution with a concentration of 1mol / L after fully moistening, stir vigorously to fully dissolve the cellulose, and obtain copper ethylenediamine dissolved in cellulose Amine solution.

[0023] Put the above beaker in an ice-water bath. After the temperature is constant, slowly add concentrated sulfuric acid dropwise to it, and keep stirring. value up to 6. After filtering, the filter residue is washed three times with a dilute sulfuric acid solution with a mass percentage below 30%, and finally washed with water until neutral to obtain regenerated cellulose.

[0024] In a 100mL plastic bottle, add 0.8g of the above-mentioned regenerated cellulose, adjust the pH value to 4.8 with 40mL of citric acid-sodium citrate buffer solution, the amount of cellulase used is 15FPU / g regenerated cellulose, and the enzymatic hydrolysis temperature is 50°C. The stirring spe...

Embodiment 2

[0028] Grind moso bamboo into bamboo powder, take 10g of bamboo powder and add it to a beaker, then add 70mL of sodium chlorite (2% by mass fraction) / acetic acid (4% by mass fraction) solution, place the beaker in a water bath at 75°C, After 2 hours, filter, wash, and add 70 mL of fresh sodium chlorite / acetic acid solution to the filter residue, repeat several times until the filter residue turns white, indicating that the lignin has been completely removed and bamboo cellulose is obtained.

[0029] Add 1g of the above-mentioned bamboo cellulose and 50mL of water into a 250mL beaker, add 50mL of copper ethylenediamine solution with a concentration of 1.5mol / L after fully moistening, stir vigorously to fully dissolve the bamboo cellulose, filter to obtain dissolved cellulose copper ethylenediamine solution.

[0030] Put the above beaker in an ice-water bath. After the temperature is constant, slowly add concentrated sulfuric acid dropwise to it, and keep stirring. value up to ...

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Abstract

The invention relates to a method for treating cellulose. The method comprises the following steps of: dissolving the cellulose into a copper ethylene diamine solution, adding an inorganic acid to separate out regenerated cellulose, separating the obtained regenerated cellulose, performing enzymatic hydrolysis and saccharification or preparing a regenerated cellulose film. By adopting the treatment method provided by the invention, the hydrolysis and saccharification efficiency of the cellulose is greatly improved, and the utilization efficiency of the cellulose is improved; by adopting the treatment method, the film forming process of the cellulose is simplified, and the manufacturing cost is reduced; the copper ethylene diamine solution used in the treatment method can be recycled, so the treatment method is environment-friendly, and the cost is further reduced. In conclusion, the treatment method is simple, convenient, low in cost and high in utilization efficiency of the cellulose, and is wide in application prospect.

Description

technical field [0001] The invention relates to the field of cellulose, in particular to a method for treating cellulose. Background technique [0002] Today, as fossil energy sources such as oil, coal and natural gas are becoming increasingly depleted, the development of renewable biomass energy materials has broad application prospects. The preparation of sugar compounds from lignocellulosic raw materials and the development of a series of sugar platform compounds are one of the hot research directions. Cellulose is generally obtained through two steps of pretreatment and enzymatic hydrolysis. Natural cellulose has a dense structure, and the efficiency of direct enzymatic hydrolysis is not high, so certain pretreatment methods are required. Commonly used pretreatments include physical, chemical and biological methods. These methods can improve the enzymatic hydrolysis efficiency of cellulose to varying degrees. However, for fiber raw materials with denser structure and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/14C08J5/18C08L1/02
Inventor 李志强江泽慧费本华刘杏娥
Owner INT CENT FOR BAMBOO & RATTAN
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