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Method for extracting cellulose from straw

A cellulose and straw technology, applied in the field of cellulose extraction, can solve problems such as unsatisfactory extraction effect, and achieve the effects of less cellulose impurity content and high extraction efficiency

Inactive Publication Date: 2018-01-26
周茂森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the consumption of traditional energy sources such as coal and oil and the energy crisis faced by the world, the development and utilization of sustainable energy has attracted widespread attention; cellulose is the most widely distributed and abundant biomass polymer in nature. Glucan is formed by connecting glucose molecules through β-1,4-glucosidic bonds; usually contains thousands of glucose units and is the main component of plant cell walls; plants can produce 100 billion tons of cellulose through photosynthesis every year, and at the same time Due to many advantages such as non-pollution, biocompatibility, easy degradability, and wide range of sources, it is regarded as an inexhaustible renewable resource and is widely used in textiles, light industry, chemical industry, medicine and energy. and other departments; there are also many extraction methods for straw cellulose in the prior art, such as the method disclosed in patent CN201210483986.3 using ionic liquid to extract cellulose from rice straw, but the extraction effect is not ideal

Method used

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  • Method for extracting cellulose from straw

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for extracting cellulose from straw, comprising the following steps:

[0026] (1) Beat the straw into 100 mesh, add lye to moisten it evenly, treat it at 120°C for 1 hour, filter it with suction, and dry it to obtain powder;

[0027] (2) Add hydrochloric acid-ammonium chloride solution to the powder, stir evenly and place it at 60°C for 30 minutes;

[0028] (3) After the temperature is lowered to normal temperature, add hydrogen peroxide and stir at constant temperature for 10 minutes;

[0029] (4) The material obtained in step (3) is filtered, and the obtained filter residue is put into 180° C., and the pressure is 700 Pa and processed for 20 min;

[0030] (5) After step (4), wash the filter residue with deionized water until it becomes neutral, then wash it twice with 80% ethanol, suction filter and dry.

[0031] Before adding the lye, the straw was steam-treated at 100° C. for 30 minutes.

[0032] The addition amount of described lye is 15% of straw weigh...

Embodiment 2

[0039] A method for extracting cellulose from straw, comprising the following steps:

[0040] (1) Beat the straw into 300 mesh, add lye to wet it evenly, treat it at 160°C for 3 hours, filter it with suction, and dry it to get the powder;

[0041] (2) Add hydrochloric acid-ammonium chloride solution to the powder, stir evenly and place it at 80°C for 60 minutes;

[0042] (3) After reducing the temperature to normal temperature, add hydrogen peroxide and stir at constant temperature for 20 minutes;

[0043] (4) The material obtained in step (3) is filtered, and the obtained filter residue is put into 200° C., and the pressure is 1200Pa and processed for 30 minutes;

[0044] (5) After step (4), wash the filter residue with deionized water until neutral, then wash with 90% ethanol for three times, suction filter and dry.

[0045] Before adding the lye, the straw was steam-treated at 200° C. for 40 minutes.

[0046] The addition of the lye is 20% of the straw weight.

[0047] ...

Embodiment 3

[0053] A method for extracting cellulose from straw, comprising the following steps:

[0054] (1) Beat the straw into 200 meshes, add lye to wet it evenly, treat it at 145°C for 2 hours, filter it with suction, and dry it to obtain powder;

[0055] (2) Add hydrochloric acid-ammonium chloride solution to the powder, stir evenly and place it at 65°C for 50 minutes;

[0056] (3) After the temperature is lowered to normal temperature, add hydrogen peroxide and stir at constant temperature for 15 minutes;

[0057] (4) The material obtained in step (3) is filtered, and the obtained filter residue is put into 185° C., and the pressure is 800 Pa and processed for 25 minutes;

[0058] (5) After step (4), wash the filter residue with deionized water until neutral, then wash with 85% ethanol for 3 times, suction filter and dry.

[0059] Before adding the lye, the straw was steam-treated at 180° C. for 35 minutes.

[0060] The addition amount of described lye is 18% of straw weight.

...

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Abstract

The invention belongs to the technical field of straw utilization and particularly relates to a method for extracting cellulose from straw. Straw is wetted by alkali liquor and subjected to high-temperature treatment, suction filtration and drying, a hydrochloric acid-ammonium chloride solution is added to obtained powder for stirring treatment, hydrogen peroxide is added for constant-temperaturestirring after cooling, filter residues are placed in a high-temperature and low-pressure environment for treatment after filtration, the filter residues are washed with deionized water to be neutraland finally washed with ethanol, suction filtration and drying are performed, and the straw cellulose can be obtained. With the adoption of the method, cellulose in the straw can be effectively extracted, the extraction efficiency is high, and the impurity content of the extracted cellulose is low.

Description

technical field [0001] The invention belongs to the technical field of straw utilization, in particular to a method for extracting cellulose from straw. Background technique [0002] With the consumption of traditional energy sources such as coal and oil and the energy crisis faced by the world, the development and utilization of sustainable energy has attracted widespread attention; cellulose is the most widely distributed and abundant biomass polymer in nature. Glucan is formed by connecting glucose molecules through β-1,4-glucosidic bonds; usually contains thousands of glucose units and is the main component of plant cell walls; plants can produce 100 billion tons of cellulose through photosynthesis every year, and at the same time Due to many advantages such as non-pollution, biocompatibility, easy degradability, and wide range of sources, it is regarded as an inexhaustible renewable resource and is widely used in textiles, light industry, chemical industry, medicine and...

Claims

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Application Information

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IPC IPC(8): D21C3/26
Inventor 周茂森
Owner 周茂森