Method for extracting cellulose from straw stalk by using imidazole ion liquid
A technology of rice straw and ionic liquid, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve the problem of serious cellulose degradation such as dissolution temperature, achieve far-reaching social significance and economic value, simple equipment and mild conditions
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Embodiment 1
[0023] A method for extracting cellulose from rice straw with imidazole ionic liquid, the steps are as follows:
[0024] 1) Crushing rice straw into rice straw powder over 100 mesh;
[0025] 2) Mix rice straw powder with ionic liquid 1-allyl-3-methylimidazolium chloride (AMIMCl) at a mass ratio of 1:20 to obtain a mixture;
[0026] 3) Put the above mixture in an ultrasonic oscillator, use the ultrasonic power of 110W, and react at 60°C for 2h to obtain the reactant;
[0027] 4) Centrifuge the above reactant at 12000r / min for 10min, then separate the solid from the liquid, and take the supernatant;
[0028] 5) Add absolute ethanol to the supernatant obtained from the above separation, and the volume ratio of supernatant to absolute ethanol is 1:5 to obtain a mixed solution containing precipitates, and dry the obtained precipitates after suction filtration Preservation is the target product cellulose, and the filtrate after suction filtration is recovered;
[0029] 6) The rec...
Embodiment 2
[0035] A method for extracting cellulose from rice straw with imidazole ionic liquid, the steps are as follows:
[0036] 1) Crushing rice straw into rice straw powder over 100 mesh;
[0037] 2) Mix rice straw powder with ionic liquid 1-allyl-3-methylimidazolium chloride (AMIMCl) at a mass ratio of 1:30 to obtain a mixture;
[0038] 3) Put the above mixture in an ultrasonic oscillator, use ultrasonic power of 100W, and react at 60°C for 2h to obtain the reactant;
[0039] 4) Centrifuge the above reactant at 12000r / min for 10min, then separate the solid from the liquid, and take the supernatant;
[0040] 5) Add absolute ethanol to the supernatant obtained from the above separation, and the volume ratio of supernatant to absolute ethanol is 1:5 to obtain a mixed solution containing precipitates, and dry the obtained precipitates after suction filtration Preservation is the target product cellulose, and the filtrate after suction filtration is recovered;
[0041] 6) The recover...
Embodiment 3
[0047] A method for extracting cellulose from rice straw with imidazole ionic liquid, the steps are as follows:
[0048] 1) Crushing rice straw into rice straw powder over 100 mesh;
[0049] 2) Mix rice straw powder with ionic liquid 1-allyl-3-methylimidazolium chloride (AMIMCl) at a mass ratio of 1:40 to obtain a mixture;
[0050] 3) Put the above mixture in an ultrasonic oscillator, use an ultrasonic power of 80W, and react at 80°C for 1 hour to obtain a reactant;
[0051] 4) Centrifuge the above reactant at a speed of 12000r / min for 10min, then separate the solid from the liquid, and take the supernatant;
[0052]5) Add absolute ethanol to the supernatant obtained from the above separation, and the volume ratio of supernatant to absolute ethanol is 1:5 to obtain a mixed solution containing precipitates, and dry the obtained precipitates after suction filtration Preservation is the target product cellulose, and the filtrate after suction filtration is recovered;
[0053] ...
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