Method for selectively separating lignin and cellulose from lignocellulose biomasses
A lignocellulosic and biomass technology, which is applied in the direction of raw material separation, non-woody plant/crop pulp, pulping with organic solvents, etc., can solve the problems of undiscovered industrial application fields, increase the effective specific surface area, reduce Production cost, effect of promoting degradation
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[0024] Example 1:
[0025] The method for selectively separating lignin and cellulose from lignocellulosic biomass includes the following steps:
[0026] a. Pretreatment of lignocellulosic biomass: crush the sesame straw, pass through a 180-mesh sieve, dry it in an oven at 105°C for 60 minutes, and then puff to obtain sesame straw particles for later use;
[0027] b. The dissolution of lignocellulose and the degradation of biomass: Weigh 15g of ionic liquid 1-butyl-3-methylimidazole chloride salt into a 50mL flask, place it in a 104℃ oil bath to heat and melt, and stir the ions Liquid and add 2.5g of sesame straw pellets to it, seal the flask, control the temperature at 90℃, keep stirring and heating for 2h to obtain a viscous substance;
[0028] Add 10% dilute hydrochloric acid dropwise while stirring to the viscous material obtained above, adjust the pH to 4.5, and continue heating and stirring for 5 hours to obtain a reaction slurry;
[0029] c. Extraction and separation: After cool...
Example Embodiment
[0038] Example 2:
[0039] The method for selectively separating lignin and cellulose from lignocellulosic biomass includes the following steps:
[0040] a. Pretreatment of lignocellulosic biomass: crush corn stalks, pass through a 180-mesh sieve, dry them in an oven at 80°C for 60 minutes, and then puff to obtain corn stalk particles for use;
[0041] b. Dissolution of lignocellulose and degradation of biomass: Weigh 15g of ionic liquid 1-butyl-3-methylimidazole chloride salt into a 100mL flask, place it in a 95°C oil bath to heat and melt, and stir the ions Liquid and add 2.5g corn stalk pellets to it, seal the flask, control the temperature at 110°C, keep stirring and heating for 3 hours to obtain a viscous substance;
[0042] Add 5% dilute hydrochloric acid dropwise while stirring to the viscous material obtained above, adjust the pH to 4.8, and continue heating and stirring for 7 hours to obtain a reaction slurry;
[0043] c. Extraction and separation: After cooling the reaction s...
Example Embodiment
[0045] Example 3:
[0046] The method for selectively separating lignin and cellulose from lignocellulosic biomass includes the following steps:
[0047] a. Pretreatment of lignocellulosic biomass: crush the peanut shells, pass through a 180-mesh sieve, dry them in an oven at 110°C for 90 minutes, and then puff to obtain peanut shell particles for use;
[0048] b. The dissolution of lignocellulose and the degradation of biomass: Weigh 50g of ionic liquid 1-butyl-3-methylimidazole chloride salt into a 500mL flask, place it in a 110°C oil bath to heat and melt, and stir the ions Add 20g of peanut shell particles to the liquid, seal the flask, control the temperature at 90℃, and keep stirring and heating for 2.5 hours to obtain a viscous substance;
[0049] Add 8% dilute hydrochloric acid dropwise while stirring to the viscous material obtained above, adjust the pH to 4.5, and continue heating and stirring for 5 hours to obtain a reaction slurry;
[0050] d. Extraction and separation: Aft...
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