Normal atmosphere degreasing crude glycerine pretreatment method for separating wood fiber biomass components
A lignocellulosic and lignocellulosic technology, which is applied in the field of separation and classification of lignocellulosic biomass components
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Embodiment 1
[0020] Put corn stalks with a length of 10-20mm and a weight of 10g into a digester, add 300g of a 40% concentration of degreased glycerin solution, stir evenly, and heat up under atmospheric pressure in a digester with a power of 800-1500W. The heating time is 60-150min. After the temperature was raised to 210°C and heat-preserved for 4 hours, the autocatalytic pretreatment process of glycerin was basically completed, resulting in a large amount of lignin-hemicellulose complexes peeling off from the cellulose and dissolved in the glycerol solution. When cooling down to 180-120°C, add 200ml of 30-60% circulating glycerin aqueous solution, fully dissolve and stir to continue cooling down to 60-80°C, so that the hemicellulose and lignin peeled off from the cellulose are fully dissolved in the glycerin solution middle.
[0021] Separation of cellulose: after cooling, carry out solid-liquid separation, use G 3 Sand core funnel carries out vacuum suction filtration, with 400ml te...
Embodiment 2
[0026] Put rice straw with a length of 10-20mm and a weight of 10g into a digester, add 300g of a 60% concentration of degreased glycerin solution, stir evenly, autocatalyze glycerin under atmospheric pressure, and heat up in a digester with a power of 800-1500W To 260°C, the heating time is 60-90min. After raising the temperature to 260°C and cooking for 4 hours, the glycerin treatment process was basically completed, causing a large amount of lignin-hemicellulose complexes to peel off from the cellulose and dissolve in the glycerol solution, which also led to the degradation of part of the cellulose. When cooling down to 180-120°C, add 200ml of 30-60% circulating glycerin aqueous solution, fully dissolve and stir to continue cooling down to 60-80°C, so that the hemicellulose and lignin peeled off from the cellulose are fully dissolved in the glycerin solution middle.
[0027] Separation of cellulose: after cooling, carry out solid-liquid separation, use G 3 Sand core funne...
Embodiment 3
[0032] Put wheat straw with a length of 10-20mm and a weight of 10g into a digester, add 200g of 80% degreased glycerin solution, stir evenly, and heat up in a digester with a power of 800-1500W through glycerin autocatalysis under atmospheric pressure , The heating time is 60-90min. After raising the temperature to 240°C and cooking for 2 hours, the glycerol treatment process was completed, causing a large amount of lignin-hemicellulose complexes to peel off from the cellulose and dissolve in the glycerin solution. When cooling down to 180-120°C, add 200ml of 30-60% circulating glycerin aqueous solution, fully dissolve and stir to continue cooling down to 60-80°C, so that the hemicellulose and lignin peeled off from the cellulose are fully dissolved in the glycerin solution middle.
[0033] Separation of cellulose: after cooling, carry out solid-liquid separation, use G 3 Sand core funnel carries out vacuum suction filtration, with 400ml temperature is 40-80 ℃, concentratio...
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