Preparation method of oxidized bagasse xylan
A technology of xylan and bagasse, which is applied in the field of preparation of oxidized bagasse xylan, can solve the problems of low oxidation depth and affecting product performance, and achieve high oxidation depth, improved hydrophobicity, high crystallinity and crystallization area Effect
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[0030] Example 1:
[0031] (1) Dry bagasse xylan in a vacuum oven at 60°C to constant weight to obtain powdery dry basis bagasse xylan.
[0032] (2) Add 10 g of powdered dry-based bagasse xylan and 22 g of analytically pure acetone obtained in step (1) into the reactor to prepare a xylan suspension with a mass fraction of 32%.
[0033] (3) Weigh 0.4g of sodium hydroxide and dissolve it in 7.5mL of deionized water, then add it into the xylan suspension obtained in step (2), stir and activate for 1 hour.
[0034] (4) Dissolve 0.2g of potassium permanganate in 10 mL of deionized water and add to the material obtained in step (3), then add 0.3g of catalyst nickel sulfate, control the reaction temperature of the system to 55°C, and carry out the oxidation reaction under stirring. Add 1 mL of 5% sodium hydroxide solution every 20 minutes to maintain the pH of the system at 9, and react for 4 hours until the system changes from purple to brown.
[0035] (5) Add concentrated sulfuri...
Example Embodiment
[0040] Example 2:
[0041] (1) Dry bagasse xylan in a vacuum oven at 60°C to constant weight to obtain powdery dry basis bagasse xylan.
[0042] (2) Add 13g of powdered dry-based bagasse xylan and 24g of analytically pure acetone obtained in step (1) into the reactor to prepare a xylan suspension with a mass fraction of 35%.
[0043] (3) Weigh 0.5g of sodium hydroxide and dissolve it in 10mL of deionized water, then add it into the xylan suspension obtained in step (2), stir and activate for 1 hour.
[0044] (4) Dissolve 0.4g of potassium permanganate in 15 mL of deionized water and add it to the material obtained in step (3), then add 0.2g of catalyst nickel sulfate, control the reaction temperature of the system at 60°C, and carry out the oxidation reaction under stirring; Add 1 mL of 10% sodium hydroxide solution in 20 minutes to maintain the pH of the system at 10, and react for 5 hours until the system changes from purple to brown.
[0045] (5) Add concentrated sulfuric...
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