A kind of method for preparing water-soluble chitosan oligosaccharide
A technology for water-soluble chitosan oligosaccharide and chitosan, applied in the preparation of sugar derivatives, chemical instruments and methods, amino sugars, etc., can solve the problems of waste of raw materials, high risk, incomplete degradation process, etc. Cost, shortened irradiation time, complete effect of microwave degradation
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Embodiment 1
[0014] Soak 1 kg of raw material polymer chitosan in pure water for 6 hours after preliminary treatment to form 1000 ml of chitosan and pure water mixture, and then place the soaked mixture on a microwave generator for tunnel-type continuous microwave Treatment can ensure that the soaked chitosan is subjected to uniform microwave radiation, wherein the time of microwave radiation is 5min, and the temperature of microwave radiation is 130°C; the solution obtained after microwave radiation is degraded with 3000ml of food-grade hydrogen peroxide. Distilled water is added during the degradation process of food-grade hydrogen peroxide. After the reaction is complete, nano-membrane filtration separates the crude chitosan oligosaccharide and the filtrate with low molecular weight. The obtained filtrate can be sent to the soaking process for reuse; the crude chitosan oligosaccharide is washed with pure water to remove impurities , high-speed centrifugation and concentration of the wash...
Embodiment 2
[0016] Soak 1 kg of raw material polymer chitosan in pure water for 8 hours after preliminary treatment to form 1000 ml of chitosan and pure water mixture, and then place the soaked mixture on a microwave generator for continuous tunneling. Microwave treatment can ensure that the soaked chitosan is subjected to uniform microwave radiation. The time of microwave radiation is 30 minutes, and the temperature of microwave radiation is 120°C; the solution obtained after microwave radiation is degraded with 2500ml of food-grade hydrogen peroxide. , Distilled water was added during the degradation process of food-grade hydrogen peroxide. After the reaction was complete, the crude chitosan oligosaccharide and the filtrate with low molecular weight were separated by nano-membrane filtration. The obtained filtrate could be sent to the soaking process for reuse; the crude chitosan oligosaccharide was removed by washing with pure water Impurities, high-speed centrifugation and concentratio...
Embodiment 3
[0018] Soak 1 kg of raw material polymer chitosan in pure water for 10 hours after preliminary treatment to form 1000 ml of chitosan and pure water mixture, and then place the soaked mixture on a microwave generator for continuous tunneling. Microwave treatment can ensure that the soaked chitosan is subjected to uniform microwave radiation. The time of microwave radiation is 60 minutes, and the temperature of microwave radiation is 100°C; the solution obtained after microwave radiation is degraded with 2000ml of food-grade hydrogen peroxide. , Distilled water is added during the degradation process of food-grade hydrogen peroxide. After the reaction is complete, the crude chitosan oligosaccharide with low molecular weight and the filtrate are separated by nano-membrane filtration. The obtained filtrate can be sent to the soaking process for reuse; the crude chitosan oligosaccharide is washed with pure water Remove impurities, centrifuge and concentrate the washed solution at hi...
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