Method for preparing L-arabinose
A technology of arabinose and amylase, which is applied in the field of preparation of L-arabinose, can solve the problems of unrefined purification, high production cost, and low production efficiency, and achieve the effects of reducing the difficulty of filtration, reducing the content, and improving production efficiency
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Embodiment 1
[0027] Embodiment 1, prepare L-arabinose with the method of the present invention
[0028] Take by weighing 100kg of corn bran after pulverizing, add water and allocate to 5% corn bran material, add 2kg amylase (amylase is made up of α-amylase and β-amylase that the weight and number ratio is 1: 1), 35 Stir the reaction at ℃ for 12h, and filter by centrifugation. The filter cake is washed 2-3 times with water, and the water consumption for each washing is 200L. Add 2000L 1.5% sulfuric acid solution to the reaction kettle containing the above filter cake, reflux at 100°C for 4 hours, stop the reaction, adjust the pH of the reaction solution to 4.5 with calcium carbonate with a pH value of 7, filter, and use 200L 2% ammonia water Wash the filter cake 2 times. Combine the filtrates, add activated carbon with a mass percentage of 1% of the filtrate, decolorize at 100°C for 45 minutes, and filter with a plate frame. The obtained filtrate is passed through 732 cation exchange res...
Embodiment 2
[0029] Embodiment 2, prepare L-arabinose with the method of the present invention
[0030] Take by weighing 150kg of corn bran after pulverizing, add water and allocate into 4% corn bran material, add 2kg amylase (amylase is made up of α-amylase and β-amylase that the weight and number ratio is 0.5: 1), 45 Stir the reaction at ℃ for 8h, and filter by centrifugation. The filter cake is washed 2-3 times with water, and the water consumption for each washing is 220L. Add 2500L 1% hydrochloric acid solution to the reaction kettle containing the above filter cake, reflux at 110°C for 8 hours, stop the reaction, adjust the pH of the reaction solution to 3.5 with calcium hydroxide with a pH value of 8, filter, and use 250L 2% Wash the filter cake with ammonia water 2 times. Combine the filtrates. Add activated carbon with a mass percentage of 2% of the filtrate, decolorize at 105°C for 60 minutes, and filter with a plate and frame filter. The obtained filtrate is passed through 7...
Embodiment 3
[0031] Embodiment 3, prepare L-arabinose with the method of the present invention
[0032]Take by weighing 100kg of corn bran after pulverizing, add water and allocate to 6% corn bran material, add 3kg amylase (amylase is made up of α-amylase and β-amylase that the weight and number ratio is 1.5:1), 40 Stir the reaction at around ℃ for 12h, and filter by centrifugation. The filter cake is washed 2-3 times with water, and the water consumption for each washing is 200L. Add 2000L 5% acetic acid solution to the reaction kettle containing the above filter cake, reflux at 110°C for 6 hours, stop the reaction, adjust the pH of the reaction solution to 5.5 with sodium hydroxide with a pH value of 8, filter, and use 200L 2% Wash the filter cake with ammonia water 2 times. Combine the filtrates. Add activated carbon with a mass percentage of 1.5% of the filtrate, decolorize at 100°C for 90 minutes, and filter with a plate and frame filter. The obtained filtrate is passed through 73...
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