A process for preparing l-arabinose with pea peel as raw material and by-product xylose
A technology for arabinose and pea skin, which is applied in the field of functional sugar preparation, can solve the problems of high production cost restricting l-arabinose, difficulty in direct crystallization, complicated process procedures, etc., so as to reduce the subsequent processing load and avoid ingestion. , the effect of reducing environmental pollution
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Embodiment 1
[0025] 1) Take 100g of pea peel raw material, add 2000g of purified water, and cook in a cooking pot at 90°C for 60min; filter the pretreatment mixture, pour out the filtrate, and obtain 92.6g of filter residue;
[0026] 2) Preparation of l-arabinose solution: add 1000 g of dilute sulfuric acid solution with a mass concentration of 0.5% to 92.6 g of the filter residue obtained above, perform hydrolysis in a cooking pot at 120°C for 120 minutes, and filter to obtain a hydrolyzed solution with a high content of l-arabinose Liquid 960ml, obtain hydrolysis residue 74.08g, wherein the reducing sugar yield of hydrolyzate is 20.5%, the yield of l-arabinose is 12.1%.
[0027] 3) Pass the hydrolyzate through the sugar-acid separation membrane to obtain 610ml of acid solution and 330ml of sugar solution. The acid solution is recovered for use. The sugar solution is decolorized by activated carbon-ultrafiltration-demineralization-refined to obtain a sugar solution rich in l-arabinose.
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Embodiment 2
[0032] 1) Take 100g of pea peel raw material, add 1600g of purified water, and cook in a cooking pot at 90°C for 60min; filter the pretreatment mixture, pour out the filtrate, and obtain 89.61g of filter residue;
[0033] 2) Preparation of l-arabinose solution: Add 1000 g of dilute sulfuric acid solution with a mass concentration of 0.4% to 89.61 g of the filter residue obtained above, perform hydrolysis in a cooking pot at 120°C for 120 minutes, and filter to obtain a hydrolyzed solution with a high content of l-arabinose Liquid 966ml, obtain hydrolysis residue 70.68g, wherein the reducing sugar yield of hydrolyzate is 23.50%, the yield of l-arabinose is 14.28%.
[0034] 3) Pass the hydrolyzate through the sugar-acid separation membrane to obtain 602ml of acid solution and 356ml of sugar solution. The acid solution is recovered for use. The sugar solution is decolorized by activated carbon-ultrafiltration-demineralization-refined to obtain a sugar solution rich in l-arabinose....
Embodiment 3
[0039] 1) Take 100g of pea peel raw material, add 1800g of purified water, and cook in a cooking pot at 100°C for 30min; filter the pretreatment mixture, pour out the filtrate, and obtain 90.25g of filter residue;
[0040] 2) Preparation of l-arabinose liquid: add 1000 g of dilute hydrochloric acid solution with a mass concentration of 0.3% to 90.25 g of the filter residue obtained above, carry out hydrolysis in a cooking pot at 115°C for 120 minutes, and filter to obtain a hydrolyzed solution with a high content of l-arabinose Liquid 948ml, obtain hydrolysis residue 70.39g, wherein the reducing sugar yield of hydrolyzate is 22.36%, the yield of l-arabinose is 13.68%.
[0041] 3) Pass the hydrolyzate through the sugar-acid separation membrane to obtain 600ml of acid solution and 336ml of sugar solution. The acid solution is recovered for use. The sugar solution is decolorized by activated carbon-ultrafiltration-demineralization-refined to obtain a sugar solution rich in l-arabi...
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