Method for separating high-purity hesperidin, neohesperidin, naringin and synephrine from fructus aurantii Immaturus
A new high-purity technology for neohesperidin, applied in chemical instruments and methods, preparation of organic compounds, preparation of sugar derivatives, etc., can solve the problem of low purity and yield of hesperidin, neohesperidin and synephrine , did not mention the separation method of naringin in Fructus Fructus Fructus Aurantium, the purity of the active ingredients in Fructus Fructus Fructus Fructus Fructus is not high, and achieved the effect of easy industrial production, simple operation and high purity
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Embodiment 1
[0025] This embodiment includes the following steps:
[0026] (1) Enzymatic hydrolysis: 100 kg of Citrus aurantium (10.50% hesperidin content, 8.31% neohesperidin content, 6.23% naringin content, and 1.55% synephrine content) are crushed, infiltrated with 350kg water, and 0.35kg is added. Pectinase, enzymatic hydrolysis for 24 hours; (2) Extraction: add 2800kg of water to the enzymatically hydrolyzed raw materials, extract at 80°C for 2.5 hours, filter and cool to obtain a water extract, and water extract residue for use; (3) membrane separation : Filter the water extract with a nanofiltration membrane with a molecular weight cut-off of 800 to obtain the permeate and the retentate; (4) Separation of synephrine: absorb the permeate of the nanofiltration membrane with an anionic resin, and use a 2.5bv concentration as 1% ammonia is hydrolyzed and absorbed, concentrated, and recrystallized with dichloromethane to obtain synephrine 1.39kg, purity 98.77wt%, yield 89.68%; (5) Separatio...
Embodiment 2
[0028] This embodiment includes the following steps:
[0029] (1) Enzymatic hydrolysis: 100 kg of Citrus aurantium (10.50% hesperidin content, 8.31% neohesperidin content, 6.23% naringin content, and 1.55% synephrine content) are crushed, infiltrated with 400 kg of water, and 0.2 kg is added Pectinase, enzymatic hydrolysis for 20 hours; (2) Extraction: add 2500kg of water to the raw materials after enzymatic hydrolysis, extract for 2 hours at 70°C, filter and cool to obtain water extract, water extract residue for later use; (3) membrane separation : Filter the water extract with a nanofiltration membrane with a molecular weight cut-off of 600 to obtain a permeate and a retentate; (4) Separation of synephrine: absorb the permeate from the nanofiltration membrane with an anionic resin and use 2bv with a concentration of 1.5 % Ammonia is hydrolyzed and absorbed, concentrated, and refined by recrystallization of petroleum ether to obtain synephrine 1.3kg, purity 98.65wt%, yield 83.8...
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