Process for extracting oxyresveratrol from mulberry twigs
A technology for oxidizing stilbene triphenols and mulberry branches, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of polluting the environment, resource value not being well developed, etc., and achieves a simple and suitable preparation process. Mass-produced, easy-to-handle effects
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Embodiment 1
[0027] A method for extracting oxystilbene from mulberry branches, which comprises the following steps carried out in sequence:
[0028] (1) Mulberry branches (Hunan, Huanglutou old branches, oxystilbene triphenol content 1.1‰) were dried in the shade (moisture content 10%), weighed 500kg of powder after crushing and sieving (40 mesh), 70% Extract with ethanol-water solution at room temperature for 3 times (4000L×1, 2500L×2, 12hr×3, solution circulation / stirring for 10min every 2hr), combine the 3 ethanol extracts, concentrate under vacuum at 55℃ to 100L fluid.
[0029] (2) After degreasing the 100L fluid obtained in step (1) with petroleum ether, extract it three times with ethyl acetate (100L×3), combine the three ethyl acetate extracts, and recover the solvent under vacuum to obtain a fluid substance, 30 After vacuum drying at ℃, 4.7 kg of solid powder was obtained, and the content of oxystilbene triphenol was measured to be 11.3%.
[0030] (3) Add 4.7 kg of the solid powd...
Embodiment 2
[0033] A method for extracting oxystilberol from mulberry branches, which is basically the same as in Example 1, except that the elution in steps (3) and (4) is isocratic segmental elution, with a concentration of 10% The difference is an interval section, the elution volume of each section is 2 column volumes, and the eluent flow rate is 1 column volume / hour. Finally, 510 g of oxystilbene triphenol crystals were obtained, and the content of oxystilbene triphenols was 96.97% as detected by HPLC.
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