Combined extraction and purification technique for multiple active ingredients of polygonum multiflorum
A technology of combined extraction and active ingredients, applied in quinone separation/purification, organic chemistry, chemical instruments and methods, etc., can solve the problems of high cost, difficulty in large-scale preparation, low utilization rate of extraction solvent, etc., and achieve environmental friendliness and high purity Effect
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Embodiment 1
[0013] Polygonum multiflorum was crushed into 70-mesh particles, 80% ethanol was added according to the ratio of 1g Polygonum multiflorum to 14mL, and extracted under reflux at 42°C with 1kW ultrasonic power for 2h. The extraction rates of stilbene glycosides, emodin and chrysophanol were 90.6%, 88.2% and 86.4%, respectively. The extract was filtered, the residue was washed once with ethanol, and the wash was combined into the extract. Concentrating the extract under reduced pressure at a temperature of 40°C into a thick paste and recovering the extraction solvent, the stilbene glycosides, emodin and chrysophanol can be concentrated into the thick paste without loss. Dissolve the thick paste with 8 times the volume of distilled water and filter, and the filter residue is set aside. The filtrate was concentrated under reduced pressure to 1 / 6 of the original volume, which was the crude stilbene glycoside. Add 10 mL of ether to the filter residue of the water extract to dissolv...
Embodiment 2
[0015] Polygonum multiflorum was crushed into 80 mesh particles, 80% ethanol was added according to the ratio of 1g Polygonum multiflorum to 12mL, and extracted under reflux at 40°C with 1kW ultrasonic power for 2.2h. The extraction rates of stilbene glycosides, emodin and chrysophanol were 91.2%, 88.3% and 85.7%, respectively. The extract was filtered, the residue was washed once with ethanol, and the wash was combined into the extract. Concentrating the extract under reduced pressure at a temperature of 45°C to a thick paste and recovering the extraction solvent, the stilbene glycosides, emodin and chrysophanol can be concentrated into the thick paste without loss. Dissolve the thick paste with 10 times the volume of distilled water and filter, and filter the residue for later use. The filtrate was concentrated under reduced pressure to 1 / 4 of the original volume, which was the crude stilbene glycoside. Add 8 mL of ether to the filter residue of the water extract to dissol...
Embodiment 3
[0017] Polygonum multiflorum was crushed into 80-mesh particles, 80% ethanol was added according to the ratio of 1g Polygonum multiflorum to 10mL, and reflux extraction was carried out at 38°C with 1kW ultrasonic power for 1.8h. The extraction rates of stilbene glycosides, emodin and chrysophanol were 88.3%, 86.7% and 84.3%, respectively. The extract was filtered, the residue was washed once with ethanol, and the wash was combined into the extract. Concentrating the extract under reduced pressure at a temperature of 50°C into a thick paste and recovering the extraction solvent, the stilbene glycosides, emodin and chrysophanol can be concentrated into the thick paste without loss. Dissolve the thick paste with 9 times the volume of distilled water and filter, and the filter residue is set aside. The filtrate was concentrated under reduced pressure to 1 / 5 of the original volume, which was the crude stilbene glycoside. Add 9 mL of ether to the filter residue of the water extrac...
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