Process for extracting proanthocyanidin from grape seed by super critical carbon dioxide
A proanthocyanidin and carbon dioxide technology, which is applied in the production of organic chemistry and bulk chemicals, can solve the problems of residual solvent energy consumption, long production cycle and large solvent consumption in products, and achieves reduction of entrainer dosage, high yield and content. , The effect of shortening the production cycle
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example 1
[0008] Example 1 Weigh 12.0 g of grape seed extract after oil removal and mix it with 12 mL of absolute ethanol, then put it into the extraction kettle, the temperature of the extraction kettle is 55 ° C, the pressure is 50 MPa, CO 2 Enter the extraction kettle through a high-pressure pump to ensure a 30-min extraction retention time, and then turn on the dynamic entrainer pump to continuously send absolute ethanol into the extraction kettle. The flow rate of the entrainer is 80mL / h, and the material is continuously discharged at the same time. The pressure of the first-stage separation tank is 10MPa. The temperature is 45°C, the pressure of the secondary separation tank is 5MPa, the temperature is 35°C, and the extraction time of the whole process is 1 hour. The obtained mixed solvent of proanthocyanidin and ethanol was evaporated and dried to obtain 1.9 g of proanthocyanidin product with a yield of 14.75%. The content of proanthocyanidin was 95.14% according to ultraviolet sp...
example 2
[0009] Example 2 Weigh 352g of the grape seed extract after oil removal and mix it with 535mL of absolute ethanol, then put it into the extraction kettle, the temperature of the extraction kettle is 45°C, the pressure is 40MPa, CO 2 Enter the extraction kettle through a high-pressure pump to ensure a 90min extraction retention time, and then turn on the dynamic entrainer pump to continuously send absolute ethanol into the extraction kettle. The flow rate of the entrainer is 120mL / h, and the material is continuously discharged at the same time. The pressure of the first-stage separation tank is 8MPa. The temperature is 45°C, the pressure of the secondary separation tank is 4MPa, the temperature is 35°C, and the extraction time of the whole process is 0.5 hours. The obtained proanthocyanidin and ethanol mixed solvent was evaporated and dried to obtain 51.5 g of proanthocyanidin product with a yield of 14.23%, and the proanthocyanidin content was 97.21% according to ultraviolet sp...
example 3
[0010] Example 3 Weigh 249g of the oil-removed grape seed extract and mix it with 440mL of absolute ethanol, then put it into the extraction kettle, the temperature of the extraction kettle is 35°C, the pressure is 30MPa, CO 2 Enter the extraction kettle through a high-pressure pump to ensure a 60-min extraction retention time, and then turn on the dynamic entrainer pump to continuously send absolute ethanol into the extraction kettle. The flow rate of the entrainer is 100mL / h, and the material is continuously discharged at the same time. The pressure of the first-stage separation tank is 6MPa. The temperature is 45°C, the pressure of the secondary separation tank is 5MPa, the temperature is 35°C, and the extraction time of the whole process is 0.5 hours. The obtained mixed solvent of proanthocyanidin and ethanol was evaporated and dried to obtain 34.0 g of proanthocyanidin product with a yield of 13.50%, and the content of proanthocyanidin was 98.91% according to ultraviolet s...
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