Method for extracting procyanidine by using pine bark

Abstract

The invention discloses a method for extracting procyanidine by using pine bark, which comprises the following steps: taking the endodermis of pine bark as a raw material, and adding water which is 10-20 times of the weight of the raw material for extraction to obtain an extracting solution; keeping the extracting solution at the temperature of 50 DEG C to 70 DEG C for 1-2 hours, centrifuging theextracting solution, and removing fine particles and residues to obtain centrifugate; standing the centrifugate for 2-4h to obtain a clarified extracting solution; slowly feeding the clarified extracting solution into a macroporous resin column, carrying out selective adsorption, flushing the resin with purified water or deionized water, discharging impurities, and carrying out hydrolytic washingwith 30-50% alcohol for 2-3 times, so as to obtain an alcohol eluent of procyanidine; further concentrating the eluent to obtain a concentrated solution with the percentage concentration of 11-18%; and drying the concentrated solution at 210-220 DEG C to obtain powdery procyanidine, and packaging the procyanidine after the procyanidine is inspected to be qualified. The process is simple and easy to operate, the raw material is the pine bark which is rich in resource and low in price, and the high additional value of the pine bark is fully developed while the production cost is reduced.

Description

technical field [0001] The invention relates to the field of preparation of proanthocyanidins, in particular to a method for extracting proanthocyanidins from pine bark. Background technique [0002] With the improvement of modern living standards and quality, people's health awareness is also increasing, proanthocyanidins with excellent physiological properties and functions have become a hot spot of concern. Because of its antioxidant, anti-inflammatory, antibacterial, anti-aging, anti-cancer and protective effects on cardiovascular, heart and vision, proanthocyanidins, as important health care products and therapeutic drugs, can be used to improve blood circulation and treat diabetic retina disease, reduce edema and inhibit varicose veins, etc. At the same time, proanthocyanidins also play an important role in animal husbandry as feed additives. Previous studies have shown that diarrhea in weaned piglets is mainly due to the insufficiency of the intestinal mucosal barri...

AI Technical Summary

Problems solved by technology

At present, some production processes are relatively backward, the process is more complicated, the consumption is large, the heat energy consumption is large, and the time is long; the above situation leads to high cost, and the rationality and scientificity of the process are not enough, which affects the quality of the product.

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