With the continuous deepening of research on resveratrol, the application of resveratrol in the pharmaceutical industry, especially the food industry, is becoming more and more extensive. High-component resveratrol will have high economic value and practical significance.
Resveratrol Market Trends
Resveratrol extracted from plants has been used as a functional food additive in Japan. Certain products in the United States and Canada are health supplements containing resveratrol. At present, more than 10 countries and regions in the world are developing resveratrol raw materials and preparations.
According to relevant statistics, the current global market demand for resveratrol is more than 100 tons. In the next few years, the demand will continue to increase. The current production capacity of resveratrol is about 50 to 60 tons. It can be seen that the demand gap is large and the market prospect is extremely broad.
Extraction Method
At present, the method of extracting resveratrol from Polygonum cuspidatum is mostly organic solvent extraction. The resveratrol is extracted from the raw material by its easy solubility in polar organic solvents (such as ethanol, ethyl acetate, acetone, dimethyl sulfoxide, etc.).
However, the crude product extracted by organic solvent contains a large amount of impurities such as plant polysaccharides, flavonoids, pigments, phenolic acids, and tartaric acid. This requires purification and purification in subsequent steps. And there are many processes, poor quality of finished products and other shortcomings.
Supercritical fluids have strong dissolving ability and good flow and transfer properties. Supercritical CO2 has the advantages of stable properties, non-flammable, non-toxic and non-polluting to the environment.
Aqueous two-phase extraction technology has low viscosity characteristics and easy solvent recovery. Applying to extract resveratrol from Polygonum cuspidatum can avoid the harm of more toxic organic solvents to the environment.