1. The use of supercritical extraction is efficient and environmentally friendly, with minimal impurities in the extract, and good control of pesticide residues and heavy metals.
2. Using molecular distillation to further increase the content and effectively remove impurities such as tannins and pigments, effectively retaining effective components.
3. Using resin chromatography for separation only involves ethanol and water, making it more low toxicity and efficient. Organic solvents such as petroleum ether and dichloromethane are more conducive to environmental safety and personnel health.
4. The crystallization system excels in controlling various impurity indicators.