| abstract |
The invention discloses a method for preparing ellagic acid by utilizing tara tannin, which comprises the following steps: under the action of a jet pump, the tara tannin reaction solution is repeatedly mixed with air to carry out oxidation reaction to prepare ellagic acid. Purifying or/and refining the crude ellagic acid obtained by oxidation treatment to obtain high-purity refined ellagic acid. The ellagic acid prepared by the method of the invention has high yield and high purity, and the thermal stability of ellagic acid is improved. Over time, the purity of ellagic acid is significantly improved, the production efficiency of industrial production of ellagic acid is significantly improved, it is suitable for industrial large-scale production of ellagic acid, and the application of ellagic acid in the fields of medicine and cosmetics is broadened. |