Fish oil purification Solution
Fish oil is rich in the highly unsaturated fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which have excellent physiological activity. They not only have the effects of lowering blood lipids, lowering blood pressure, inhibiting platelet aggregation, and reducing blood viscosity, but also have anti-inflammatory, anti-cancer, and immune enhancing effects. They are considered to be very promising natural medicines and functional foods.
EPA and DHA are mainly extracted from marine fish oil, and traditional separation methods are difficult to separate other high unsaturated fatty acids from DHA and EPA. In addition, the product has a heavy color, strong fishy smell, and high peroxide value, and further decolorization and deodorization are needed to make the product, with a recovery rate of only 16%.
Due to the similar average free path of impurity fatty acids in the material as EPA and DHA ethyl esters, the molecular distillation recovery rate can reach 70%. The product has good color, pure odor, low peroxide value, and can be divided into products with different ratios of DHA and EPA content.
Crude fish oil is esterified, washed, and dehydrated to obtain fish oil ethyl ester. After degassing and deodorizing through a thin film evaporator, the fish oil ethyl ester enters a four stage molecular distillation system to obtain 80% of the total monthly DHA and EPA products.
