A method for reducing free fatty acid content in marine phospholipids

Abstract

The invention discloses a method for reducing the free fatty acid content in marine phospholipids. The method for reducing the content of free fatty acids in marine phospholipids includes the step of converting free polyunsaturated fatty acids containing three or more double bonds in crude marine phospholipids into phospholipids. The method for reducing the content of free fatty acids in marine phospholipids increases the content of phospholipids while reducing the acid value, and also ensures the content of polyunsaturated fatty acids such as EPA and DHA, reduces the loss of fat-soluble vitamins and other components, and has a high degree of separation , and will not destroy the structure of phospholipids, improving the quality of the product.

Description

technical field [0001] The invention relates to a method for reducing the content of free fatty acids in marine phospholipids. Background technique [0002] A large number of studies at home and abroad have confirmed that marine phospholipids have safe and reliable effects in the auxiliary treatment of cardiovascular and cerebrovascular diseases, diabetes, reducing arthritis symptoms, relieving menstrual syndrome and dysmenorrhea, and anti-oxidation. It has a good role in the development of functional nutritional food industry. Prospects. Studies have shown that marine phospholipids are rich in n-3 polyunsaturated fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), as well as rich in vitamin A, vitamin E, astaxanthin, etc. Fat-soluble ingredients, among which EPA and DHA are mostly combined with phospholipids through chemical bonds. In view of the influence of raw material freshness on product quality, the content of free fatty acids in general ...

AI Technical Summary

Problems solved by technology

[0003] At present, in the oil industry, there are mainly the following methods for removing free fatty acids: (1) Neutralization and deacidification method: This method uses sodium hydroxide to neutralize free fatty acids in oils to reduce the acid value, which will cause marine pollution. The saponification of phospholipids and glycerides in phospholipids, the sodium fatty acid produced by the neutralization reaction and saponification reaction as an emulsifier will emulsify the reaction system, resulting in difficulty in oil-water separation

(2) Molecular distillation method: This method relies on the difference in the mean free path of molecular motion of different substances to achieve material separation, but usually the temperature of molecular distillation is relatively high (mostly above 160°C), and continuous high temperature is easy to destroy the structure of functional phospholipids, so it is not applicable Deacidification of marine phospholipids

(3) Supercritical fluid extraction and deacidification method: Although this method has a certain effect, the equipment investment is large and the process cost is high. When removing free fatty acids, it will also remove fat-soluble vitamins and astaxanthin in marine phospholipids. and triglycerides

(4) Zhou Dayong of Dalian University of Technology and others have developed the deacidification method of acetone solvent. Although this method can also effectively reduce the free fatty acid content in marine phospholipids, it will also remove fat-soluble vitamins, astaxanthin and Triglyceride content, resulting in poor fluidity of marine phospholipids and loss of nutrients

In addition, since the free fatty acids of marine phospholipids also contain a certain amount of EPA and DHA, the above-mentioned various deacidification methods will also lead to the loss of n-3 polyunsaturated fatty acids