Method for preparing fatty acid ethyl ester with Omega-3 content of more than 90 percent

Abstract

The invention discloses a method for preparing a fatty acid ethyl ester with Omega-3 content of more than 90 percent by taking fish oil as a raw material. According to the method, the fish oil serves as a raw material, and the method sequentially comprises the following steps of: removing free fatty acids through molecular distillation prepurification; performing twice transesterification reactions on fish oil and ethanol to prepare fatty acid ethyl ester by taking sodium ethoxide as a catalyst; performing primary purification on the fatty acid ethyl ester through molecular distillation; performing secondary purification on the fatty acid ethyl ester through a urea inclusion technology; purifying and discoloring the fatty acid ethyl ester subjected to urea inclusion through molecular distillation; performing activated clay adsorption and reducing the peroxide value; and removing anisidine from a sodium hydroxide ethanol solution, so that the fatty acid ethyl ester with Omega-3 content of more than 90 percent is obtained. The method has the beneficial effects that a production method which is not used in China at present is provided; and according to the method, the fatty acid ethyl ester product with Omega-3 content of more than 90 percent is produced. The fatty acid ethyl ester obtained by the method has the Omega-3 ethyl ester content of more than 90 percent, and each quality standard accords with the standards of European pharmacopoeia and United States pharmacopeia; and moreover, the fatty acid ethyl ester can be used for nutritious supplementary, medicines, foods and food additives and is high in economic value.

Description

technical field [0001] The invention belongs to the field of food health products, and in particular relates to a method for preparing fatty acid ethyl esters with Omega-3 greater than 90% by using fish oil as a raw material. [0002] Background technique [0003] Omega-3 fatty acids are also ω-3 fatty acids, n-3 fatty acids, which are polyunsaturated fatty acids containing multiple double bonds, because the first double bond appears at the third position of the methyl end of the carbon chain, so it is called For n-3 fatty acids. [0004] Omega-3 fatty acid is a kind of polyunsaturated fatty acid, which has rich nutritional value. Some data show that: with the public's awareness and understanding of Omega-3 fatty acids, the Omega-3 market is developing rapidly. Whether it is food added with Omega-3 or food containing Omega-3 fatty acids, it is gradually becoming a health-conscious product. The preferred choice of consumers, foods with high Omega-3 content are expected to ...

AI Technical Summary

Problems solved by technology

[0007] For solving above technical problem, the present invention provides a kind of method that is raw material preparation Omega-3 fatty acid ethyl ester that is greater than 90% with crude fish oil, and beneficial effect is mainly embodied in, provides a kind of production method that does not adopt at present domestically, uses this The method can produce fatty acid ethyl ester products with an Omega-3 content greater than 90%, and at the same time overcomes the problems of high cost, serious environmental pollution, difficult to handle by-products, complicated methods, time-consuming, and difficult to guarantee safety in the prior art.