Bizen Chemical Co., Ltd.

Q.p. Corporation

Keisuke Uryu

Yoshio Shimizu

Hideaki Kobayashi

Yoshihisa Misawa

Jun Fujii

Tetsuro Taira

Hiroyuki Sakaguchi

The present invention relates to the field of methods for purifying fatty acid ethyl esters. According to the present invention, a method for obtaining a &#x3c9;3 fatty acid ethyl ester, such as EPA and DHA, each as a high purity product at a high yield is provided. In the method according to the present invention, a raw material fat including EPA and DHA is treated with a lipolytic enzyme and ethyl-esterification is performed as needed; the treated substance is fractionated into a glyceride fraction and a free fatty acid fraction; a fraction comprising more EPA ester and a fraction comprising DHA ester are obtained from the respective fractions; the fraction comprising more EPA ester is purified to prepare a high-purity EPA ester; and the fraction comprising more DHA ester is purified to prepare a high-purity DHA ester.

Method for producing high purity omega-3 fatty acid ethyl ester

A method of obtaining a polyunsaturated fatty acid derivative comprises contacting a mixture of fatty acid derivatives with a silver salt aqueous solution, and adjusting the free fatty acid content in the silver salt aqueous solution to 0.2 meq or less per gram of silver when repeatedly using the silver salt aqueous solution. A polyunsaturated fatty acid derivative having high purity and excellent quality can thus be economically obtained.

Method for obtaining polyunsaturated fatty acid derivatives

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Akaiwa, Japan

Keisuke Uryu