Method for removing fishy smell of deep sea fish oil

Abstract

The invention discloses a method for removing fishy smell of deep sea fish oil. The method comprises the following steps: pretreating; lightly hydrotreating, wherein the hydrotreating is realized by feeding deep sea fish oil subjected to primary deodorization treatment in a hydrogenation kettle, adding a hydrogenation catalyst, and reacting under a reaction temperature, a reaction pressure and a stirring rate which are set to obtain lightly hydrotreated deep sea fish oil so that the purpose of removing the fishy smell is achieved within the range of EPA (Eicosapentaenoic Acid) and DHA (Docosahexaenoic Acid) contents which are reduced by 5; and performing the subsequent treatment to obtain a fish oil product which is free of fishy smell completely, wherein the subsequent treatment is realized by carrying out catalyst removal, decoloring and deodorizing on the obtained lightly hydrotreated fish oil. The method is suitable for the industrialized continuous production, and a solvent is saved.

Description

Technical field [0001] The invention relates to a method for removing the fishy smell of deep-sea fish oil, in particular to a method for removing the fishy smell of deep-sea fish oil by mild hydrogenation. Background technique [0002] Deep-sea fish oil is rich in highly unsaturated fatty acids with important physiological activities, which is very different from other vegetable oils. Among them, it is rich in anti-thrombotic EPA and DHA called brain gold. And because it is rich in highly unsaturated fatty acids, refined deep-sea fish oil is prone to oxidation to produce a fishy smell. At present, there is no better method to produce a kind of odorless deep-sea fish oil. [0003] In 2010, Wen Shaoqiang and others published "A fishy-free deep-sea fish oil and its preparation method and application" (Patent Application No. CN201010226875.5). Although the fishy smell of the deep-sea fish oil treated by this method has become lighter, it cannot be completely removed. , And the proc...

AI Technical Summary

Problems solved by technology

And precisely because of its high unsaturated fatty acids, refined deep-sea fish oil is easy to oxidize and produce fishy smell

There is still a lack of better means to produce a deep-sea fish oil without a fishy smell

[0003] In 2010, Wen Shaoqiang and others disclosed "A No-Odor Deep Sea Fish Oil and Its Preparation Method and Application" (Patent Application No. CN201010226875.5). Although the fishy smell of deep sea fish oil treated by this method became lighter, it could not be completely removed , and the processed deep-sea fish oil has a shorter shelf life even though it is compounded with antioxidants

[0004] In 2011, Ning Haiyin and others disclosed "A Method for Deodorizing Crocodile Oil" (patent application number CN201110218057.5). This method uses a silica gel-Chinese herbal medicine mixed column to remove the fishy smell, but the cost is high and it is not suitable for cooking. fish oil

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