Method for removing fishy smell of deep sea fish oil

A deep-sea fish oil and fishy smell technology, which is applied in the direction of edible oil/fat, fat oil/fat refining, fat production, etc., can solve the problems of unsuitable fish oil, short storage period, fishy smell, etc., to overcome the incomplete removal of fishy smell, Overcome high cost and save solvent

Inactive Publication Date: 2014-01-29
JIANGNAN UNIV +1
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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...

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  • Method for removing fishy smell of deep sea fish oil
  • Method for removing fishy smell of deep sea fish oil
  • Method for removing fishy smell of deep sea fish oil

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Embodiment 1

[0028] After degumming, deacidification, decolorization and deodorization, the refined deep-sea fish oil with 19% EPA and DHA content is put into the hydrogenation reactor, 0.2% by mass nickel catalyst is added, and the reaction is performed at a reaction temperature of 160°C and 0.3MPa React under pressure and stirring rate of 400r / min for 30 minutes to obtain lightly hydrogenated deep-sea fish oil; after the reaction, the lightly hydrogenated fish oil will be decolorized at 80°C for 30 minutes with 3% by mass activated clay and molecular distillation. Deodorized fish oil products that are completely odorless, and the content of EPA and DHA is determined to be 17%, see figure 1 .

Embodiment 2

[0030] After degumming, deacidification, decolorization and deodorization, the refined deep-sea fish oil with 18% EPA and DHA content is charged into the hydrogenation reactor, and 0.3% nickel catalyst is added. The reaction temperature is 160℃, the reaction pressure is 0.2MPa and 500r. The reaction was carried out for 30 minutes at a stirring rate of 1 / min to obtain lightly hydrogenated deep-sea fish oil; after the reaction, the lightly hydrogenated fish oil was decolorized at 110°C for 30 minutes by removing the catalyst and 3% by mass of activated clay, and molecular distillation was deodorized. The fish oil product is completely odorless, and the content of EPA and DHA is determined to be 15%, see figure 2 .

[0031] Sensory evaluation: The prepared deep-sea fish oil was evaluated for fishy odor according to the scoring standard in Table 1. Two control groups were set up, one was the deep-sea fish oil treated according to the present invention, and the other was not treated ...

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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...

Claims

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Application Information

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IPC IPC(8): C11C3/12C11B3/10A23D9/04
Inventor 金青哲张伟王兴国谢丹金俊
Owner JIANGNAN UNIV
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