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Method for reducing anisidine value of high-content fish oil

A kind of technology of anisidine value and fish oil, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc. It can solve the problems of ineffective reduction of fish oil, cumbersome process, high energy consumption, etc.

Active Publication Date: 2014-11-05
SICHUAN GOWELL PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the fact that the existing technology cannot effectively reduce the oxidation products in fish oil, resulting in heavy fishy smell, poor oxidation stability and short storage period, and the existing technologies for reducing anisidine value or decolorization and deodorization have cumbersome processes, high energy consumption and low product quality. Low yield and other problems, the present invention provides the following technical solutions:

Method used

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  • Method for reducing anisidine value of high-content fish oil
  • Method for reducing anisidine value of high-content fish oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Under nitrogen protection, take 3.00kg of fish oil with an AV value of 14.7 and a total content of EPA and DHA of 60%, add 15g of attapulgite, mix well, heat to 85°C, absorb for 20min, filter out the adsorbent, and obtain 2.52kg of fish oil .

[0085] Pour the fish oil after adsorption treatment into the feed liquid tank of the wiped-film molecular still (XT-200 type), carry out molecular distillation at 105°C and 10Pa, the feeding rate is 3±0.5kg / h, and the scraping film rate is 110r / min , to obtain 2.01 kg of concentrate.

[0086] Within 24 hours after the molecular distillation was completed, under the protection of nitrogen, 300g of activated clay and 102g of activated carbon were added to the above concentrate, mixed evenly, heated to 85°C, adsorbed for 10min, and filtered off the adsorbent to obtain 1.57kg of the product.

Embodiment 2

[0088] Under the protection of nitrogen, take 3.00kg of fish oil with an AV value of 14.8 and a total content of EPA and DHA of 84%, add 300g of diatomaceous earth and 300g of activated carbon, mix well, heat to 60°C, absorb for 15min, and filter out the adsorbent to obtain Fish oil 1.82kg.

[0089] Pour the fish oil after adsorption treatment into the feed liquid tank of the wiped film molecular still (XT-200 type), carry out molecular distillation at 85°C and 7Pa, the feed rate is 3±0.5kg / h, and the film scraping rate is 130r / min , to obtain 1.54kg of concentrate.

[0090] Within 24 hours after molecular distillation was completed, under the protection of nitrogen, 7.7g of activated alumina was added to the above concentrate, mixed evenly, heated to 50°C, adsorbed for 30min, and filtered off the adsorbent to obtain 1.48kg of the product.

Embodiment 3

[0092] Under nitrogen protection, take 3.00kg of fish oil with an AV value of 13.4 and a total content of EPA and DHA of 72%, add 450g of silica gel, mix well, absorb at 5°C for 20min, and filter out the adsorbent to obtain 2.12kg of fish oil.

[0093] Pour the fish oil after adsorption treatment into the feed liquid tank of the wiped film molecular still (XT-200 type), carry out molecular distillation at 60°C and 8Pa, the feed rate is 3±0.5kg / h, and the film scraping rate is 120r / min , to obtain 1.78kg of concentrate.

[0094] Within 24 hours after molecular distillation was completed, under the protection of nitrogen, 53.4 g of bentonite was added to the above concentrate, mixed evenly, adsorbed at 5°C for 25 min, and the adsorbent was filtered off to obtain 1.69 kg of the product.

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Abstract

The invention relates to a method for reducing the anisidine value of high-content fish oil. The method comprises the following steps of: adsorbing the fish oil for the first time by using an adsorbent in the presence of inert gases and at the temperature of 5-85 DEG C; carrying out molecular distillation on the adsorbent filtered fish oil; then, adsorbing the fish oil for the second time by using the adsorbent in the presence of the inert gas and at the temperature of 5-85 DEG C, wherein the usage amount of the adsorbent is 0.5-20% and preferably 1-10% of the weight of the fish oil treated through adsorption every time. By using the fish oil treating method provided by the invention, the anisidine value of the high-content fish oil can be reduced to the level as low as possible, and a fish oil product which has no stench and better oxidation stability; the method is simple and convenient in operation, high in yield, low in energy consumption and suitable for industrial production.

Description

technical field [0001] The invention relates to a fish oil processing method, in particular to a method for reducing the anisidine value of high-content fish oil. Background technique [0002] The omega-3 polyunsaturated fatty acid (PUFA) in fish oil is a physiologically active substance that has a significant impact on human health and intellectual development. Its main components are eicosapentaenoic acid (EPA) and docosahexaene DHA has many functions such as inhibiting platelet aggregation, anti-thrombosis, relaxing blood vessels, regulating blood lipids, strengthening brain and intelligence, anti-cancer, anti-inflammation, etc. Therefore, high-content fish oil rich in EPA and DHA has very important nutrition and medicinal value. However, due to the unsaturated structural characteristics of PUFA, it is easy to undergo oxidation reaction during processing and storage to form hydroperoxide (first-order oxidation product). Hydroperoxide is very unstable and can be further d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/10C11B1/14
Inventor 苏诚郭礼新郭晖左长英何彪毛惠英
Owner SICHUAN GOWELL PHARMA
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