A kind of ethyl ester type fish oil refining process

Abstract

The invention relates to an ethyl ester type fish oil refining and processing technology, which specifically includes the following steps: S1, hair fish oil pretreatment: adding an adsorbent to the hair fish oil, using a thermal magnetic stirrer to stir and adsorb the hair fish oil, and stirring for 30 to 40 minutes under heat preservation After that, the fish oil is lowered to room temperature, and the adsorbent is removed by filtration. water and stir, in the state of ethanol reflux, the acid catalyst can catalyze the fish oil to carry out the pre-esterification reaction and then reduce the acid value of the fish oil; S3, esterification reaction: the fish oil obtained through the pre-esterification reaction of step S2 is pumped into reactive distillation Reaction is carried out in the tower, and the esterification reaction of fish oil refining in the reactive distillation tower is carried out synchronously with distillation and concentration; the esterification reaction is the combined catalytic reaction of enzymatic method and alkali method; S4, the fish oil obtained through step S3 esterification reaction is carried out. Freeze decolorization and deoxygenation to obtain ethyl ester fish oil.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to an ethyl ester type fish oil refining process. Background technique [0002] Fish oil is the general term for all oils in fish, including body oil, liver oil and brain oil, etc. The main fish oil is a kind of oil extracted from fatty fish, which contains a large amount of unsaturated fatty acids, has anti-inflammatory and blood lipid regulation, etc. health benefits. Crude fish oil is also called hairy fish oil, because it contains a certain amount of impurities such as water, impurities, colloid, fish body protein and free fatty acids, its acid value is high, its color is deep, and it is accompanied by a strong fishy smell , so it needs to be refined and reach a certain quality index before it can be used. The commonly used fish oil refining process is: crude fish oil-filtration-degumming-washing-drying-decolorization-winterization-deodorization-modulation. ...

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Problems solved by technology

[0004] The Chinese patent with the publication number of 101796984A discloses a method for purifying deep-sea fish oil with supercritical pressure holding, wherein supercritical carbon dioxide is used as an extraction agent and placed in an extraction tank for pressure holding extraction to obtain refined ethyl ester fish oil, supercritical The disadvantage of the extraction method is that the reaction needs to be carried out under high temperature and high pressure, the equipment investment is expensive, the reaction conditions are relatively harsh, fine control is required, and the production cost is high; the Chinese patent with the publication number of CN10567081A discloses a low-temperature continuous phase change to extract the blue round trevally The method of fish oil and the fish oil of blue round trevally, the extraction agent is compressed into a liquid and then flows through the extraction device to extract the blue round trevally powder to obtain fish oil, and then the liquid extractant is phase-changed into a gas, then compressed immediately, and then flows through The extraction device extracts the material again. This method is used to produce fish oil. The process is stable and accurate. The quality of the fish oil obtained is high and the extraction rate is high. However, the reaction conditions are relatively harsh, the production cycle is long, and the production cost and equipment investment are high.

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