Ethyl ester type fish oil refining processing technology

Abstract

The invention relates to an ethyl ester type fish oil refining processing technology, which specifically comprises: S1, pre-treating crude fish oil, wherein an adsorbent is added to crude fish oil, the crude fish oil is stirred and adsorbed by a thermomagnetic stirrer, thermal insulation stirring is performed for 30-40 min, the fish oil is cooled to a room temperature, the cooled fish oil is filtered to remove the adsorbent, and the obtained fish oil is used for spare; S2, carrying out a pre-esterification reaction, wherein the prepared fish oil is pumped into a reaction kettle, a uniformly-mixed mixture of an acid catalyst and ethanol is added to the reaction kettle, condensation water is introduced while stirring is performed, and the acid catalyst can catalyze the pre-esterification reaction of the fish oil under an ethanol reflux state to reduce the acid value of the fish oil; S3, carrying out an esterification reaction, wherein the fish oil obtained by the pre-esterification reaction in the step S2 is pumped into a reaction distillation tower, and an esterification reaction for fish oil refining and distillation concentration are synchronously performed in the reaction distillation tower, and the esterification reaction is an enzyme and alkali combined catalytic reaction; and S4, carrying out freeze decolorization and deoxidation on the fish oil prepared by the esterification reaction in the step S3 to obtain the ethyl ester type 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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