Processing technology of deep sea fish oil in high EPA (Eicosapentaenoic Acid) DHA (Docosahexaenoic Acid) contents
A technology of deep-sea fish oil and processing technology, which is applied in the field of oil processing, can solve the problems of DHA content reduction, small product separation scale, and long reaction time, so as to prevent and reduce the possibility of oxidation, simplify the decolorization and deodorization process, and shorten the heating time. Effect
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[0030] Example one:
[0031] A processing technology of deep-sea fish oil with high EPA and DHA content includes the following steps:
[0032] Step 1. Pump the crude fish oil into the pretreatment tank, turn on the stirrer, and the stirring speed is 200 revolutions per hour; turn on the steam to heat up, and when the temperature reaches 70°C, spray 15% aqueous sodium hydroxide solution by mass to maintain the stirring speed 200-300r / h and temperature 70℃-80℃, stirring time is 0.25-0.5h; after stirring, the temperature drops to 40-60℃, sedimentation is 5-8 hours, and the lower impurity components are separated and removed; the crude fish oil and The mass ratio of the sodium hydroxide aqueous solution with a mass concentration of 15%-25% is 1:35.
[0033] Step 2. The fish oil pretreated in step 1 is mixed with citric acid at a mass ratio of 100:0.01, and the mixture is evenly distributed from the top of the packed tower by a distributor to each part of the packing in the tower; The b...
Example Embodiment
[0038] Embodiment two:
[0039] A processing technology of deep-sea fish oil with high EPA and DHA content includes the following steps:
[0040] Step 1. Pump the crude fish oil into the pretreatment tank, turn on the stirrer, and the stirring speed is 250 rpm; turn on the steam to heat up, and when the temperature reaches 75 ℃, spray 20% mass concentration of sodium hydroxide aqueous solution to maintain the stirring speed The temperature is 250r / h and the temperature is 75°C, and the stirring time is 0.35h; after the stirring, the temperature drops to 50°C, sedimentation is 7 hours, and the lower impurity components are separated and removed; the mass ratio of the crude fish oil to the sodium hydroxide solution is 1:40 .
[0041] Step 2. The fish oil and citric acid pretreated in step 1 are mixed at a mass ratio of 100:0.015, and the mixture is evenly distributed from the top of the packed tower by a distributor to each part of the packing in the tower; The bottom of the packed t...
Example Embodiment
[0046] Embodiment three:
[0047] A processing technology of deep-sea fish oil with high EPA and DHA content includes the following steps:
[0048] Step 1. Pump the crude fish oil into the pretreatment tank, turn on the stirrer, and the stirring speed is 300 rpm; turn on the steam to increase the temperature, and when the temperature reaches 80°C, spray into the 25% mass concentration sodium hydroxide aqueous solution and keep the stirring speed The temperature is 200r / h and the temperature is 70°C, and the stirring time is 0.25h; after the stirring, the temperature drops to 40°C, sedimentation is 5 hours, and the lower impurity components are separated and removed; the mass ratio of the crude fish oil to the sodium hydroxide solution is 1:55 .
[0049] Step 2. The fish oil and citric acid pretreated in step 1 are mixed at a mass ratio of 100:0.02, and the mixture is evenly distributed from the top of the packed tower by a distributor to each part of the packing in the tower; The b...
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