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Preparation method of moderately processed DHA (Docosahexaenoic acid) microalgae grease

A technology of microalgae oil and fat, which is applied in the fields of fat oil/fat refining, edible oil/fat, fat production, etc., which can solve the problems of waste of resources and energy, unfavorable human health, loss of nutrients, etc.

Active Publication Date: 2013-10-16
青岛海智源生命科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to produce qualified DHA microalgae oil and ensure its shelf life, it is necessary to carry out degumming, deacidification, deodorization and other treatments on the crude oil of DHA microalgae oil to remove colloid, free acid, heavy metal ions, etc. in the oil, but in Over-processing exists in the current field of oil finishing, which not only causes waste of resources and energy, but also causes the loss of beneficial micronutrients naturally present in oil, and also produces accompanying substances that are not conducive to human health. trans fatty acids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] DHA microalgae oil and crude oil are heated to 75°C through a heat exchanger, add 0.3% citric acid with a concentration of 25%, react in an acidification tank for 25 minutes, add 2.0% lye for flocculation, add 1.5% hot soft water , react in a hydration tank for 45 minutes, raise the temperature to 85°C and centrifuge to separate the grease and degummed grease, and dry the degummed grease to remove water and residual solvent.

[0031] Lower the temperature of the degummed grease to 39°C, then add 6.5% lye to react for 50-65 minutes for alkali refining and deacidification; raise the temperature to 85°C for centrifugation, and add 7.0% of the weight of the grease to wash with soft water at 90°C , centrifuged to neutralize the oil;

[0032] Dry the DHA microalgae oil after alkali refining and neutralization at 100°C, and then mix it with a decolorizing agent (the decolorizing agent is a mixture of activated carbon and activated clay, and the mass ratio of activated carbon i...

Embodiment 2

[0036] The crude oil of DHA microalgae oil is heated up to 75°C through a heat exchanger, and the concentration of 0.3% by weight is added to 30% citric acid, reacted in the acidification tank for 25 minutes, 3.0% lye is added for flocculation, and hot demineralized water with a weight of 2.0% is added to the oil. React in the hydration tank for 45 minutes, raise the temperature to 85°C and centrifuge to separate the oil bottoms and degummed oil, and dry the degummed oil to remove water and residual solvent.

[0037] Lower the temperature of the degummed oil to 40°C, then add 5.8% lye to react for 50-65 minutes to carry out alkali refining and deacidification; raise the temperature to 85°C for centrifugation, and add 90°C soft water to wash with 6.5% of the oil weight. centrifuged to obtain neutralized oil;

[0038] Dry the DHA microalgae oil after alkali refining and neutralization at 100°C, and then mix it with a decolorizing agent (the decolorizing agent is a mixture of act...

Embodiment 3

[0042] The crude oil of DHA microalgae oil is heated up to 73°C through a heat exchanger, and citric acid with a concentration of 0.4% by weight is added to 20% citric acid, reacted in an acidification tank for 25 minutes, added 2.5% lye for flocculation, added hot soft water with a weight of 1.0%, and then React in the hydration tank for 45 minutes, raise the temperature to 85°C and centrifuge to separate the oil bottoms and degummed oil, and dry the degummed oil to remove water and residual solvent.

[0043] Lower the temperature of the degummed oil to 40°C, then add lye with a concentration of 7.0% to react for 55 minutes to carry out alkali refining and deacidification; raise the temperature to 85°C for centrifugation, and add 90°C soft water to wash with 8.0% of the oil weight, and centrifuge , to neutralize the oil;

[0044] The DHA microalgae oil after alkali refining and neutralization is dried at 100°C, and then mixed with a decolorizing agent (the decolorizing agent ...

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Abstract

The invention provides a preparation method of moderately processed DHA (Docosahexaenoic acid) microalgae grease. The method comprises the following steps of: first, degumming to remove colloid and impurities in microalgae grease; after degumming, refining alkali and neutralizing at low temperature to remove free acids; then, decoloring in a low temperature vacuum condition to remove residual soap, phosphorus, pigments and the like; and finally, deodorizing through combination of a packed tower and a plate tower, and thermosensitively decoloring to remove fatty acid and small molecular stink substances, wherein the generation amount of trans-fatty acids can be reduced, the loss of vitamin D is reduced, the energy is saved and the consumption is reduced, and the quality of grease products is improved. Due to the adoption of the method, the DHA microalgae grease with low content of trans-fatty acids (less than 1.0%) and low loss ratio of vitamin D can be prepared.

Description

technical field [0001] The invention relates to the technical field of oil refining, in particular to a method for preparing moderately processed DHA microalgae oil. technical background [0002] With the development of food science and technology, various functional oils and fats continue to enter people's lives and play an important role in improving people's nutrition and health. As a new resource food, DHA microalgae oil is also a functional oil rich in DHA, which can enhance memory and thinking ability, improve intelligence and promote brain development. [0003] In order to produce qualified DHA microalgae oil and ensure its shelf life, it is necessary to carry out degumming, deacidification, deodorization and other treatments on the crude oil of DHA microalgae oil to remove colloid, free acid, heavy metal ions, etc. in the oil, but in Over-processing exists in the current field of oil finishing, which not only causes waste of resources and energy, but also causes the...

Claims

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Application Information

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IPC IPC(8): C11B3/00C11B3/06A23D9/04
Inventor 白长军宁超美白红超戚桂斌初跃峰李玉玲
Owner 青岛海智源生命科技有限公司
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