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Method for preparing non-solvent high-purity docosahexaenoic acid (DHA) algae oil

A high-purity, non-solvent technology, applied in the direction of fat oil/fat refining, fat production, etc., can solve the problems of limited separation and purification, high cost, low efficiency, etc., and achieve the effect of extended shelf life and low production cost

Active Publication Date: 2014-06-18
XIAMEN HUISON BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have the disadvantages of low efficiency, high investment cost, and large expense in industrialized production, and many solvents have certain toxicity.
Therefore, the separation and purification of industrialized DHA is limited, and then the application of DHA in some industries requiring high purity is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After the raw oil with DHA content of 30wt% has been pre-treated by deacidification, degumming and drying, put the dry oil into the crystallization tank and heat it to 100°C, keep the temperature for 1h, then cool it to 55°C within 0.5h, and then cool it to 0.5°C The algae oil was cooled to 35°C at a cooling rate of 1 / h and a stirring speed of 50 rpm. After growing the crystals for 4 hours, plate and frame pressure filtration was carried out. The obtained filtered liquid oil was normal temperature oil, and the solid oil in the filter plate was collected temporarily. Preserve (as the crystal nucleus of the crystal growth operation); heat the oil at room temperature to 80°C, keep the temperature for 1h, then cool to 45°C within 0.5h, and then cool the oil at a cooling rate of 0.4°C / h at a stirring speed of 40rpm The algae oil is cooled to 10°C, and after 7 hours of crystal growth, the plate and frame filter is carried out, and the filtered liquid oil obtained is low-temper...

Embodiment 2

[0019] After the raw oil with DHA content of 50wt% has been pre-treated by deacidification, degumming, and drying, put 400Kg of dry oil into the crystallization tank and heat it to 90°C, keep the temperature for 1h, then cool it to 50°C within 0.5h, and then add 0.2 Cool the algae oil to 30°C at a cooling rate of ℃ / h and a stirring speed of 40rpm. After growing the crystal for 6 hours, perform plate-and-frame pressure filtration. The obtained filtered liquid oil is normal temperature oil, and the solid oil in the filter plate is collected. Temporary storage (as the crystal nucleus of crystal growth operation); heat the oil at room temperature to 90°C, keep the temperature for 1h, then cool to 45°C within 0.5h, and then cool at a cooling rate of 0.2°C / h at a stirring speed of 20rpm The algae oil is cooled to 5°C, and after 10 hours of crystal growth, plate-and-frame filter press is performed, and the obtained filtered liquid oil is low-temperature oil; 5wt% crystal nuclei of oil...

Embodiment 3

[0021] After the raw oil with a DHA content of 65wt% has been pre-treated by deacidification, degumming, and drying, put 400Kg of dry oil into a crystallization tank and heat it to 100°C. Cool the algae oil to 20°C at a cooling rate of ℃ / h and a stirring speed of 30rpm. After 8 hours of crystal growth, perform plate-and-frame pressure filtration. The obtained filtered liquid oil is normal temperature oil, and the solid oil in the filter plate is collected. Temporary storage (as a crystal nucleus for crystal growth); heat the oil at room temperature to 100°C, keep the temperature constant for 0.5h, then cool to 45°C within 0.5h, and then cool at a cooling rate of 0.1°C / h at a stirring speed of 20rpm Cool the algae oil to 0°C, and after growing the crystal for 12 hours, carry out plate and frame filter press filtration, and the obtained filtered liquid oil is low-temperature oil; add 5wt% crystal nuclei of oil weight to the low-temperature oil and heat it to 90°C at a constant te...

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PUM

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Abstract

The invention discloses a method for preparing non-solvent high-purity docosahexaenoic acid (DHA) algae oil. The method comprises the following steps: firstly, carrying out primary treatment of deacidifying, degumming and drying on a raw material containing 30-65wt% of DHA; heating and fusing the dried DHA algae oil into a homogenous phase, and then cooling, and carrying out filter pressing and filtering by a sheet frame after growing the grain for 2-8 hours, wherein the obtained filtered liquid oil is normal-temperature oil; collecting solid oil, heating and fusing the normal-temperature oil into the homogenous phase, and then cooling; carrying out filter pressing and filtering by the sheet frame after growing the grain for 2-12 hours, wherein the obtained filtered liquid oil is low-temperature oil; finally adding the obtained solid oil which is 1-10wt% of the oil and filtered in the step 2 to the low-temperature oil to heat and fuse into the homogenous phase, and then cooling; carrying out filter pressing and filtering by the sheet frame after growing the grain for 6-24 hours, wherein the obtained filtered liquid oil is winterized oil, and the DHA content is purified into 70-90g / 100g from 30-65g / 100g of raw oil.

Description

Technical field [0001] The present invention involves a technique of a non -solvent purified unsaturated fatty acid, and especially involves a preparation method of purifying the production of zero solvents and high purity DHA algae oil. Background technique [0002] Shun type 4,7,10,16,16,16, 19--22 carbonic acid (DHA), also known as "brain gold", belongs to Omega-3 (ω-3 or N-3) seriesThe diverse unsaturated fatty acids, the human body itself is difficult to synthesize, and must be taken from the outside world.At present, DHA's traditional fish oil sources are affected by the variety, season and geographical location of fish. The product is unstable and the content of cholesterol and other unsaturated fatty acids, limited production and other factors such as limited production and difficulty of separation and purification cannot meet the needs of the market.Therefore, the new source of DHA, which is safe and reliable, has become the hotspot of the current research.The production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00
Inventor 陈礼毅钟惠昌
Owner XIAMEN HUISON BIOTECH