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Decolorizing column and method for performing normal temperature decolorization on DHA grease by employing same

A decolorization and oil removal technology, which is applied in the fields of fat oil/fat refining, chemical instruments and methods, and fat production. Consumption, improve the effect of quality

Active Publication Date: 2010-11-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This deodorization process consumes a lot of energy and takes a long time

Method used

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  • Decolorizing column and method for performing normal temperature decolorization on DHA grease by employing same
  • Decolorizing column and method for performing normal temperature decolorization on DHA grease by employing same

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: the preparation of decolorization column.

[0027] (1) After 120g of silica gel (coarse pores, 100-200 mesh, Qingdao Ocean Chemical Factory) was soaked in 500mL of methanol for 1 hour, the methanol was recovered by suction filtration, the silica gel was washed with deionized water 4 times the volume of methanol, and the water was filtered off. Activated by heating at 100-110°C for more than 12 hours to obtain activated silica gel;

[0028] (2) Stir and mix diatomite 545 and activated carbon at a mass ratio of 1:2 to obtain a mixture of diatomite 545 and activated carbon (100 mesh); stir and mix diatomite 545 and sucrose at a mass ratio of 1:2 to obtain A mixture of diatomaceous earth 545 and sucrose;

[0029] (3) the mixture of diatomite 545 obtained in step (2) and gac and the mixture of diatomite 545 and sucrose are soaked in normal hexane respectively, wash and filter with normal hexane repeatedly until washing liquid can not detect peroxide value ( P...

Embodiment 2

[0032] Embodiment 2: the preparation of decolorizing column.

[0033] (1) After soaking 120g of silica gel (coarse pores, 100-200 mesh, Qingdao Ocean Chemical Plant) in 500mL of methanol for 1 hour, recover the methanol by suction filtration, rinse the silica gel with deionized water 3 times the volume of methanol, filter out the water and place Activated by heating at 100°C for more than 12 hours to obtain activated silica gel;

[0034] (2) Stir and mix diatomite 545 and activated carbon at a mass ratio of 1:1 to obtain a mixture of diatomite 545 and activated carbon (200 mesh); stir and mix diatomite 545 and sucrose at a mass ratio of 1:2 to obtain A mixture of diatomaceous earth 545 and sucrose;

[0035] (3) the mixture of diatomite 545 obtained in step (2) and gac and the mixture of diatomite 545 and sucrose are soaked in normal hexane respectively, wash and filter with normal hexane repeatedly until washing liquid can not detect peroxide value ( POV);

[0036] (4) Soak...

Embodiment 3

[0038] Embodiment 3: the preparation of decolorizing column.

[0039] (1) After soaking 120g of silica gel (coarse pores, 100-200 mesh, Qingdao Ocean Chemical Plant) in 500mL of methanol for 1 hour, recover the methanol by suction filtration, rinse the silica gel with deionized water 3 times the volume of methanol, filter out the water and place Activated by heating at 110°C for more than 12 hours to obtain activated silica gel;

[0040] (2) Stir and mix diatomite 545 and activated carbon at a mass ratio of 1:1 to obtain a mixture of diatomite 545 and activated carbon (50 mesh); stir and mix diatomite 545 and sucrose at a mass ratio of 1:2 to obtain A mixture of diatomaceous earth 545 and sucrose;

[0041] (3) Soak the mixture of diatomite 545 and gac obtained in step (2) and the mixture of diatomite 545 and sucrose in n-hexane respectively, and repeatedly wash and filter with n-hexane until the eluent does not detect the peroxide value (POV);

[0042] (4) Soak 60g of activ...

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Abstract

The invention discloses a decolorizing column, which is filled with an activated silica gel, a mixture of diatomaceous earth 545 and activated carbon, a mixture of the diatomaceous earth 545 and sucrose, and the activated silica gel respectively from the bottom of the column to the top of the column, wherein the mass ratio of the four filling materials is 0.5-2:0.5-1.5:0.5-1.5:0.5-2. The invention also discloses a preparation method of the decolorizing column and a method for performing normal temperature decolorization on DHA grease by employing the decolorizing column. The decolorization process of the method is performed at normal temperature; bleached oil is nearly colorless, and the oxidation value, the acid value and fishy odors of the bleached oil are obviously reduced; the temperature and the time for a subsequent deodorization process are reduced; the transformation of polyunsaturated fatty acid to trans-fatty acid at a high temperature is avoided; the energy consumption is saved; the loss of the DHA grease is less, and the fatty acid composition is not changed obviously; and an oil sample is clear and has great fluidity. Therefore, the method can improve the quality of the DHA grease.

Description

technical field [0001] The invention belongs to the technical field of biological separation, and in particular relates to a decolorization column and a low-temperature decolorization method for DHA oil by using the column. Background technique [0002] Docosahexaenoic Acid (DHA) is an important n-3 long-chain polyunsaturated fatty acid, commonly known as brain gold, which has the functions of enhancing memory, improving intelligence, lowering blood lipids, and regulating the immune system. DHA plays an important physiological role in the growth and development of infants, and can promote the intelligence and vision development of fetuses and infants. Therefore, adding DHA to infant formula has attracted more and more attention. The content of polyunsaturated fatty acids in DHA oil produced by microalgae accounts for more than 70%. Because it is rich in cis double bonds, the cis double bonds of unsaturated fatty acids will be converted into The opposite form, thus increasin...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C11B3/16
Inventor 黄和龚东平胡耀池陈园力张红漫肖爱华
Owner NANJING UNIV OF TECH
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