Method for extracting lecithin from egg yolk

A technology of lecithin and egg yolk, applied in the direction of edible phospholipid composition, protein food ingredients, food science, etc., can solve the problems of high equipment requirements, large investment, large amount of solvent usage, etc., to improve the recovery rate, reduce the residual amount, The effect of preserving biological activity

Inactive Publication Date: 2012-09-26
SHIJIAZHUANG HUAMU ANIMAL HUSBANDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Among the above production methods, the solvent extraction method generally uses a single solvent ethanol for extraction. The disadvantage of this process is that the amount of solvent used is large, and the subsequent solvent recovery cost increases
Chromatographic extraction and supercritical CO 2 The production process of the extraction method is relatively complicated, with high requirements for equipment and large investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Get ethanol and ether (both analytically pure, the same below), mix according to the ratio of volume ratio ethanol: ether=3:1, be mixed with binary extract; Get 50g of fresh egg yolk liquid, add 100ml acetone (analytical pure, the same below). ), stirred for 1 hour and allowed to stand for 20 minutes, then filtered until the filter residue was dry and not sticky; take the above filter residue, add binary extract, the amount of binary extract was to add 12ml extract per gram of filter residue, and stir for 30 minutes , then stand still for 20 minutes, centrifuged, take the supernatant, which is the crude lecithin extract; take the above lecithin crude extract, and use a hollow fiber ultrafiltration membrane device with a membrane molecular weight cut-off of 800Da for ultrafiltration, operating pressure to 0.10Mpa, remove the organic solvent, and then vacuum-dry at room temperature to obtain a light yellow translucent viscous substance, which is the finished product of lec...

Embodiment 2

[0033] Get ethanol and ether, mix according to volume ratio ethanol: ether=1: 1 ratio, be mixed with binary extract; Take 50g fresh egg yolk liquid, add 150ml acetone, stir for 30 minutes and let stand for 30 minutes, then filter until the filter residue is Dry and non-sticky; take the above filter residue, add binary extract, the amount of binary extract is to add 8ml extract per gram of filter residue, stir for 1 hour, then let stand for 10 minutes, centrifuge, take the supernatant, that is It is lecithin crude extract; take above-mentioned lecithin crude extract, adopt the hollow fiber ultrafiltration membrane device that membrane molecular weight cut-off is 500Da to carry out ultrafiltration, operating pressure is 0.50Mpa, remove organic solvent, repeat filtration twice, then in 45 Vacuum drying at ℃ to obtain a light yellow translucent viscous substance, which is the finished product of lecithin.

Embodiment 3

[0035] Get ethanol and ether, mix according to the ratio of volume ratio ethanol: ether=2:1, be mixed with binary extract; Take 50g of fresh egg yolk liquid, add 120ml acetone, after stirring for 2 hours, let it stand for 10 minutes, then filter until the filter residue is Dry and non-sticky; take the above filter residue, add binary extract, the amount of binary extract is to add 9ml extract per gram of filter residue, stir for 45 minutes, then let stand for 15 minutes, centrifuge, take the supernatant, that is It is the lecithin crude extract; take the lecithin crude extract above, and use a hollow fiber ultrafiltration membrane device with a membrane molecular weight cut-off of 600Da for ultrafiltration, the operating pressure is 0.30Mpa, remove the organic solvent, repeat the filtration three times, and then filter at room temperature Vacuum-dried to obtain a light yellow translucent viscous substance, which is the finished product of lecithin.

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Abstract

The invention relates to a method for extracting lecithin from egg yolk. The method for extracting the lecithin from the egg yolk includes steps: (1) preparing binary extract liquid; (2)removing impurities in egg yolk liquid; (3) digesting the egg yolk liquid; and (4) filtering and drying crude extract liquid of lecithin. Since ethanol extract liquid in the prior art is replaced by the binary extract liquid of ethanol-ethyl ether, lecithin yield coefficient can be further facilitated; since a hollow fiber ultrafiltration membrane device with membrane molecular weight cutoff of 500-800 Da is employed for performing ultrafiltration for the crude extract liquid oflecithin, organic solvent residue in lecithin is further lowered and production purity is improved. Furthermore, the method for extracting the lecithin from the egg yolk is simple in technique, convenient to operate, applicable to large scale industrialized production, and the like.

Description

technical field [0001] The invention relates to the technical field of deep processing of food, medicine and agricultural products, in particular to a production method for extracting lecithin from egg yolk. Background technique [0002] Lecithin, namely phosphatidylcholine (phosphatidylcholine; PC), is normally light yellow, transparent or translucent viscous, with an isoelectric point pH value of 6.7. Lecithin is an important biologically active substance and an important source of choline and essential fatty acids necessary for the human body. Prevent fatty liver, moisturize the skin and other physiological functions, and also have good emulsification and antioxidant properties. Therefore, lecithin is widely used in food, medicine, cosmetics and other industries. [0003] From the perspective of distribution, lecithin, as the main component of phospholipids, widely exists in the cell tissues of organisms, and egg yolk and plant seeds are the main raw materials rich in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/10
Inventor 闫路娜杨战勇
Owner SHIJIAZHUANG HUAMU ANIMAL HUSBANDRY
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