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Method for extracting and removing cholesterol in lard oil through ultrasonic wave assistance and deep eutectic solvent

A low eutectic solvent, ultrasonic-assisted technology, which is applied in the production of fat/fat, refining of fat/fat, and fat production, can solve the problems of difficulty in industrialization, expensive enzymatic method, serious environmental pollution, etc., and achieve biocompatibility. Good performance, simple operation and obvious removal effect

Active Publication Date: 2019-08-02
SERICULTURE & AGRI FOOD RES INST GUANGDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing physical method has too high requirements on equipment and large investment; the chemical method uses organic solvents to cause serious environmental pollution; and the enzymatic method is expensive and other problems, making it difficult to realize industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The impurity-removing lard was mixed with choline chloride / urea deep eutectic solvent (the molar ratio of choline chloride and urea was 1:2), and cholesterol was removed by ultrasonic-assisted extraction. The mass ratio of lard to deep eutectic solvent is 1:1, the extraction temperature is 40°C, and the ultrasonic power is 100W. After extraction for 20 minutes, centrifuge at 5000rpm / min for 20 minutes to collect the upper layer of oil, which is low cholesterol lard. The elimination rate is 93%. The lower layer after centrifugation is back-extracted with petroleum ether to remove the cholesterol therein, and then evaporated to remove the residual petroleum ether to obtain the regenerated choline chloride / urea deep eutectic solvent, which can be recycled.

Embodiment 2

[0030] The impurity-removed lard was mixed with choline chloride / glycerol deep eutectic solvent (the molar ratio of choline chloride and glycerin was 1:2), and cholesterol was removed by ultrasonic-assisted extraction. The mass ratio of lard to deep eutectic solvent is 0.8:1, the extraction temperature is 60°C, and the ultrasonic power is 60W. After extraction for 30 minutes, centrifuge at 10,000rpm / min for 2 minutes, and collect the upper layer of oil, which is low-cholesterol lard. The elimination rate is 95%. The lower layer after centrifugation is back-extracted with petroleum ether / methanol to remove the cholesterol therein, and then evaporated to remove the residual petroleum ether to obtain a regenerated choline chloride / glycerol deep eutectic solvent, which can be recycled.

Embodiment 3

[0032] The impurity-removing lard was mixed with choline chloride / xylitol deep eutectic solvent (the molar ratio of choline chloride and xylitol was 2:1), and cholesterol was removed by ultrasonic-assisted extraction. The mass ratio of lard to deep eutectic solvent is 0.5:1, the extraction temperature is 90°C, and the ultrasonic power is 100W. After extraction for 20 minutes, centrifuge at 4000rpm / min for 30 minutes to collect the upper layer of oil, which is low-cholesterol lard. The elimination rate is 94%. The lower layer liquid after centrifugation is back-extracted with petroleum ether to remove the cholesterol therein, and then evaporated to remove the residual petroleum ether to obtain the regenerated choline chloride / xylitol deep eutectic solvent, which can be recycled.

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Abstract

The invention belongs to the field of deep processing of foods and discloses a method for extracting and removing cholesterol in lard oil through ultrasonic wave assistance and a deep eutectic solvent. The method comprises the following steps: (1) taking impurity removal lard oil as the raw material and the deep eutectic solvent as an extracting agent, extracting through the ultrasonic wave assistance at a certain temperature; (2) centrifuging and separating after finishing extracting, collecting an oil liquid on the upper layer, namely low cholesterol lard oil; and (3) using a solvent like petroleum ether to extract back to remove the cholesterol in the cholesterol rich deep eutectic solvent rich on the lower layer, and then evaporating to obtain a regenerated deep eutectic solvent. The operation process is simple, the removal rate of the cholesterol is high, the deep eutectic solvent can be recycled, and the method is easy to apply industrially on a large scale.

Description

technical field [0001] The invention belongs to the field of deep processing of food, and in particular relates to a method for removing cholesterol in lard by ultrasonic-assisted deep eutectic solvent extraction. Background technique [0002] my country has huge lard oil resources that can be developed and utilized. Lard is rich in essential fatty acids, is the main carrier of fat-soluble vitamins, and is also an important source of arachidonic acid and α-lipoprotein. However, the biggest defect of lard is its high cholesterol content. Excessive intake will increase the risk of hypertension, hyperlipidemia and cardiovascular disease, which limits its application in food. Unrefined lard has an average cholesterol content of 100-150mg / 100g. After refining, the cholesterol content in lard is still 50-70mg / 100g. Although lard is harmful to human health due to its cholesterol content, its unique fragrance cannot be replaced by vegetable oil. Therefore, the development of cost-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B3/16C11B1/02
CPCC11B1/10C11B3/16C11B1/02
Inventor 王旭苹周鹏飞刘学铭程镜蓉张友胜张业辉阮奇珺汪婧瑜
Owner SERICULTURE & AGRI FOOD RES INST GUANGDONG ACAD OF AGRI SCI