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Method for reducing content of glycidyl ester in edible oil by using adsorbent

A technology of glycidyl ester and edible oil, which is applied in the direction of edible oil/fat, application, food science, etc., can solve the problems of difficulty in controlling the quality consistency of raw materials, low removal rate of glycidyl ester, and complicated implementation, etc., to achieve Convenient for industrial production, no solvent residue, easy to operate

Inactive Publication Date: 2015-11-18
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] There are mainly the following reports about the method for reducing the content of GEs in oils: Chinese patent application number 103060088A "Method for controlling glycidyl esters in oils" discloses a method for controlling the content of glycidyl esters, which is achieved by adding an appropriate amount of citric acid crystals Or solution into the decolorized oil and carry out the final deodorization, this reaction involves degumming, decolorization and deodorization and other steps, the process is complicated, the cost is high, and the removal rate of glycidyl ester is not high; the patent No. 103442577A "does not contain Glycidyl Esters Refined Vegetable Oils" discloses a method for producing vegetable oils substantially free of glycidyl ester contaminants by using in an oil refining process a vegetable oil having Obtained from vegetable oil or vegetable oil fractions with a maximum content of 3% diacylglycerides, which requires the selection of fresh palm fruit to produce palm oil, and the cycle from harvesting plant raw materials to producing refined oil is less than one week, this method The requirements for raw materials are high, it is difficult to control the consistency of raw material quality, and the implementation is more complicated; the article "Strategies for therereduction of 3-MCPDesters and related compounds in vegetable oils" (Eur.J.LipidSci.Technol, 113, 2011) Bertrand Matthaus et al. used in the process of deodorization Replacing water with acid solution can reduce 35% of glycidyl esters in oil, and at the same time, cleaning raw material oil with water or 75% ethanol can also reduce the content of glycidyl esters by 20%-25%. These measures can be reduced to a certain extent Glycidyl ester content, but its removal rate is low, and the use of acid solution instead of water is not friendly to the environment, and cleaning raw oil also has a certain impact on the quality of oil

Method used

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  • Method for reducing content of glycidyl ester in edible oil by using adsorbent

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Experimental program
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Effect test

Embodiment 1

[0023] In a 100mL beaker, add 20g of palm oil, and at the same time add 2% of the weight of palm oil special activated carbon for edible oil, then use a constant temperature oil bath to quickly raise the temperature to 100°C, and react for 30min under rapid stirring at a speed of 10rpm. After the reaction was completed, it was filtered at 100°C to obtain a light yellow transparent liquid. The oxidative stability of the oil after adsorption is better than that before adsorption. Other indicators such as acid value and peroxide value are in line with national standards. After adsorption by special activated carbon for edible oil, the content of glycidyl ester in palm oil has increased from 3.7ppm It is reduced to about 0.3ppm, and the removal rate is above 92%. The specific experimental data are shown in Table 1.

[0024] Table 1

[0025]

Embodiment 2

[0027] In a 100mL beaker, add 20g of peanut oil, and at the same time add 5% of the weight of peanut oil special activated carbon for cooking oil, then use a constant temperature oil bath to quickly heat up to 100°C, and react for 60min under rapid stirring at a speed of 15rpm. After the reaction was completed, it was filtered at 100°C to obtain a yellow transparent liquid. The oxidative stability of the oil after adsorption is better than that before adsorption, and other indicators such as acid value and peroxide value are in line with national standards. After adsorption by special activated carbon for edible oil, the content of glycidyl ester in peanut oil is reduced from about 0.8ppm It is reduced to about 0.1ppm, and the removal rate is above 86%. The specific experimental data are shown in Table 1.

Embodiment 3

[0029] In a 100mL beaker, add 20g of corn oil, and at the same time add 10% of the weight of the corn oil as a silicon-magnesium-type adsorbent, then use a constant temperature oil bath to rapidly raise the temperature to 80°C, and react for 90min under rapid stirring at a speed of 20rpm. After the reaction was completed, it was filtered at 80°C to obtain a light yellow transparent liquid. The oxidative stability of the oil after adsorption is better than that before adsorption. Other indicators such as acid value and peroxide value are in line with national standards. About ppm is reduced to about 0.3ppm, and the removal rate is above 80%. The specific experimental data are shown in Table 1.

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Abstract

The invention relates to a method for reducing the content of glycidyl ester in edible oil by using an adsorbent. A proper amount of the adsorbent is added for an adsorption reaction with oil; the adsorption reaction is carried out at 80 to 120 DEG C for 10 to 120 min; full stirring is carried out at a speed of 5 to 20 rpm; and after completion of the reaction, the oil is filtered at 80 to 120 DEG C. Results show that more than 80% of glycidyl ester in the edible oil is removed by using the adsorbent. According to the invention, the content of glycidyl ester in refined edible oil is substantially reduced through physical adsorption; the method has simple process flow and low requirements on equipment and is safe and nontoxic; and oil treated by the adsorbent has high edible quality.

Description

technical field [0001] The invention relates to the field of edible oil processing, in particular to an edible oil processing method for reducing the content of glycidyl ester in edible oil by using an adsorbent. Background technique [0002] Glycidyl esters (GEs) are the esterification products of glycidol and free fatty acids, which are a kind of terminal epoxy esters and also a new type of oil hazards. GEs is a common pollutant in the thermal processing of fats and oils. It is decomposed into glycidol in the body. In the presence of hydrochloric acid, glycidol is easily converted into 3-chloropropanol (3-MCPD). Food and Agriculture Organization of the United Nations / World The health organization (FAO / WHO) pointed out that it is a carcinogen with kidney, reproductive, genetic and neurotoxicity, and recommended that its maximum allowable intake (PMTDI) be 2 μg / kg. [0003] In 2008, the German Federal Institute for Risk Assessment (BFR) confirmed for the first time that the...

Claims

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Application Information

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IPC IPC(8): A23D9/04
Inventor 刘国琴尹诗琴
Owner SOUTH CHINA UNIV OF TECH
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