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Method for removing total cholesterol in animal fat

A technology of animal fat and total cholesterol, which is applied in the field of improved animal fat processing technology to remove cholesterol from animal fat, can solve the problems of cumbersome operation steps, complex reactant system, and low operability, and achieve the effect of simple operation

Active Publication Date: 2014-03-12
WILMAR SHANGHAI BIOTECH RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this method: (1) The reactant system is complex and additional reactants need to be added
(2) The operation steps are cumbersome, because the polarity of the product becomes larger after esterification, and it needs to be removed by adding alkaline aqueous solution or anion exchange resin, etc. In addition, the excess polyacylating reagent also needs to be removed by washing, centrifugation or solvent extraction, which is industrially operable low level

Method used

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  • Method for removing total cholesterol in animal fat
  • Method for removing total cholesterol in animal fat
  • Method for removing total cholesterol in animal fat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Chemical method esterification + adsorption

[0125] Heating the animal fat, adding an esterification reaction catalyst, and carrying out the esterification reaction for a period of time at a certain temperature and keeping the vacuum degree below 10mbar. After the reaction of the reaction system is completed, centrifuge to separate the solid from the liquid, and take the liquid phase; then heat the above animal fat to 100-200° C., add an adsorbent, and react under vacuum for 1-120 minutes. After the reaction of the reaction system is finished, the solid and liquid are separated by suction filtration to obtain animal fat with low total cholesterol and low free cholesterol. The experimental conditions of Example 1 are shown in Table 3.

[0126] Table 3: Experimental conditions of Example 1

[0127]

[0128]

[0129]The results of each experiment in Example 1 are compared with the results of Comparative Example 1 in Table 4.

[0130] Table 4: Each experimental re...

Embodiment 2

[0135] Enzymatic esterification + adsorption

[0136] The animal fat is heated, and an enzymatic esterification reaction catalyst is added, and at a certain temperature, the vacuum degree is kept below 10mbar to carry out the esterification reaction for a period of time. After the reaction system is completed, centrifuge to separate the solid from the liquid, and take the liquid phase; then heat the liquid phase obtained in the previous step to 100-200° C., add an adsorbent, and react under vacuum for 1-120 minutes. After the reaction of the reaction system is finished, the solid and liquid are separated by suction filtration to obtain animal fat with low total cholesterol and low free cholesterol. The experimental conditions of embodiment 2 are shown in table 5.

[0137] The experimental condition of table 5 embodiment 2

[0138]

[0139]

[0140] The experimental results in Example 2 are compared with the results of Comparative Example 1 in Table 6.

[0141] Table 6...

Embodiment 3

[0145] In the aforementioned method, in order to avoid the influence on the adsorption, separation was carried out after the esterification reaction. In order to investigate the impact of this step, the inventors treated the corresponding oils and fats according to the methods of Examples 1 and 2, but directly used the esterification product for adsorption operation after the esterification reaction instead of using the solid-liquid separation obtained in advance. The liquid phase product is adsorbed, and the removal rate of free cholesterol and total cholesterol is detected respectively, and is compared with the free cholesterol and the removal rate of the oil processed by the method of Examples 1 and 2 and the oil processed with the existing method A comparison was made.

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Abstract

The invention provides a method for removing total cholesterol in animal fat. The method comprises the following steps: first, esterification is performed, animal fat is subjected to an esterification reaction under action of catalysts; second, adsorption is performed, the products after esterification reaction are contacted with adsorbents; third, the products after adsorption reaction is subjected to solid-liquid separation. In the method, no extra reaction substrates need to be added, no superfluous reactants need to be removed in the subsequent separating and processing steps, and the operation is simple. The polarity of the products after esterification weakens, and the products are easy to be absorbed by the adsorbents. The removing rates of free cholesterol and total cholesterol through the esterification and adsorption two-step method are both higher than that only through an adsorption method.

Description

technical field [0001] The invention relates to an animal fat processing technology, in particular to an improved animal fat processing technology, more specifically, the invention relates to a method for removing cholesterol in animal fat. Background technique [0002] Cholesterol in animal fats exists in two forms: free and bound. The bound cholesterol is cholesterol esters in which the hydroxyl group has been esterified by free fatty acids, such as cholesterol oleate or cholesterol palmitate. Milk fat generally contains 0.25%-0.3% cholesterol, butter generally contains 0.1%-0.2% cholesterol, egg yolk has a higher content, accounting for about 0.5%-2.5% of dry weight. [0003] It is well known that very high serum cholesterol levels, high blood pressure, and abnormal EKG are all important factors that cause heart attacks. In recent years, many studies have found that high levels of plasma cholesterol can cause atherosclerosis and increase the risk of coronary heart diseas...

Claims

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Application Information

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IPC IPC(8): C11B3/10A23D9/02
Inventor 张敏王勇姜元荣郭涛周耀奇
Owner WILMAR SHANGHAI BIOTECH RES & DEV CENT
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