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A kind of oil rich in low saturated fatty acid diglyceride and its preparation method

A technology of fatty acid diglycerides and diglycerides, applied in the direction of fat production, fat oil/fat separation, fermentation, etc., can solve problems such as inability to maintain uniformity, affect sensory quality, precipitation, etc., to reduce fat accumulation and promote crystal nucleation The formation, the effect of mild reaction conditions

Active Publication Date: 2020-12-08
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the saturated acid content in the edible oil is high, it is prone to turbidity and precipitation when the temperature is low in winter, and it cannot maintain good uniformity, which will affect its sensory quality

Method used

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  • A kind of oil rich in low saturated fatty acid diglyceride and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Put 500g of fatty acid mixture (14% palmitic acid, 6% stearic acid, 21% oleic acid, 52% linoleic acid, 5% linolenic acid) into 60°C for half an hour to eliminate historical crystallization, and use 5°C / h Reduce to the required crystallization temperature. Add 0.2% of palmitic acid monoglyceride and crystallize at 10°C for 3 hours to form stable crystals for subsequent separation. After crystal growth, the solid fatty acids are removed by suction filtration. Enzymatic esterification method is used to prepare diglycerides by reacting low-saturation fatty acids with glycerol. The reaction conditions are: the molar ratio of glycerol to fatty acids is 4:1, and Lipase PCL (from "CN108642026A, a partial glyceride fat The addition amount of the enzyme disclosed in "Enzyme mutant and its application" is 5% of the total mass, and the reaction temperature is 35°C. After the reaction time under vacuum was 24 hours, the mixture was centrifuged, the upper oil phase was recovered, and the fa...

Embodiment 2

[0034]Put 500g of fatty acid mixture (14% palmitic acid, 6% stearic acid, 21% oleic acid, 52% linoleic acid, 5% linolenic acid) into 60°C for half an hour to eliminate historical crystallization, and use 5°C / h Reduce to the required crystallization temperature. 0.2% of palmitic acid monoglyceride was added and crystallized at 10°C for 6 hours to form stable crystals for subsequent separation. After crystal growth, the solid fatty acids are removed by suction filtration. The enzymatic esterification method is used to react low-saturation fatty acids with glycerol to prepare diglycerides. The reaction conditions are: the molar ratio of glycerol to fatty acids is 4:1, and the addition amount of lipase Lipase PCL is 5% of the total mass. The temperature is 35°C. After the reaction time under vacuum is 24h, the mixture is centrifuged, the upper oil phase is recovered and the fatty acids and monoglycerides are separated and removed by molecular distillation to obtain oil 2 with diglycerid...

Embodiment 3

[0036]Put 500g of fatty acid mixture (14% palmitic acid, 6% stearic acid, 21% oleic acid, 52% linoleic acid, 5% linolenic acid) into 60°C for half an hour to eliminate historical crystallization, and use 5°C / h Reduce to the required crystallization temperature. 0.2% of palmitic acid monoglyceride was added and crystallized at 10°C for 12 hours to form stable crystals for subsequent separation. After crystal growth, the solid fatty acids are removed by suction filtration. The enzymatic esterification method is used to react low-saturation fatty acids with glycerol to prepare diglycerides. The reaction conditions are: the molar ratio of glycerol to fatty acids is 4:1, and the addition amount of lipase Lipase PCL is 5% of the total mass. The temperature is 35°C. After the reaction time under vacuum was 24 hours, the mixture was centrifuged, the upper oil phase was recovered and the fatty acids and monoglycerides were separated and removed by molecular distillation to obtain oil 3 with ...

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Abstract

The invention discloses a preparation method of grease rich in low-saturated fatty acid diglyceride, which comprises the following steps: 1) carrying out dry fractionation on mixed fatty acid to obtain low-saturated fatty acid; and 2) carrying out esterification reaction on the low-saturated fatty acid and glycerol to obtain the grease rich in the low-saturated fatty acid diglyceride. The grease can simultaneously show the beneficial functions of diglyceride and low saturated fatty acid, so that the product has more obvious effects of losing weight and reducing blood fat, has good storage stability, can be used as cooking oil, seasoning oil and the like, and widens the application range of diglyceride.

Description

Technical field[0001]The invention relates to a fat rich in diglycerides of low-saturated fatty acids and a preparation method.Background technique[0002]With the improvement of living standards, people pay more and more attention to healthy diet. As one of the essential nutrients in daily life, oil occupies an important position in the food industry. Since the middle of the twentieth century, the beneficial functions of diglycerides have attracted people's attention. A large number of animal experiments and clinical medicine have proved that long-term consumption of diglycerides can inhibit the accumulation of fat in the body and improve the level of blood lipids. Compared with triglycerides, diglycerides have different metabolic pathways in the body. When the body takes in DAG, the rate of postprandial blood lipid levels rises significantly slower, thereby reducing blood lipids and losing weight.[0003]Diglyceride (DAG) is a natural oil, composed of one molecule of glycerol and two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/64C11B7/00
CPCC11B7/0075C12P7/6454C12P7/6472
Inventor 王永华王方华徐婉莉杨博王卫飞蓝东明罗日明
Owner SOUTH CHINA UNIV OF TECH
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