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Preparation method of rice bran oil rich in diacylglycerol

A technology of rice bran oil and oleic acid monoglyceride, which is applied in the field of lipid deep processing and can solve the problems of limited and unseen rice bran oil and the like

Active Publication Date: 2012-06-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on DAG synthesis at home and abroad, but there is no report involving rice bran oil; on the other hand, foreign research on DAG as edible oil is also very limited, and there is no special research on DAG-rich rice bran oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 20g of high-acid value rice bran oil with 5g of monoglyceride oleate and add it to a closed rotary container with a rotation speed of 80r / min, a vacuum of 50mmHg (absolute pressure), a reaction temperature of 60°C, and a reaction time of 6h. Lipozyme RM IM lipase The amount added is 4%. After the reaction, the sample was taken out, immediately cooled to 30° C. with cooling water, and filtered to remove lipase to obtain DAG-rich rice bran oil.

[0025] The DAG content in the obtained final rice bran oil was 27.42%, and the residual FFA content was 0.73%.

Embodiment 2

[0027] Mix 20g of high-acid value rice bran oil with 5g of monoglyceride oleate, add to a closed rotary container, rotate at 80r / min, vacuum at 50mmHg (absolute pressure), reaction temperature at 60°C, reaction time for 8h, Lipozyme RM IM lipase The amount added is 6%. After the reaction, the sample was taken out, immediately cooled to 30° C. with cooling water, and filtered to remove lipase to obtain DAG-rich rice bran oil.

[0028] The DAG content in the obtained final rice bran oil was 20.51%, and the residual FFA content was 0.29%.

Embodiment 3

[0030] Mix 20g of high acid value rice bran oil with 5g of oleic acid monoglyceride and add it to a closed rotary container with a rotation speed of 80r / min, a vacuum of 50mmHg (absolute pressure), a reaction temperature of 80°C, and a reaction time of 8h. Lipozyme RM IM lipase The amount added is 4%. After the reaction, the sample was taken out, immediately cooled to 30° C. with cooling water, and filtered to remove lipase to obtain DAG-rich rice bran oil.

[0031] The DAG content in the obtained final rice bran oil was 22.06%, and the residual FFA content was 0.16%.

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PUM

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Abstract

The invention relates to a preparation method of rice bran oil rich in diacylglycerol, belonging to the fields of the deep processing and the modification of grease. In the invention, oleic acid glycerol ester and rice bran oil with a high acid value are used as raw materials, influence factors, such as reaction temperature, reaction time, lipase addition, and the like are optimized under vacuum and rotating conditions by adopting a reaction for catalyzing and preparing lipase lipozyme RM IM and the optimal process conditions and parameters for preparing the rice bran oil rich in the diacylglycerol are confirmed. The invention takes favorable guiding action on the development of a novel process for the deep processing of the rice bran oil and lays the foundation for establishing a processing process of healthy and nutritious rice bran oil.

Description

Technical field: [0001] The invention relates to a method for preparing rice bran oil rich in diglyceride, which belongs to the field of lipid deep processing. Background technique: [0002] Diacylglycerol (DAG) is a diester product formed by esterification or transesterification of fatty acids and two hydroxyl groups of glycerol. There are mainly two isomers of 1,3-DAG and 1,2-DAG. Natural oils contain only a small amount of DAG, usually less than 5%. Compared with traditional triglyceride (TAG), DAG has completely different metabolic characteristics, so it has more physiological functions. Studies have shown that the 2-monoglyceride and fatty acids obtained by enzymatic hydrolysis of TAG will be re-esterified into new TAG in the small intestinal epithelial cells, and then the new TAG will enter the vein through blood vessels in the form of chylomicrons. It causes TAG to accumulate in the body, thereby causing symptoms such as obesity and elevated blood lipid levels after...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/64
Inventor 黄健花李磊王兴国
Owner JIANGNAN UNIV
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