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A method for producing diglycerides with high acid value rice bran oil

A technology of high acid value rice bran oil and diglyceride, applied in the direction of fermentation, can solve the problems of reducing production efficiency and high viscosity of the reaction mixture, and achieve the effects of reducing energy consumption and waste water generation, reducing losses and saving energy consumption

Active Publication Date: 2011-12-07
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively speaking, the non-solvent system enzymatically prepares diglycerides with milder reaction conditions and less environmental pollution, but the lower reaction temperature will make the reaction mixture more viscous, and the hydrophilicity of the enzyme can easily be divided into hydrophobic oil phase, Hydrophilic glycerol phase and solid enzyme phase, which reduces production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for producing diglyceride oil with high acid value rice bran oil, its steps are as follows:

[0019] (1) Hydration and degumming of high-acid rice bran oil to obtain degummed high-acid rice bran oil: Centrifuge the high-acid rice bran oil at a speed of 5000 rpm for 20 minutes to remove impurities; Pump the acid-value rice bran oil into the hydration tank, raise the oil temperature to 60-65°C with a stirring speed of 40 rpm, and then add the same oil temperature and oil 2% heavy brine with a concentration of 0.7%, keep the temperature constant, continue to stir for 30-40 minutes, when the flocculation of the colloidal particles is clearly separated, let it settle to complete the hydration; then pump it into the centrifuge for oil and Separation of gums; transfer degummed high-acid rice bran oil containing water to vacuum equipment with a vacuum degree of 0.08-0.1Mpa and a temperature of 95-105°C for dehydration to obtain degummed high-acid rice bran oil;

[002...

Embodiment 2

[0023] (1) Degumming and degumming of high acid value rice bran oil to obtain degummed high acid value rice bran oil is the same as step (1) in Example 1;

[0024] (2) Preparation of diglyceride mixture by enzymatically degumming high-acid value rice bran oil transesterification: add immobilized lipase Lipozyme RM IM based on 6% of the oil quality, react for 7 hours, and other transesterification conditions are the same as in step (2) in Example 1 );

[0025] (3) The separation of diglyceride is the same as step (3) in Example 1.

Embodiment 3

[0027] (1) Degumming and degumming of high acid value rice bran oil to obtain degummed high acid value rice bran oil is the same as step (1) in Example 1;

[0028] (2) Preparation of diglyceride mixture by enzymatic degumming high acid value rice bran oil transesterification: 100 g of degummed high acid value rice bran oil obtained in step (1) and 2 g of glycerin are transported to a connected vacuum and stirred at 720 r / min by a pump In the reaction tank, after the temperature of the automatic temperature control reaction system was raised to 75°C, an immobilized lipase Novozym 435 based on 2% of the oil mass was added, reacted for 7 hours, and the lipase was recovered by filtration;

[0029] (3) Separation of diglycerides: pump the product obtained from the reactor in step (2) into a centrifuge for centrifugation, and transfer the upper layer of oil into a crystallization tank with stirring at 58-59 ° C, and make the mass ratio of solvent to oil 2.5 : 1 Add 95% ethanol to di...

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PUM

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Abstract

The invention discloses a method for producing diglyceride with rice bran oil of high acid value. The method adopts rice bran oil of high acid value as the substrate material and glycerin as the acyl acceptor, and employs lipase for the glycerolysis of rice bran oil of high acid value through enzymatic reaction and the synthesis of diglyceride through esterification in a non-solvent system. The method comprises the steps of: (1) subjecting crude rice bran oil of high acid value to a hydrated degumming process so as to obtain degummed rice bran oil of high acid value; (2) adding glycerin into the degummed rice bran oil of high acid value, thus obtaining a mixture of diglyceride; (3) separating the mixture of diglyceride, thus obtaining diglyceride. In the invention, the preparation processis shortened, the unit operation process of separating the solvent from the system is nonexistent, and the energy consumption is saved. The method of the invention makes fully use of the free fatty acid in the system to reduce the acid value of the system, and the loss of nutrient components from the rice bran oil of high acid value under an enzymatic mild reaction condition is reduced.

Description

technical field [0001] The invention relates to a method for enzymatically synthesizing diglyceride oil, in particular to a method for producing diglyceride oil by using rice bran oil with high acid value as a raw material. Background technique [0002] Rice bran oil with high acid value is an internationally recognized nutritious oil. It is called "healthy nutritious oil" abroad. It is rich in essential fatty acids, and its fatty acid composition is relatively reasonable, which meets the best ratio recommended by the World Health Organization. Rice bran oil with high acid value is rich in tocotrienols, oryzanol, sterols, squalene, etc. These nutrients are beneficial to the absorption and utilization of the human body. Therefore, as a food-grade high-acid rice bran oil, long-term consumption has the functions of preventing cardiovascular and cerebrovascular diseases, promoting metabolism and anti-aging. my country is rich in rice bran resources, but because rice bran contai...

Claims

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Application Information

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IPC IPC(8): C12P7/64
Inventor 马传国张科红王高林郭瑞华王敏
Owner HENAN UNIVERSITY OF TECHNOLOGY
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