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Method for degumming rice bran oil with oxalic acid

A degumming method and rice bran oil technology, applied in the direction of oil/fat refining, fat production, etc., can solve the problems of poor oil quality, increase the difficulty of decolorization and physical deacidification, etc., and achieve good degumming effect.

Inactive Publication Date: 2012-05-16
李洪运
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Problems solved by technology

These gums are mixed in the presence of iron, cobalt, copper and other metal ions, through a series of complex reactions such as degradation, compounding, and chelation, to generate melanin, such as amino sugars, which are difficult to remove, making the oil quality worse and increasing The difficulty of decolorization and physical deacidification

Method used

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Embodiment

[0011] A method for oxalic acid degumming of rice bran oil, which is characterized in that: crude oil extracted from rice bran is degummed with oxalic acid, combined with processes such as decolorization, dewaxing, and physical deacidification to obtain rice bran product oil, which specifically includes the following steps:

[0012] (1) Impurity removal: the rice bran crude oil should remove solid impurities before degumming, after removal, the solid impurities in the oil should be less than 0.2%;

[0013] (2) Oxalic acid degumming: adjust the temperature of the crude oil to 40°C, slowly add 20% oxalic acid aqueous solution under rapid stirring (60r / min), the temperature is similar to the oil temperature, and the amount added is 0.5% of the oil weight, After adding oxalic acid, continue to stir rapidly, and heat up to a final temperature of 60°C. After reaching the final temperature, continue to stir for 30rain, and then stand still for 1h;

[0014] (3) One-time water washing:...

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Abstract

The invention which relates to a method for processing rice bran oil and concretely relates to a method for degumming rice bran oil with oxalic acid belongs to the technical field of the chemical industry. According to the method, crude extracted rice bran oil is degummed by oxalic acid and undergoes processes of decoloring, dewaxing and physical depickling to obtain refined rice bran oil. Compared with routine high temperature hydration methods and phosphoric acid hydration methods, the method of the invention is better in the degumming effect which is mainly reflected in the following aspects: the content of phosphor in the degummed oil is low and the color of the degummed oil is light. Oxalic acid which has a good degumming effect also has an auxiliary decoloring effect. The color of the crude rice bran oil degummed through the high temperature hydration is darker than before; and the color of the crude rice bran oil degummed through the phosphoric acid hydration is basically unchanged.

Description

technical field [0001] The invention relates to a processing method of rice bran oil, in particular to an oxalic acid degumming method of rice bran oil, which belongs to the technical field of chemical industry. Background technique [0002] Rice bran oil contains many types of gums and complex components, mainly containing 0.4%-0.8% phospholipids, 0.5% bran lipids, 0.1% lipoproteins, and varying contents of glycolipids, glycosides, and sugars. Proteins, fatty acid sterol esters and other binding lipids, and also contain mucous substances composed of monosaccharides and galactobionic acids. In addition, rice bran crude oil also contains metal ions such as iron, cobalt, and copper that are several times higher than ordinary crude oil. These gums are mixed in the presence of iron, cobalt, copper and other metal ions, through a series of complex reactions such as degradation, compounding, and chelation, to generate melanin, such as amino sugars, which are difficult to remove, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/04
Inventor 李洪运
Owner 李洪运
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