A method for extracting oryzanol from rice bran oil refined soapstock

Abstract

A method for extracting oryzanol from rice bran oil refined soapstock as a raw material comprises the following steps: (1) alcohol extraction; (2) solid-liquid separation; (3) deacidification, degreasing, decolorization and washing; (4) refining; (5) crystallization; (6) filtering and washing; and (7) drying. The oryzanol finished product prepared by the method is white powder and is pure naturaloryzanol from rice bran, the purity of the obtained oryzanol can be as high as 99%, the impurity content is low, and the final yield of the oryzanol is more than 70%. According to the invention, solvents with high toxicity such as methanol and the like are not used, solvent residues in the process are removed, and edible ethanol is used in the final process link of product molding, so that the product oryzanol meets the export requirement; the production process is simple and easy to operate and realize. As the rice bran oil refined soapstock is a by-product of the rice bran oil produced in the oil and fat industry, and is used as the raw material, the production cost is low, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of plant extraction and separation, and relates to a method for extracting oryzanol, in particular to a method for extracting oryzanol by using rice bran oil refined soapstock as a raw material. Background technique [0002] Oryzanol exists in rice bran oil and is a mixture of ferulic acid esters mainly composed of triterpene (en) alcohols. It mainly acts on the autonomic nervous system and endocrine center of the diencephalon, can adjust autonomic nervous function, reduce endocrine balance disorders, and improve symptoms of mental and nervous disorders. It also has various physiological functions such as lowering blood lipids, reducing liver lipids, preventing lipid oxidation, and anti-oxidation. In addition, it also has the effect of resisting arrhythmia, which can reduce the excitability of myocardial muscle by regulating the function of autonomic nerves. The lipid-lowering effect of oryzanol can also i...

AI Technical Summary

Problems solved by technology

[0011] At present, the manufacturers of rice bran oil oryzanol are mainly oil factories that refine rice bran oil. There are three main problems with oryzanol in the market: 1. Solvent residues exceeding the standard and using illegal solvents: mainly methanol, hexane and other organic solvents residues, resulting in oryzanol products It cannot be exported to Europe, America and Japan. The green export standard stipulates that no toxic solvents such as methanol should be used in the production process of export products; The analysis shows that some new degradation substances are produced during the production process of these products. Although they are also white, the content of oryzanol is reduced, which is related to the production process; 3. The color of some oryzanol products does not meet the standard: the color of these products is similar to White or off-white, yellowish white, but the content also reached 98%

This method uses toxic methanol. The main process is alkali alcohol dissolution and acid analysis. The content of oryzanol after simple purification needs to be further confirmed.

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