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A method for extracting oryzanol from rice bran oil refined soapstock

A technology of rice bran oil and oryzanol, which is applied in the field of extracting oryzanol and using rice bran oil refined soapstock as raw material to extract oryzanol, can solve the problems of excessive solvent residue, reduce the content of oryzanol, use illegal solvents, etc., and achieve easy operation and realization, and production process Simple, low-cost-to-produce effect

Active Publication Date: 2020-08-21
HUNAN HUACHENG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • A method for extracting oryzanol from rice bran oil refined soapstock

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Experimental program
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Effect test

Embodiment 1

[0063] (1) Alcohol extraction: Put 400kg of soapstock raw material refined from rice bran oil into 3m 3 In the extraction tank, turn on the steam, control the temperature at 45°C and heat to soften. After softening, add 2000L of edible ethanol with a volume concentration of 90% and stir to mix evenly. Then use 5% sodium hydroxide aqueous solution to adjust the pH of the solution system to 10 , heated and stirred at 55°C for 20 minutes, and filtered while hot by settling and centrifuging, discarding the centrifuged precipitate to obtain the extract;

[0064] (2) Solid-liquid separation: adjust the pH of the extract to 7.2 with a hydrochloric acid aqueous solution with a mass concentration of 15%, and let it settle for 6 hours. After the precipitation is complete, settle and centrifuge to filter, and collect the precipitate and the filtrate separately. The filtrate is used to prepare the by-product fatty acid. The precipitation is used to prepare oryzanol, and 256kg of centrifug...

Embodiment 2

[0072] (1) Alcohol extraction: Put 250kg of soapstock raw material refined from rice bran oil into 3m 3 In the extraction tank, turn on the steam, control the temperature at 50°C and heat to soften. After softening, add 1500L of edible ethanol with a volume concentration of 85% and stir to mix evenly. Then adjust the pH of the solution system to 9 with an aqueous sodium hydroxide solution with a mass concentration of 5%. , heating and stirring at 50°C for 30 minutes, and then centrifuging and filtering while hot, and discarding the centrifuged precipitate to obtain the extract;

[0073] (2) Solid-liquid separation: adjust the pH of the extract to 7.4 with a sulfuric acid aqueous solution with a mass concentration of 15%, and let it settle for 4 hours. After the precipitation is complete, settle and centrifuge to filter, and collect the precipitate and filtrate separately. The filtrate is used to prepare by-product fatty acids. Precipitation is used to prepare oryzanol, and cen...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07J53/00
CPCC07J53/004
Inventor 黄华学刘庚贵刘永胜
Owner HUNAN HUACHENG BIOTECH
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