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Novel method for extracting oryzanol from crude rice bran oil

A technology of rice bran crude oil and oryzanol, applied in the directions of steroids, organic chemistry, etc., can solve the problems of low oryzanol yield and high cost, and achieve the effects of high yield, low cost and stable operation

Active Publication Date: 2013-12-11
ZHEJIANG DELEKANG FOOD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the low yield and high cost of extracting oryzanol from rice bran crude oil, the present invention provides a new method for extracting oryzanol from rice bran crude oil—solvent countercurrent extraction method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 100L of the tested rice bran crude oil, the content of oryzanol is 2.2%, add it to 500L of petroleum ether and 200L of ethanol, stir, adjust the solvent with sodium hydroxide—the pH value of the rice bran oil mixture liquid is 10, let stand and separate After 30 minutes, the lower layer of feed liquid was separated, and the feed liquid was extracted with 200L petroleum ether. After the pH value of the feed liquid was adjusted to 7 with sulfuric acid, the extract of upper layer petroleum ether-oryzanol was obtained by layering. After repeated extraction for 4 times, the first two The second petroleum ether feed liquid is removed to recover the solvent to obtain 1.8 kilograms of crude oryzanol, and the next extraction is applied mechanically for the last three times. Rough oryzanol is decolorized with 10% activated carbon to obtain 1.6 kg of finished oryzanol.

Embodiment 2

[0018] Repeat the operation of Example 1, increase the crude rice bran oil in Example 1 to 1200L, repeat the follow-up process, and finally get 21.1 kilograms of rough oryzanol and 19.2 kilograms of finished oryzanol.

Embodiment 3

[0020] Repeat the operation of Example 1, change the sherwood oil in Example 1 into solvent naphtha 500L, repeat subsequent steps, finally get 1.7 kilograms of rough oryzanol, 1.6 kilograms of finished oryzanol.

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Abstract

The invention discloses a novel method for extracting oryzanol from crude rice bran oil. The crude rice bran oil is subjected to counter-current extraction through an ether nonpolar solvent and a polar alcohol solvent, the pH value of the solution is adjusted according to the solubility difference of the oryzanol in different solvents so as to separate the oryzanol from rice bran oil and fatty acid, the oryzanol is subjected to secondary extraction through the ether nonpolar solvent and is adjusted through an acid to obtain a rough oryzanol product. The rough product is refined and decolorized to obtain a finished oryzanol product. The novel method is high in oryzanol yield, little in oil loss and is capable of avoiding environmental pollution caused by nigre and saving the production cost, thereby having an excellent economic benefit.

Description

technical field [0001] The invention relates to a new method for extracting oryzanol from crude rice bran oil. Background technique [0002] Oryzanol mainly exists in rice bran crude oil and its oil foot, and the content of oryzanol in the rice bran layer is 0.3-0.5%. When rice bran is heated and pressed, oryzanol is dissolved in crude oil, and the content of oryzanol in general rice bran crude oil is about 1.5% to 3%. Its content varies slightly with the climatic conditions of rice planting, rice varieties and rice bran oil production process conditions: the oryzanol content of rice bran in cold zone rice is higher than that of tropical rice; high. Among many vegetable oils, such as corn germ oil, wheat germ oil, barley bran oil, rapeseed oil, etc., rice bran crude oil has the highest oryzanol content, so oryzanol is mostly extracted from rice bran crude oil. [0003] At present, most of the major domestic oryzanol manufacturers adopt the production process of alkali dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J53/00
Inventor 王小贵张锦红陈燕飞
Owner ZHEJIANG DELEKANG FOOD CO LTD
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