Method for preparing rice bran crude oil from rice bran

A technology for rice bran crude oil and rice bran, which is applied in the directions of edible oil/fat, fat oil/fat production, and fat oil/fat refining, etc., can solve the problems of low wax content and the like

Inactive Publication Date: 2013-12-18
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that rice bran oil maintains good nutritional value of oil under the premise of high extraction rate, the object of the present invention is to provide a method for preparing rice bran oil from rice bran at low temperature, and the physiologically active substances (such a

Method used

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Experimental program
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Example Embodiment

[0009] Specific embodiment 1: A method for preparing crude rice bran oil from rice bran, characterized in that the method for extracting crude rice bran oil rich in physiologically active substances and low in bran wax with n-hexane under low temperature conditions is achieved by the following steps: 1. Rice bran Preparation of crude oil: Weigh 100g of puffed rice bran, use n-hexane which has the properties of hot dissolving and cooling out of bran wax as a solvent, and put the puffed rice bran suspension with a material-to-liquid ratio of 1:1 to 1:5 into the plug Put the conical flask into the magnetic stirrer, set the extraction temperature to 10~30℃, after 1~3h extraction time, put the suspension into the centrifuge tube, put it in the explosion-proof centrifuge, 3000r / Centrifuge for 15 min under the condition of min, take the supernatant liquid, pour the supernatant liquid into the rotary evaporator, evaporate the rice bran oil for 15 min under the conditions of 60℃ in wate...

Example Embodiment

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the puffed rice bran and n-hexane are added to a stoppered Erlenmeyer flask at a ratio of 1:1 to 1:5 for low-temperature extraction of rice bran hair Oil, other steps are the same as in the first embodiment.

Example Embodiment

[0011] Specific embodiment three: this embodiment is different from specific embodiment one in that in step one, the puffed rice bran and n-hexane are added to the conical flask with stopper in a ratio of 1:1 to 1:5, and the extraction temperature is 10 The low-temperature extraction of crude rice bran oil is carried out at ~30°C, and the other steps are the same as in the first embodiment.

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Abstract

The invention relates to a method for preparing rice bran crude oil from rice bran, and particularly relates to a method for preparing low-bran wax rice bran crude oil rich in physiologically active substances from the rice bran at a low temperature. The lixiviation of the existing rice bran oil mostly pursues high extraction rate purely and ignores the influence of process conditions on oil characteristics. In order to solve the problem of how to keep good nutritive value of oil on the premise of obtaining high extraction rate during bran oil extraction, the method is as follows: the rice bran crude oil is extracted by adopting a low-temperature extraction process. According to the invention, the oryzanol and tocopherol content of the rice bran crude oil lixiviated under the condition of 20 DEG C is far higher than that of the rice bran crude oil lixiviated at a high temperature, in such a way, the nutritive value of the rice bran oil can be effectively enhanced; in addition, waxes are difficult to separate out and enter the rice bran crude oil under the condition of low temperature according to the hot melting and cold separating principle of the bran waxes on n-hexane, so that the quality, such as transparency, smell and color, of the rice bran oil is enhanced, and the separation of the physiologically active substances during wax freezing treatment is reduced.

Description

technical field [0001] The invention relates to a method for preparing rice bran crude oil rich in physiologically active substances and low in bran wax from rice bran at low temperature. Background technique [0002] Rice bran accounts for about 5% to 5.5% of the weight of rice, and rice germ accounts for about 2.5%. Crude rice bran oil can be extracted from rice bran, a special oil plant, and refined to obtain edible rice bran oil with nutritional and health functions. Rice bran oil is a nutrient-rich vegetable oil with high content of unsaturated fatty acids, the best ratio of oleic acid and linoleic acid at 1:1, and rich in natural active ingredients such as oryzanol, tocopherol and tocotrienol, And the absorption rate after eating is over 90%. Rice bran oil contains about 2% to 5% wax. Bran wax is insoluble in water, ethanol, etc., but it has the property of hot melting and cold analysis for some solvents such as n-hexane, isopropanol, No. 6 solvent, that is, when he...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B3/12A23D9/04
Inventor 于殿宇王铭义江连洲王立琦邹小雨
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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