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Extraction method of millet bran crude oil

An extraction method and grain bran technology are applied in the field of extraction of millet bran crude oil, which can solve the problems of millet bran being easily corrupted, difficult to store and transport, and the extraction rate of millet bran oil is low, and achieves good anti-oxidative stability, The effect of strong operability and low cost

Inactive Publication Date: 2015-02-25
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that millet bran is easily corrupted and deteriorated in a short period of time, is not easy to store and transport, and the extraction rate of millet bran oil is low in the prior art, the present invention provides a method for extracting millet bran crude oil

Method used

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  • Extraction method of millet bran crude oil
  • Extraction method of millet bran crude oil
  • Extraction method of millet bran crude oil

Examples

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Effect test

Embodiment 1

[0026] A method for extracting millet bran crude oil, comprising the following steps:

[0027] 1) Weigh 500g of fresh millet bran and pass it through a 100-mesh sieve to remove impurities;

[0028] 2) Evenly spread the removed millet bran on the tray with a thickness of 2cm, and then use 100°C steam for 2 minutes;

[0029] 3) Evenly spray the ethanol solution of vitamin E accounting for 1% of the weight of the millet bran on the millet bran after the high-temperature steam treatment (the mass fraction of vitamin E in the ethanol solution of vitamin E is 1%);

[0030] 4) Vacuum drying at 50°C until the moisture content of millet bran is 8.13%;

[0031] 5) After cooling to room temperature, extract with n-hexane / ethanol mixed solvent (the volume ratio of n-hexane and ethanol is 1:1) at 40°C for 2 hours, wherein the solid-liquid ratio of millet bran and n-hexane / ethanol mixed solvent is 1:5, after the extraction, the solvent was removed by rotary evaporation to obtain crude mil...

Embodiment 2

[0036] A method for extracting millet bran crude oil, comprising the following steps:

[0037] Step 1)-step 4) with embodiment 1

[0038] Step 5): After cooling to room temperature, extract with n-hexane / ethanol mixed solvent (the volume ratio of n-hexane and ethanol is 3:1) at 40°C for 2 hours, wherein, millet bran and n-hexane / ethanol mixed solvent feed liquid The ratio is 1:5, and after the extraction is completed, the solvent is removed by rotary evaporation to obtain crude millet bran oil.

[0039] The quality of millet bran oil obtained in this example is 100.05g, and the extraction rate is 20.01%. The obtained rice bran oil is measured by the method specified in GB / T5530-2005. - Measured by the method stipulated in 2005, its peroxide value is 0.023g / 100g. GC-MS analysis showed that the content of unsaturated fatty acid in crude bran oil was about 84%. GC-MS component analysis of millet bran crude oil obtained in this example see figure 2 .

[0040] Table 2 Compone...

Embodiment 3

[0043] A method for extracting millet bran crude oil, comprising the following steps:

[0044] Steps 1), 3), 4), and 5) are the same as in Example 2;

[0045] Step 2): Spread the removed millet bran evenly on a tray with a thickness of 2 cm, and then use 100°C steam for 4 minutes at high temperature.

[0046] The quality of the millet bran crude oil obtained in this example is 100.21g, and the extraction rate is 20.04%. The obtained rice bran crude oil is measured by the method specified in GB / T5530-2005, and its acid value is 2.7mg KOH / g. - Measured by the method stipulated in 2005, its peroxide value is 0.038g / 100g. GC-MS analysis showed that the unsaturated fatty acid content of crude bran oil was about 85.1%.

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Abstract

The invention discloses an extraction method of millet bran crude oil and aims at solving the problem that bran is prone to decay and deteriorate within short time and not easy to store and transport and the problem of low millet bran oil extraction low. The extraction method comprises the following steps: 1) screening and removing impurities; 2) spreading the millet bran and performing high-temperature treatment on the spread millet bran by use of water vapor; 3) spraying the ethanol solution of vitamin E to the millet bran; 4) drying in vacuum until the moisture content of the millet bran is lower than 10%; 5) extracting by use of the mixed solvent of normal hexane and ethanol, and then removing the solvent to obtain the millet bran crude oil. Due to the synergistic effect of normal hexane which has high extraction efficiency to oils and ethanol which has a good extraction effect on active ingredients such as vitamin E and squalene, the extraction efficiency is high, and the millet bran crude oil is high in unsaturated fatty acid content and good in antioxidant stability. The extraction method of the millet bran crude oil is simple, low in cost and good in operability; the extraction rate is high which is above 18%, and the oleic acid of the extracted millet bran crude oil is below 3.87mgKOH / g.

Description

technical field [0001] The invention relates to the technical field of edible oil extraction, in particular to a method for extracting millet bran crude oil. Background technique [0002] Millet bran is a by-product of millet husking and processing into refined millet, which has high nutritional value and high yield. The oil content of millet bran is as high as 15-20%. Corn bran oil is a vegetable oil with high nutritional value. The content of unsaturated fatty acids accounts for more than 70%. High in vitamin E, active lipase, sitosterol, campesterol, stigmasterol, squalene and three ferulic acid ester antioxidants and other plant active ingredients. Corn bran oil has a good cosmetic effect. In addition, it also has the effects of expelling wind, relieving itching, and astringent. [0003] my country is rich in bran resources, but fresh millet bran is not suitable for storage, it is prone to rancidity and deterioration under the action of lipase, which will greatly redu...

Claims

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Application Information

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IPC IPC(8): C11B1/10A23D9/02
CPCC11B1/10A23D9/02C11B1/025C11B1/04
Inventor 崔波马蕴欣檀琮萍于滨
Owner QILU UNIV OF TECH
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