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Method for continuously preparing millet bran coat crude oil and alcohol soluble protein

A technology for gliadin and grain bran is applied in the field of continuous preparation of millet grain bran crude oil and gliadin, which can solve the problems of low extraction rate of crude oil, low extraction efficiency, cumbersome steps, etc. Faster extraction time and simpler operation

Inactive Publication Date: 2017-06-20
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the authorized or published related patents are aimed at the extraction of a certain component of millet bran. The extracted millet bran is often not available, which also causes a waste of resources and cannot achieve full utilization of millet bran.
The published patent (CN201610052722.0) discloses a method for synchronously extracting rice bran oil and rice bran protein from millet bran. Low rate and other deficiencies
In summary, the existing millet bran comprehensive processing and utilization method has the disadvantages of single extraction product and low extraction efficiency. Therefore, the present invention intends to continuously extract millet bran crude oil and prolamin in order to solve the above problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Take 2kg of fresh millet bran, sieve and remove impurities;

[0032] (2) Prepare an ethanol solution with a concentration of 65%, add sodium chloride to a solution mass concentration of 2%, dissolve and mix, and adjust the pH of the mixed solution system to 9;

[0033] (3) Carry out a countercurrent extraction, the mass ratio of the millet bran to the volume of the extraction solution is 1:3;

[0034] (4) Separation of the solid-liquid mixture by suction filtration to obtain the mixed liquid, which is subjected to rotary evaporation treatment, and the temperature is controlled at 45°C;

[0035] (5) The obtained mixture is subjected to secondary countercurrent extraction, the extract is a mixture of n-hexane and ether, the volume ratio of n-hexane and ether is 2:1, and the solid-liquid ratio is selected as 1:3; wherein, the solid-liquid ratio refers to The mass ratio of the mixture of millet bran oil and prolamin obtained in step (4) to the volume of the extract.

...

Embodiment 2

[0039] (1) Take 2kg of fresh millet bran, sieve and remove impurities;

[0040] (2) Prepare an ethanol solution with a concentration of 60%, and add sodium chloride to a solution mass concentration of 1.5%, dissolve and mix, and adjust the pH of the mixed solution system to 9;

[0041] (3) Carry out a countercurrent extraction, the mass ratio of the millet bran to the volume of the extraction solution is 1:3;

[0042] (4) Separation of the solid-liquid mixture by suction filtration to obtain the mixed liquid, which is subjected to rotary evaporation treatment, and the temperature is controlled at 45°C;

[0043] (5) The obtained mixture is subjected to secondary countercurrent extraction, the extract is a mixture of n-hexane and ether, the volume ratio of n-hexane and ether is 2:1, and the solid-liquid ratio is selected as 1:3; the solid-liquid ratio refers to the step ( 4) The mass ratio of the mixture of millet bran crude oil and prolamin obtained in to the volume ratio of t...

Embodiment 3

[0047] (1) Take 2kg of fresh millet bran, sieve and remove impurities;

[0048] (2) Prepare an ethanol solution with a concentration of 65%, add sodium chloride to a solution mass concentration of 2%, dissolve and mix, and adjust the pH of the mixed solution system to 10;

[0049] (3) Carry out a countercurrent extraction, the mass ratio of the millet bran to the volume of the extraction solution is 1:5;

[0050] (4) Separation of the solid-liquid mixture by suction filtration to obtain the mixed liquid, which is subjected to rotary evaporation treatment, and the temperature is controlled at 50°C;

[0051] (5) The obtained mixture is subjected to secondary countercurrent extraction, the extract is a mixture of n-hexane and ether, the volume ratio of n-hexane and ether is 1:1, and the solid-liquid ratio is selected as 1:5; wherein, the solid-liquid ratio refers to The mass ratio of the mixture of millet bran oil and prolamin obtained in step (4) to the volume of the extract. ...

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Abstract

The invention belongs to the comprehensive utilization field of agricultural product byproducts, and in particular relates to a method for continuously preparing millet bran coat crude oil and alcohol soluble protein. The method comprises the following steps: (1) millet bran coat screening and impurity-removing cleaning; (2) preparing of an extraction solution; (3) counter-current extraction; (4) solid-liquid separated millet bran coat crude oil and alcohol soluble protein mixture; (5) secondary extraction; (6) secondarily separated alcohol-soluble protein crude extract; (7) rotary-evaporation to obtain the millet bran coat crude oil. By use of the method of extracting twice, the grease and the alcohol-soluble protein in the millet bran coat are successively extracted, so the comprehensive utilization efficiency of the millet bran coat is improved; and meanwhile, the counter-current extraction method is use for extracting the bran coat, the extraction time is greatly shortened in comparison with that of the traditional solvent lixiviation method, the operation is simple, and the extraction rate is high.

Description

[0001] (1) Technical field [0002] The invention belongs to the field of comprehensive utilization of agricultural product processing by-products, in particular to a method for continuously preparing millet bran crude oil and gliadin. [0003] (2) Background technology [0004] Millet bran is a mixture of the seed coat, aleurone layer and rice germ that are shed during millet milling, accounting for about 8-12% of millet, but the nutrient content in it is opposite to that of millet. Millet contains Nutrients with health value are mostly contained in millet bran. The main components of millet bran are: 16-20% protein, 26-32% starch, and 16-18% fat. In addition, there are active ingredients such as cellulose, polysaccharides, mineral elements, oryzanol, thiamine, riboflavin, and squalene. The annual output of millet bran is about 2 million tons, which is quite considerable. However, due to the constraints of technology and other conditions, it has been used as cheap animal fee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/10C07K14/415C07K1/14
CPCC07K14/415C11B1/04C11B1/102
Inventor 崔波于滨檀琮萍侯召华马蕴欣
Owner QILU UNIV OF TECH
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