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Method for refining nutritional millet bran oil

A processing method and technology of nutritional oil, applied in the directions of edible oil/fat, food science, application, etc., can solve the problems of the destruction of nutrients such as vitamin E and sterols, the loss of vitamin E and oryzanol, and the destruction of active substances, and achieve deacidification. High efficiency, simple process, good deacidification effect

Active Publication Date: 2013-04-10
阳泉市好益农农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: ① the soapstock will take out most of the oryzanol in the oil, resulting in the loss of a large amount of nutrients; ② the addition of lye will cause the destruction of active substances such as vitamin E and oryzanol; ③ the formed soapstock contains a large amount of medium neutral oil, resulting in excessive loss of neutral oil
In the traditional alkali refining deacidification process, the addition of lye will cause a large loss of vitamin E and oryzanol; while high-temperature steam distillation deacidification will cause the destruction of vitamin E and sterols and other nutrients

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get 500g of millet bran crude oil obtained by solvent leaching, the acid value is 9mgKOH / g, the content of vitamin E and oryzanol is 765mg / kg and 0.35% respectively, and the phospholipid content is 1.5%. Inject the crude oil into the refining device, seal and heat to 55°C, then evacuate to 0.086MPa vacuum degree, add 20% citric acid solution 2 g, after stirring for 3 minutes, add 3 g (0.4 times the phospholipid content in the oil) of hot water at 55°C, and stir for 35 minutes under a vacuum of 0.080 MPa; keep it for 5 hours under normal pressure, and remove the gum in the lower layer. Add ethanol-isopropanol extractant (ethanol:isopropanol = 9:1) with a pH value of 6.0 and a concentration of 85% to the degummed oil, vacuum extraction and deacidification twice at 35°C, and keep the vacuum degree at 0.078-0.080 MPa; the weight of the extractant added for each deacidification is 900 g, and the vacuum stirring time for each extraction is 30 min; after the stirring is comple...

Embodiment 2

[0022] Take CO 2 The crude millet bran oil obtained by supercritical extraction is 800g, the acid value is 14mgKOH / g, the contents of vitamin E and oryzanol are 883mg / kg and 0.42%, respectively, and the phospholipid content is 0.8%. Inject the crude millet bran oil into the vacuum refining device, heat it to 65°C and then evacuate it to 0.080 MPa, add 3.0 g of 20% citric acid solution, stir for 4 minutes, add 5.1 g (0.8 times the phospholipid content in the crude oil) ) of 65°C hot water, stirred for 20 minutes under a vacuum of 0.074MPa; after standing for 6 hours at normal pressure and heat preservation, the lower colloid was removed; the degummed crude oil was added with a pH value of 5.5 and a concentration of 9 5% ethanol-isopropanol extractant (ethanol: isopropanol = 12:1), extract and deacidify 3 times at 25°C and 0.080-0.082MPa vacuum, each time the weight of the extractant is 1200g; each time The extraction was stirred for 20 min, and after the extraction, it was lef...

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PUM

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Abstract

The invention provides a method for refining nutritional millet bran oil. The method is suitable for processing nutritional millet bran oil by taking the crude millet bran oil obtained by CO2 supercritical extraction, press or solvent leaching as a raw material. The method comprises the following steps: adding a citric acid solution accounting for 0.2-0.4% of the oil weight into the crude millet bran oil and carrying out vacuum stirring to remove gums; taking 80-95% ethanol-isopropanol with the pH value of 5.0-6.5 as an extractant to deacidify degummed oil through vacuum stirring; and washingdeacidified oil with a sodium citrate solution and clear water and drying and dewaxing the washed deacidified oil, thus obtaining the nutritional millet bran oil product. The method has the followingadvantages: the acid value of the obtained nutritional millet bran oil is below 2mgKOH / g; and the preservation rates of vitamin E and oryzanol in the oil are respectively above 85% and above 75%.

Description

technical field [0001] The invention relates to an edible oil processing method, in particular to a method for refining and processing millet bran nutrient oil by using millet bran crude oil as a raw material. Background technique [0002] Millet bran is a by-product of millet processing millet, which is composed of millet peel, seed coat, aleurone layer and rice germ. Studies have found that millet bran contains 14-16% oil. In millet bran crude oil, unsaturated fatty acids account for 89.26% of the total fatty acid content, of which the content of linoleic acid exceeds 70%, the content of oleic acid is 14%, and the content of α-linolenic acid is 3-4%. In addition, it also contains Vitamin E66-80 mg / 100g, sterols 1.1-1.5%, oryzanol 0.3-0.5%. Oryzanol has physiological functions such as lowering serum cholesterol, preventing lipid oxidation, and preventing cardiovascular diseases, and is easily soluble in alkaline and neutral non-polar solutions. Vitamin E is an essential ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23D9/04
Inventor 王常青
Owner 阳泉市好益农农业科技有限公司
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