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High-oryzanol rice bran oil two-phase extraction de-acidification refining technology

A technology for extracting deacidification and rice bran oil, which is applied in the direction of oil/fat refining, edible oil/fat, fat production, etc., can solve the problems affecting the oil refining yield, loss of functional components, loss of oryzanol, etc., to achieve good taste, The effect of less investment in equipment and product quality control

Inactive Publication Date: 2011-03-09
HUNAN AGRICULTURAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional deacidification method adopts alkali refining deacidification method, which can reduce the acid value of rice bran oil to the specified requirement, but the action of alkali makes most of the oryzanol loss, and the unique oryzanol functional components of rice bran are lost; at the same time, alkali refining also produces a large amount of oil Feet, seriously affecting the oil refining yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 100kg of rice bran crude oil and filter to remove solid impurities, heat it to 70-80℃, add 0.2kg of phosphoric acid, keep stirring for 30 minutes, then add 5kg of hot water at the same temperature, continue stirring for 1 hour, let it stand for 4 hours and then centrifuge to degummed; Add absolute ethanol and n-hexane to extract the degummed crude rice bran oil 3 times. The ratio of the volume of the absolute ethanol and n-hexane added each time to the weight of the extracted rice bran crude oil is 1.5ml: 2ml: 1g, each time The extraction time is 10 minutes, and then the extractant is removed by fractional distillation to obtain deacidified rice bran oil; then the rice bran oil is dehydrated in a vacuum drying oven at a vacuum of 8000pa and 120°C for 1 hour; in the dehydrated rice bran oil Add 5% of oil weight activated clay and 0.7% activated carbon, decolorize for 50 minutes at 85°C and 70r / min stirring speed, then vacuum filter (vacuum 7000pa) to obtain decolorize...

Embodiment 2

[0023] Take 100kg of rice bran oil and filter to remove solid impurities, heat it to 70-80℃, add 0.3kg of phosphoric acid, keep stirring for 28 minutes, then add 6kg of hot water at the same temperature, continue to stir for 1.5 hours, let it stand for 6 hours and then centrifuge to degummed; The degummed crude rice bran oil is extracted by adding methanol and propane 4 times. The weight ratio of the volume of methanol and propane added each time to the extracted crude rice bran oil is 1.2ml:1.5ml:1g, and each extraction time is 15 minutes. Re-separate distillation to remove the extractant to obtain deacidified rice bran oil; then the rice bran oil is dehydrated in a vacuum drying box at a vacuum of 6000pa and 100°C for 2 hours; added to the dehydrated rice bran oil to make 6% of the oil weight Activated clay and 1% activated carbon, decolorized for 40 minutes at 80℃, stirring speed 80r / min, then vacuum filtration (vacuum 9000pa) to obtain decolorized rice bran oil; decolorized ...

Embodiment 3

[0025] Take 100kg of rice bran crude oil and filter to remove solid impurities, heat it to 70-80℃, add 0.1kg of phosphoric acid, keep stirring for 32 minutes, then add 4kg of hot water at the same temperature, continue to stir for 0.5 hours, leave it for 3 hours, then centrifuge to degummed; The degummed crude rice bran oil is extracted 5 times by adding 95% volume concentration of ethanol and No. 6 solvent oil. The weight ratio of the volume of 95% volume concentration of ethanol and #6 solvent oil added each time to the extracted rice bran crude oil is 1ml: 1ml: 1g, each extraction time is 20 minutes, and then separate distillation to remove the extractant to obtain deacidified rice bran oil; then the rice bran oil is dehydrated under the conditions of vacuum 7000pa and 80℃ for 3 hours; the dehydrated rice bran Add 4% of the oil weight of activated clay and 0.5% of activated carbon to the oil, decolorize for 60 minutes at 90°C and a stirring speed of 60r / min, and then vacuum f...

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Abstract

A high-oryzanol rice bran oil two-phase extraction de-acidification refining technology includes processes of degumming with phosphoric acid, centrifugal separation, two-phase extraction de-acidification, separatory distillation for solvent removal, vacuum drying, adsorptive de-coloration, deodorization, de-waxing and the like. The refined rice bran oil produced by the technology is clear, transparent and odour free, and has good tastes, Physical and Chemical characters of acid value and the like of the refined rice bran oil are in accordance with the second grade of national edible oil standard, and simultaneously, content of the produced rice bran oil is more than 1.5%. The whole technology is simply, few devices are invested for the technology, the rice bran oil products have high yield and purity, product quality can be easily controlled, and a new way for producing high-quality nutritious rice bran oil is provided.

Description

Technical field: [0001] The invention relates to the field of food, in particular to a deep processing technology of rice bran oil, a high-quality vegetable oil resource for food production. Background technique: [0002] The content of natural antioxidant oryzanol (a mixture of ferulic acid esters composed of triterpene alcohols and plant sterols) in crude rice bran oil is usually about 2%. It is precisely because of the presence of oryzanol that the processed rice bran oil has the ability to prevent lipid oxidation. , Anti-hyperlipidemia, inhibit autologous synthesis of cholesterol, promote growth and development and other functional effects. In addition, the fatty acid composition of rice bran oil contains about 38% of linoleic acid and about 42% of oleic acid, and the ratio of linoleic acid to oleic acid is about 1:1.1, which is in line with the viewpoint of modern nutrition. The human body absorption rate of rice bran oil is more than 90%. Therefore, rice bran oil can be d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/04C11B3/10A23D9/04
Inventor 吴卫国李超杨文风邵国武
Owner HUNAN AGRICULTURAL UNIV
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