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

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

Inactive Publication Date: 2012-07-04
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

[0022] Take 100kg of rice bran crude oil and filter to remove solid impurities, heat to 70-80°C, 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 centrifuge to degumming; Add absolute ethanol and normal hexane to extract the rice bran crude oil after degumming 3 times, the ratio of the volume of each added absolute alcohol and normal hexane 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 deacidified rice bran oil is obtained by liquid separation and distillation to remove the extractant; then the rice bran oil is dehydrated in a vacuum drying oven for 1 hour at a vacuum degree of 8000pa and 120°C; in the dehydrated rice bran oil Add 5% activated clay and 0.7% gac for oil weight, decolorize for 50 minutes at 85°C and stirring speed of 70r / min, and then obtain decolorized rice bran...

Embodiment 2

[0024] Take 100kg of crude rice bran oil and filter to remove solid impurities, heat to 70-80°C, add 0.3kg of phosphoric acid, keep stirring for 28 minutes, then add 6kg of hot water at the same temperature, continue stirring for 1.5 hours, and then centrifuge for degumming after standing for 6 hours; Add methanol and propane to extract the degummed rice bran crude oil 4 times, the volume of methanol and propane added each time and the weight ratio of the extracted rice bran crude oil are 1.2ml: 1.5ml: 1g, and each extraction time is 15 minutes. Then liquid separation and distillation to remove the extractant to obtain deacidified rice bran oil; then dehydrate the rice bran oil in a vacuum drying oven at a vacuum degree of 6000pa and 100°C for 2 hours; add to the dehydrated rice bran oil to make the oil weight 6% Activated clay and 1% activated carbon were decolorized for 40 minutes at 80°C and a stirring speed of 80r / min, and then vacuum filtration (vacuum degree 9000pa) was u...

Embodiment 3

[0026] Take 100kg of crude rice bran oil and filter to remove solid impurities, heat to 70-80°C, add 0.1kg of phosphoric acid, keep stirring for 32 minutes, then add 4kg of hot water at the same temperature, continue stirring for 0.5 hours, and then centrifuge for degumming after standing for 3 hours; Add 95% volume concentration of ethanol and No. 6 solvent oil to extract the rice bran crude oil after degumming 5 times, the volume of the 95% volume concentration of ethanol and No. 6 solvent oil added each time and the weight ratio of the extracted rice bran crude oil are 1ml: 1ml: 1g, each extraction time is 20 minutes, and then separate liquid distillation to remove the extractant to obtain deacidified rice bran oil; then dehydrate the rice bran oil at a vacuum degree of 7000pa and 80°C for 3 hours; Add 4% activated clay and 0.5% gac to the oil, decolorize for 60 minutes at 90°C and a stirring speed of 60r / min, and then vacuum filter (vacuum degree 5000pa) to obtain decoloriz...

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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 high-quality vegetable oil resource rice bran oil used for food production. Background technique: [0002] The content of natural antioxidant oryzanol (a mixture of ferulic acid esters composed of triterpene alcohols and phytosterols) 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, inhibition of autosynthesis of cholesterol, and promotion of growth and development. In addition, the fatty acid composition of rice bran oil contains about 38% linoleic acid and about 42% oleic acid, and the ratio of linoleic acid to oleic acid is about 1:1.1, which is in line with the modern nutritional point of view. The human body absorption rate of rice bran oil is more than 90%. Therefore, rice bran oil can be developed as a nutr...

Claims

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Application Information

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Patent Type & Authority Patents(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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