A kind of preparation method of rice bran oil with low acid value

A technology of rice bran oil and low acid value, which is applied in the fields of fat oil/fat refining, edible oil/fat, fat oil/fat production, etc. It can solve the problems of scattered production enterprises, difficult deep processing value-added, low added value, etc.

Inactive Publication Date: 2011-12-28
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as my country's current situation is concerned, the annual output of rice bran is very large. Because rice bran is prone to rancidity and deterioration, and domestic production enterprises are scattered, the production scale is not large, and it is difficult to concentrate on deep processing and value-added. Only a small amount is used to prepare rice bran oil. Most of the rice bran It is only used locally as feed, with low added value
[0003] CN101781605A disclosed a refining method of rice bran oil on July 21, 2010, mainly using crude rice bran oil (acid value 30mg / g) as raw material, after degumming, oil foot separation, dewaxing, decolorization, high temperature deacidification, Deodorization, freezing and degreasing to obtain refined rice bran oil, the process is relatively complicated, the requirements for process conditions are high, and the required cost is also high, and the acid value of the obtained refined rice bran oil can only reach 3mg / g

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment includes the following steps:

[0019] (1) Preservation of rice bran: add EDTA equivalent to 0.9% of rice bran weight, 0.09% papain, and 10 times the amount of water to fresh rice bran, and stir evenly;

[0020] (2) Extraction of rice bran oil: Extract oil from the rice bran-water mixture that has undergone fresh-keeping treatment in step (1) by Soxhlet extraction, using petroleum ether as the extraction reagent, and extracting at a temperature of 70°C for 6 hours;

[0021] (3) Degumming and dewaxing: Put 500g of crude rice bran oil extracted in step (2) into a 1000mL beaker, stir with a magnetic heating stirrer and heat to 75°C, the stirring speed is 70r / min, and the stirring time is 30min , and then use a Buchner funnel with ordinary filter paper to filter; add hot water at the same temperature equivalent to 5% of the oil weight to the filtered oil, stir at a speed of 200r / min for 30min, and then add to the oil-water mixture 1% calcium chloride soluti...

Embodiment 2

[0027] This embodiment includes the following steps:

[0028] (1) Preservation of rice bran: add 0.8% EDTA equivalent to the weight of rice bran, 0.08% papain, and 8 times the amount of water to fresh rice bran, and stir evenly;

[0029] (2) Extraction of rice bran oil: Soxhlet extraction is performed on the fresh-keeping rice bran in step (1), using isopropanol as the reagent, and the extraction temperature is 80°C for 4 hours;

[0030] (3) Degumming and dewaxing: put 500g of crude rice bran oil extracted in step (2) into a 1000mL beaker, stir with a magnetic heating stirrer and heat to 80°C, the stirring speed is 80r / min, and the stirring time is 20min , and then use a Buchner funnel with ordinary filter paper to filter; add hot water at the same temperature equivalent to 6% of the oil weight to the filtered oil, stir at a speed of 250r / min for 20min, and then add an oil-water mixture 1.2% calcium chloride solution with a mass concentration of 6.2%, and continue to stir at ...

Embodiment 3

[0036] This embodiment includes the following steps:

[0037] (1) Preservation of rice bran: add EDTA equivalent to 1.0% of the weight of rice bran, 0.1% papain, and 12 times the amount of water to fresh rice bran, and stir evenly;

[0038] (2) Extraction of rice bran oil: extract oil from the rice bran-water mixture that has undergone fresh-keeping treatment in step (1) by Soxhlet extraction, using diethyl ether as the extraction reagent, and extracting at 60°C for 8 hours;

[0039](3) Degumming and dewaxing: put 500g of crude rice bran oil extracted in step (2) into a 1000mL beaker, stir with a magnetic heating stirrer and heat to 70°C, the stirring speed is 60r / min, and the stirring time is 40min , and then use a Buchner funnel with ordinary filter paper to filter it; add hot water at the same temperature with 4% oil weight to the filtered oil, stir at a speed of 150r / min for 40min, and then add the oil-water mixture to the oil-water mixture 0.8% calcium chloride solution ...

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PUM

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Abstract

The invention provides a preparation method of rice bran oil with the low acid value, which comprises the following steps: fresh-keeping the rice bran, extracting the rice bran oil, degumming, de-waxing, decolouring, deacidifying and deodorizing. The invention has the advantages of simple technology and low production cost; since the extracted crude rice bran oil is performed a fresh-keeping treatment, the acid value is relative low. The final finished product rice bran oil treated by the above steps is detected by a method prescribed by GB/T5530-2005, the acid value is between 1.0-3.0 (KOH) (mg/g).

Description

technical field [0001] The invention relates to a method for preparing rice bran oil, in particular to a method for preparing rice bran oil with low acid value. Background technique [0002] Rice bran oil is a nutritious vegetable oil. It has become another health food oil after sunflower oil and corn germ oil. Long-term consumption of rice bran oil can prevent cardiovascular and cerebrovascular diseases, promote metabolism and anti-aging, etc. Function. As far as my country's current situation is concerned, the annual output of rice bran is very large. Because rice bran is prone to rancidity and deterioration, and domestic production enterprises are scattered, the production scale is not large, and it is difficult to concentrate on deep processing and value-added. Only a small amount is used to prepare rice bran oil. Most of the rice bran It is only used locally as feed, with low added value. [0003] CN101781605A disclosed a refining method of rice bran oil on July 21, 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/00C11B1/04C11B1/10C11B3/00C11B3/06A23D9/02
Inventor 喻凤香林亲录吴跃杨涛吴伟李丽辉王青云肖华西
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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