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Method for extracting rice bran oil from rice bran

A technology for rice bran oil and rice bran, which is applied in the field of extracting vegetable oil, can solve the problems of easy rancidity and deterioration, high technological requirements and low added value, and achieves the effects of reducing production cost, improving nutritional value and increasing added value.

Active Publication Date: 2016-02-24
贵州侗乡生态农业科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as my country's current situation is concerned, the annual production of rice bran is very large. Because rice bran is prone to rancidity and deterioration, and domestic production enterprises are scattered and the production scale is small, it is difficult to concentrate rice bran for deep processing and value-added. Only a small amount is used to prepare rice bran oil. , so that the rice bran oil can be comprehensively utilized, and the reutilization of its nutritional value can be improved, but a large amount of rice bran is only used as feed for pigs, cattle, sheep and other livestock, and its added value is very low. Therefore, it is necessary to use rice bran as a raw material Production of rice bran oil provides a viable solution
[0003] Therefore, a large number of researchers have made contributions in extracting rice bran oil from rice bran. For example, the patent No. CN101781605A "A Refining Method of Rice Bran Oil" discloses that crude rice bran oil is mainly used as raw material with an acid value of 30 mg / g. After degumming, oil foot separation, dewaxing, decolorization, high temperature deacidification, deodorization, and freeze degreasing, refined rice bran oil is obtained. The process is relatively complicated, the process conditions are high, and the required cost is high. The acid value of rice bran can only reach 3mg / g; Therefore, another researcher, from the perspective of the above technical problems, discloses the method of preparing rice bran oil with low acid value in the patent No. CN102295986A through rice bran preservation, wool Rice bran oil extraction, degumming, dewaxing, decolorization, deacidification, deodorization and other steps, after the acid value of fresh rice bran is processed, the raw material is guaranteed for the follow-up process operation and the quality of rice bran oil, so that the acid value of the finished product is within 1 Between -3mg / g, it can be seen that the acid value of the finished product is not ideal, the production process is relatively complicated, and the production cost is relatively high

Method used

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  • Method for extracting rice bran oil from rice bran

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Embodiment 1

[0029] A method for extracting rice bran oil from rice bran, comprising the following steps:

[0030] (1) Rice bran pretreatment: Add sorbic acid accounting for 0.6% by weight of rice bran to rice bran, add 6 times of water, stir evenly, and then pass through a 145-mesh sieve;

[0031] (2) Extract crude bran oil: Add the rice bran water mixture pretreated in step 1 with 30% n-hexane and rice bran water mixture at a volume ratio of 1:5, carry out puffing and oil immersion treatment, during the extraction process The extraction temperature in the medium is 65°C, and the extraction time is 5.5 hours to obtain crude bran oil;

[0032] (3) Alkali refining of crude bran oil: using 20% ​​sodium hydroxide, alkali refining of crude bran oil at a temperature of 50°C, the amount of crude bran oil exceeding sodium hydroxide is 0.2%;

[0033] (4) External oiling and drying: add edible acidified oil from the alkali-refined crude bran oil treated in step 3), and increase the pressure to 0.2...

Embodiment 2

[0041] A method for extracting rice bran oil from rice bran, comprising the following steps:

[0042] (1) Rice bran pretreatment: add 0.7% sodium sorbate to the rice bran, add water 8 times, stir evenly, and then pass through a 130-mesh sieve;

[0043] (2) Extraction of crude bran oil: The rice bran water mixture pretreated in step 1) is expanded with isopropanol and soaked in oil. The extraction temperature during the extraction process is 65°C for 4 hours to obtain crude bran oil. ;

[0044] (3) Alkali refining of crude bran oil: Use 20% sodium hydroxide to alkali refine the crude bran oil at a temperature of 60°C, and the amount of crude bran oil exceeding sodium hydroxide is 0.2%;

[0045] (4) External oiling and drying: Add edible acidified oil from the alkali-refined crude bran oil treated in step 3), and increase the pressure to 0.9MPa, wash with normal temperature water for 2 hours, keep the pressure constant, turn to Put it into a dryer for drying treatment at a vac...

Embodiment 3

[0053] A method for extracting rice bran oil from rice bran, comprising the following steps:

[0054] (1) Rice bran pretreatment: Add sorbic acid and sodium sorbate at a weight ratio of 0.65% to the rice bran, add 7 times of water, stir evenly, and then pass through a 140-mesh sieve;

[0055] (2) Extraction of crude bran oil: the rice bran water mixture pretreated in step 1) is expanded and oil-immersed with petroleum ether, and the extraction temperature during the extraction process is 40°C for 5 hours to obtain crude bran oil;

[0056] (3) Alkali refining of crude bran oil: using 20% ​​sodium hydroxide, alkali refining of crude bran oil at a temperature of 55°C, the amount of crude bran oil exceeding sodium hydroxide is 0.2%;

[0057] (4) External oiling and drying: Add edible acidified oil from the alkali-refined crude bran oil treated in step 3), and increase the pressure to 0.6MPa, wash with normal temperature water, and keep the pressure constant after washing with wate...

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Abstract

The invention relates to the technical field of extraction of vegetable oil from a plant, and particularly relates to a method for extracting rice bran oil from rice bran. The method comprises the following steps: rice bran pretreatment, crude bran oil extraction, crude bran oil alkali refining, added oil drying, decolorizing, deodorization, deacidification, dewaxing, degumming, fractionation and degreasing, wherein the acid value of the prepared product rice bran oil is maintained at 0.1-1.0mg / g, the acid value of the rice bran oil is further reduced, and the quality of the rice bran oil is improved. The method is simple in process, and the rice bran is comprehensively utilized when the rice bran oil is extracted, so that not only is the rice bran applied to a stock feed, but also the rice bran oil is extracted from the rice bran, meanwhile, feed nutrition oil is obtained, the nutrient value of the rice bran as the feed is improved, the additional value of the rice bran is increased, and the production cost of the rice bran oil is reduced.

Description

technical field [0001] The invention relates to the technical field of extracting vegetable oil from plants, in particular to a method for extracting rice bran oil from rice bran. Background technique [0002] Rice bran oil is a nutrient-rich vegetable oil. It is another healthy food oil produced after sunflower oil and corn germ oil. Long-term consumption of rice bran oil has the functions of preventing cardiovascular and cerebrovascular diseases, promoting metabolism and anti-aging; At the same time, rice bran oil also contains a large amount of unsaturated fatty acids, that is, more than 80%, and the density of rice bran oil is relatively high, maintaining at 0.9<density<1g / cm 3 . As far as my country's current situation is concerned, the annual production of rice bran is very large. Because rice bran is prone to rancidity and deterioration, and domestic production enterprises are scattered and the production scale is small, it is difficult to concentrate rice bran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/10C11B3/00A23D9/02
Inventor 翟洪平石承义刘荣贵
Owner 贵州侗乡生态农业科技发展有限公司