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Refining process for rice bran oil

A technology of rice bran oil and rice bran crude oil, which is applied in the fields of fat oil/fat refining, fat oil/fat production, fat production, etc. It can solve the problems of inability to process high-acid oil, increase production cost, reduce oil yield, etc., and achieve physiological protection Effects of active substances, improving yield, and reducing vaporization time

Inactive Publication Date: 2016-08-17
GAOAN QINGHE GREASE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while neutralizing free fatty acids, some neutral oils are also neutralized by NaOH, which reduces the yield of oil
However, when comprehensively utilizing soapstock, it is necessary to add 98% concentrated sulfuric acid to reduce it into fatty acid (commonly known as acidified oil), so the production cost is increased.
In addition, existing technologies cannot process high-acid oils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of rice bran oil refining process, concrete steps are as follows:

[0021] (1) Pretreatment of fresh rice bran, including screening and wet expansion of rice bran, so that the crushing degree of rice bran after wet expansion treatment is 40 mesh and the water content is 6%;

[0022] (2) Add leaching solvent isopropanol and papain to the rice bran after wet puffing, wherein the weight ratio of isopropanol to rice bran is 1:1, and the mass of papain is 0.1% of rice bran, then add rice bran, Isopropanol and water with 7 times the total weight of papain are leached to obtain mixed crude rice bran oil. The temperature of the leaching process is 50°C, the time is 6 hours, and the pH value is 6.4; the content of impurities in the crude rice bran oil is not higher than 0.15%;

[0023] (3) Add water at 45°C and phosphoric acid with a concentration of 85% under the action of stirring, wherein the amount of phosphoric acid is 0.15% of the oil weight, and the amount of hot w...

Embodiment 2

[0029] A kind of rice bran oil refining process, concrete steps are as follows:

[0030] (1) Pretreatment of fresh rice bran, including rice bran screening and wet expansion, so that the wet expanded rice bran has a crushing degree of 45 mesh and a water content of 6.5%;

[0031] (2) Add leaching solvent isopropanol and papain to the rice bran after wet puffing, wherein the weight ratio of isopropanol to rice bran is 1.1:1, and the mass of papain is 0.11% of rice bran, then add rice bran, Isopropanol and water with 7.5 times the total weight of papain are leached to obtain mixed crude rice bran oil. The temperature of the leaching process is 52°C, the time is 7 hours, and the pH value is 6.45; the content of impurities in the crude rice bran oil is not higher than 0.15%;

[0032] (3) Add water at 48°C and phosphoric acid with a concentration of 85% under the action of stirring, wherein the amount of phosphoric acid is 0.18% of the oil weight, and the amount of hot water is 2.2...

Embodiment 3

[0038] A kind of rice bran oil refining process, concrete steps are as follows:

[0039] (1) Pretreatment of fresh rice bran, including screening of rice bran and wet expansion, so that the degree of crushing of rice bran after wet expansion treatment is 50 mesh, and the water content is 7%;

[0040](2) Add leaching solvent isopropanol and papain to the rice bran after wet puffing, wherein the weight ratio of isopropanol to rice bran is 1.2:1, and the mass of papain is 0.12% of rice bran, then add rice bran, Isopropanol and water with 8 times the total weight of papain are leached to obtain mixed crude rice bran oil. The temperature of the leaching process is 55°C, the time is 8 hours, and the pH value is 6.5; the content of impurities in the crude rice bran oil is not higher than 0.15%;

[0041] (3) Add water at 50°C and 85% phosphoric acid to rice bran crude oil under stirring, wherein the amount of phosphoric acid is 0.2% of the oil weight, and the amount of hot water is 2....

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PUM

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Abstract

The invention discloses a refining process for rice bran oil. The refining process includes the concrete steps of pretreatment, rice bran crude oil extraction, degumming, decoloration, deacidification, deodorization and dewaxing. In deacidification, alkali liquor with the mass concentration of 10-15% is added into the rice bran oil, and then the oil is introduced into a first packed tower and treated for 40-60 min at the temperature of 80-120 DEG C; then, the oil is introduced into a second packed tower and subjected to steam distillation deacidification at the temperature of 150-200 DEG C and the pressure of 100 Pa. The refining process is low in production energy consumption, high in oil yield and good in decoloration effect; in degumming, only 1 h is needed by adopting a centrifugal separation method, process time is shortened, and the finished product yield is increased; through steam distillation deacidification, vaporization time of low-boiling-point components such as fatty acid is shortened, steam consumption in steam stripping is lowered, physiologically-active substances in the rice bran oil are effectively protected, the retention rate of oryzanol can reach 90%, and the refining rate is also greatly increased.

Description

technical field [0001] The invention relates to the technical field of oil processing, in particular to a rice bran oil refining process. Background technique [0002] Rice bran not only has a high content of essential fatty acids and proteins, but also contains other anti-cancer and health-promoting functional substances, such as dietary fiber, vitamins, oryzanol, minerals, etc. It is a high additional resource with great development potential. [0003] Rice bran oil is a deep-processed product of rice bran. Its fatty acid composition is relatively reasonable, containing 38% linoleic acid and 42% oleic acid. It meets the best ratio of oleic acid and linoleic acid recommended by the International Health Organization. It is an internationally recognized nutritional oil. . In addition, rice bran oil is also rich in vitamin E, oryzanol, sitosterol and other phytosterols, which has high nutritional and health value. Eating rice bran oil has a good therapeutic effect on lowering...

Claims

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Application Information

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IPC IPC(8): C11B1/04C11B1/02C11B1/10C11B3/00C11B3/06C11B3/10C11B3/16
CPCC11B1/04C11B1/02C11B1/025C11B1/10C11B3/001C11B3/008C11B3/06C11B3/10C11B3/16
Inventor 章立平
Owner GAOAN QINGHE GREASE CO LTD
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