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Production method for extracting crude rice oil by enzyme method

A technology of enzymatic extraction and production method, which is applied in the direction of fat oil/fat production, fat production, fat oil/fat refining, etc. It can solve the problems of high price of enzyme substances, large output of three wastes, limited application, etc., and solve the loss of nutrients Effect

Pending Publication Date: 2021-09-21
SHANDONG SANXING CORN IND SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction method has the following problems: the output of the three wastes is large, and the pigment and other substances will be extracted with the oil during the extraction process, resulting in too many impurities in the crude oil, and the subsequent refining is complicated
However, due to the relatively high price of the enzyme substance, its application in the industrial production of rice oil is limited.

Method used

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  • Production method for extracting crude rice oil by enzyme method
  • Production method for extracting crude rice oil by enzyme method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] A production method for enzymatically extracting crude oil from rice oil, the specific method is as follows:

[0019] (1) Rice bran screening: pick out impurities such as stones and broken rice in the rice bran.

[0020] (2) Rice bran sieving: the rice bran is passed through a 40-mesh sieve.

[0021] (3) Soaking: Take 100 g of sieved rice bran, add it to 200 ml of water and soak for 1 hour.

[0022] (4) Wall breaking: filter the water in the rice bran soaked in step (3), add 100 ml of hydrogen peroxide solution with a concentration of 1% to the filter cake, and stir at 15° C. for 8 hours.

[0023] (5) Enzymolysis: the slurry after the wall breaking in the detection step (4), the starch potassium iodide test paper does not change color, and there is no residual hydrogen peroxide in the slurry. At this time, the pH of the slurry is 6-7. Use acetic acid to adjust the pH of the slurry to 5-6, then heat up to 30-40° C., add 0.5 g of a compound enzyme agent with a ratio of ...

Embodiment 2

[0027] A production method for enzymatically extracting crude oil from rice oil, the specific method is as follows:

[0028] (1) Rice bran screening: pick out impurities such as stones and broken rice in the rice bran.

[0029] (2) Rice bran sieving: the rice bran is passed through a 40-mesh sieve.

[0030] (3) Soaking: Take 100 g of sieved rice bran, add it to 200 ml of water and soak for 1 hour.

[0031] (4) Wall breaking: filter the water in the rice bran soaked in step (3), add 100 ml of 2% hydrogen peroxide solution to the filter cake, and stir at 15° C. for 10 h.

[0032] (5) Enzymolysis: the slurry after the wall breaking in the detection step (4), the starch potassium iodide test paper does not change color, and there is no residual hydrogen peroxide in the slurry. At this time, the pH of the slurry is 5-6, and then the temperature is raised to 30-40°C, and 0.8 g of a compound enzyme agent with a ratio of 1:1 of cellulase and protease is added, and stirred for 1 hour...

Embodiment 3

[0036] A production method for enzymatically extracting crude oil from rice oil, the specific method is as follows:

[0037] (1) Rice bran screening: pick out impurities such as stones and broken rice in the rice bran.

[0038] (2) Rice bran sieving: the rice bran is passed through a 40-mesh sieve.

[0039] (3) Soaking: Take 100 g of sieved rice bran, add it to 200 ml of water and soak for 1 hour.

[0040] (4) Wall breaking: filter the water in the rice bran soaked in step (3), add 100 ml of 3% hydrogen peroxide solution to the filter cake, and stir at 15° C. for 12 hours.

[0041] (5) Enzymolysis: the slurry after the wall breaking in the detection step (4), the starch potassium iodide test paper does not change color, and there is no residual hydrogen peroxide in the slurry. At this time, the pH of the slurry is 4, adding sodium hydroxide to adjust the pH of the slurry to 5-6, then warming up to 30-40°C, adding 0.6g of a compound enzyme agent with a ratio of cellulase and ...

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Abstract

The invention relates to a production method for extracting crude rice oil through an enzyme method, and belongs to the technical field of oil extraction. The production method comprises the following steps: (1) screening rice bran; (2) sieving the rice bran; (3) soaking; (4) carrying out wall breaking; (5) carrying out enzymolysis; (6) carrying out solid-liquid separation; and (7) carrying out demulsification separation. According to the method, the rice bran is subjected to primary wall breaking and enzyme deactivation treatment by adopting the low-concentration hydrogen peroxide, so that the problem of loss of unstable nutrient substances in the rice bran during high-temperature treatment in the original process is solved, and meanwhile, the sufficient proceeding of the subsequent enzymolysis process is also ensured. The cellulose of the rice bran is destroyed in advance in the early stage, so that the dosage of an enzyme agent is reduced during enzymolysis. The oil yield of the finally obtained crude oil is greater than 90%, almost no three wastes are generated in the production process, and the method belongs to a green and environment-friendly production process.

Description

technical field [0001] The invention belongs to the technical field of oil extraction, and in particular relates to a production method for enzymatically extracting crude rice oil. Background technique [0002] Paddy generally consists of 20% chaff, 9% bran, 70% rice grain and 1% germ. The rice we eat is what remains after the husk, bran and germ are removed from the paddy grain. The rice bran we often refer to refers to the mixture of bran and germ. Rice bran contains a large number of nutritional compounds, such as fiber, fat, protein, vitamins (vitamin E and vitamin B complex) and antioxidant molecules. Rice bran also contains 10-23% rice oil (also known as rice bran oil). The fatty acid content of rice oil is balanced, consisting of 47% monounsaturated fatty acids, 33% polyunsaturated fatty acids and 20% saturated fatty acids. The main unsaturated fatty acids are oleic acid, linoleic acid and linolenic acid, and the main saturated fatty acids are palmitic acid, myrist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/02C11B3/16C11B3/02
CPCC11B1/04C11B1/025C11B3/16C11B3/02
Inventor 王月华成良玉程芳园王秀华毕小兰
Owner SHANDONG SANXING CORN IND SCI CO LTD
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