Extraction method of phytic acid in rice bran

An extraction method and rice bran technology are applied in the field of phytic acid extraction from rice bran, and can solve the problems of poor color, long extraction time, and low final phytic acid extraction rate.

Inactive Publication Date: 2008-06-25
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the extraction rate of final phytic acid is low, the extrac

Method used

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  • Extraction method of phytic acid in rice bran

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Embodiment 1

[0021] Using rice bran as raw material, crush it through a 150-mesh sieve, weigh 5g of rice bran, add 0.1mol / L hydrochloric acid solution, and control the ratio of solid to liquid to 1:5, 1:6, 1:7, 1:8, 1:9 , 1:10, control the pH to 3.0, leaching for 3 hours, and microwave the sample under the condition of medium heat (about 1000W) for 3 minutes. Then use 1mol / L sodium hydroxide solution to adjust the pH range to 3.0, and then stand and stir for 3h. Filtrate to obtain a beige suspension liquid, first adjust the pH to 4.0 with 10% calcium hydroxide emulsion, and then use 1mol / L sodium hydroxide solution to adjust the pH>7.0 to obtain a beige turbidity with white precipitates. After stirring evenly, let it stand for 2 hours to make the precipitation complete. After filtering, a gray to yellow-brown intermediate calcium phytate slurry was obtained. Calculate the amount and purity of the intermediate product calcium phytate, and see Table 1 for the effect of the solid-liquid rati...

Embodiment 2

[0025] Use rice bran as raw material to crush it through a 150-mesh sieve, weigh 5g of rice bran, add 0.1mol / L hydrochloric acid solution, control the ratio of solid to liquid to 1:7, control the pH to 3.0, extract for 3 hours, and use a power of 500W or 700W , 1000W, 1200W microwave treatment samples, time is 3min. Then use 1mol / L sodium hydroxide solution to adjust the pH range to 3.0, and then stand and stir for 3h. Filtrate to obtain a beige suspension liquid, first adjust the pH to 4.0 with 10% calcium hydroxide emulsion, and then use 1mol / L sodium hydroxide solution to adjust the pH>7.0 to obtain a beige turbidity with white precipitates. After stirring evenly, let it stand for 2 hours to make the precipitation complete. After filtering, a gray to yellowish-brown calcium phytate slurry was obtained. The amount and yield of the intermediate product calcium phytate were calculated, and the effect of microwave power on the yield of the intermediate product calcium phytate ...

Embodiment 3

[0030] Use rice bran as raw material to crush it through a 150-mesh sieve, weigh 5g of rice bran, add 0.1mol / L hydrochloric acid solution, control the ratio of solid to liquid to 1:7, control the pH to 3.0, extract for 3 hours, and use a power of 500W or 700W , 1000W, 1200W microwave treatment samples, time is 3min. Then use 1mol / L sodium hydroxide solution to adjust the pH range to 3.0, and then stand and stir for 3h. Filtrate to obtain a beige suspension liquid, first adjust the pH to 4.0 with 10% calcium hydroxide emulsion, and then use 1mol / L sodium hydroxide solution to adjust the pH>7.0 to obtain a beige turbidity with white precipitates. After stirring evenly, let it stand for 2 hours to make the precipitation complete. After filtering, a gray to yellow-brown intermediate calcium phytate slurry was obtained. Calculate the amount and yield of the intermediate product calcium phytate, and see Table 3 for the effect of microwave treatment time on the yield of the intermed...

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Abstract

The invention relates to a method for extracting the phytic acid from rice bran, in particular to an extraction method for utilizing the microwave treatment technology to obtain the phytic acid from the rice bran. The method of the invention comprises the steps that: the samples are treated using the microwave with a power ranging from 500W to 1200W after the rice bran is broken and is extracted using the hydrogen chloride solution; then the pH of the obtained solution is adjusted to range from 1.0 to 3.0 using the sodium hydroxide solution and then the processed solution is driven to rest in a static state and is stirred for 0.5 to 1 hour; the beige suspension liquid is obtained through filtration and the pH of the filtrate is first adjusted to 4.0 using the 10 per cent calcium hydroxide emulsion and then the pH of the processed solution is adjusted to exceed 7.0 using the sodium hydroxide solution with a concentration of 1mol/L instead of 10 per cent calcium hydroxide emulsion so as to obtian the beige turbid liquid in which the white precipitates are contained; the beige turbid liquid is stirred uniformly before the turbid liquid rests for 1 to 2 hours so as to completely precipitate the turbid liquid; after the turbid liquid is filtered, the intermediates, calcium phytate pulps ranging from grey to drab in color, are obtained; the intermediates are converted into the existence in the form of ions through dissolution and then the phytic acids, which are the final products, are prepared through ion exchange, decoloration and concentration. Compared with the prior art, the invention has the advantages of high extraction rate, short time, high product quality, excellent color, simple and convenient operation, suitability for the industrialized production, etc.

Description

technical field [0001] The invention relates to a method for extracting phytic acid from rice bran, in particular to a method for extracting phytic acid from rice bran by using microwave processing technology. Background technique [0002] According to the research of Japan's Mitsui East Asia Chemical Company, which has the largest industrial production of phytic acid in the world, there are currently three main production methods of phytic acid, namely: chemical synthesis, biosynthesis and solvent extraction. Among them, the solvent extraction method is the main principle of the traditional process. [0003] The content of phytic acid in rice bran is only 1% to 3%, and more exists in the form of calcium and magnesium salts, and the content can reach 10% to 15%. Therefore, the current extraction method of phytic acid is mainly the use of solvent extraction. Phytine (a general term for calcium and magnesium salts of phytate) is extracted from rice bran, and then replaced by ...

Claims

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Application Information

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IPC IPC(8): C07F9/117
Inventor 黄佩丽王化田苟文敬
Owner SHANGHAI INST OF TECH
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