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High-efficiency extraction method of nutritional and active substances of rice bran

A technology of active substances and extraction methods, which is applied in the field of deep processing of rice bran, can solve the problems of ignoring the purity of protein extraction and the destruction of rice bran structure, and achieve the effects of avoiding rancidity, low residual oil, and increasing added value

Active Publication Date: 2014-06-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to improve the protein extraction effect in high-temperature degreased rice bran, it is necessary to destroy the structure of rice bran. For example, ultrasonic-assisted extraction is used in patent CN200710052196.9, and complex enzyme extraction is used in patent CN200710071743.8. However, these methods all focus on the improvement of protein extraction rate and ignore Purity of protein extraction

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  • High-efficiency extraction method of nutritional and active substances of rice bran

Examples

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Effect test

Embodiment 1

[0030] Using fresh full-fat rice bran (product of Jiangxi Jinnong Biotechnology Co., Ltd.) as raw material, the extraction process steps in this example are as follows:

[0031] (1) Sieving and removing impurities: Pass 200g of fresh full-fat rice bran through a 20-mesh sieve to remove foreign matter, rice husk, broken rice and other impurities;

[0032] (2) Extraction of phytic acid by acid immersion: put the rice bran treated in step (1) in an enzyme reactor, add a hydrochloric acid solution with a concentration of 1.0wt% for immersion, the acid leaching time is 4 hours, the temperature is 50°C, and the solid-liquid ratio is 1:10, the stirring rate of the agitator is 180r / min; centrifuge at 3000r / min for 10min to obtain the residue and supernatant, add 1600mL water to wash the residue once, centrifuge again and combine the supernatant; add 100 mesh sieve to the supernatant Calcium hydroxide solution with a concentration of 10wt%, stir slowly while adding, adjust the pH value...

Embodiment 2

[0038] Using fresh full-fat rice bran (same as above) as raw material, the extraction process steps in this example are as follows:

[0039] (1) Sieving and removing impurities: Pass 200g of fresh full-fat rice bran through a 20-mesh sieve to remove foreign matter, rice husk, broken rice and other impurities;

[0040] (2) Extraction of phytic acid by acid soaking: put the rice bran treated in step (1) in an enzyme reactor, add a hydrochloric acid solution with a concentration of 1.0wt% for soaking, the acid soaking time is 3 hours, the temperature is 60°C, and the solid-liquid ratio is 1:10, the stirring rate of the agitator is 180r / min; centrifuge at 3000r / min for 10min to obtain the residue and supernatant, add 1600mL water to wash the residue once, centrifuge again and combine the supernatant; add 100 mesh sieve to the supernatant Calcium hydroxide solution with a concentration of 10wt%, stir slowly while adding, adjust the pH value to 4.6, then add a sodium hydroxide solut...

Embodiment 3

[0046] Using fresh full-fat rice bran (same as above) as raw material, the extraction process steps in this example are as follows:

[0047] (1) Sieving and removing impurities: Pass 200g of fresh full-fat rice bran through a 20-mesh sieve to remove foreign matter, rice husk, broken rice and other impurities;

[0048] (2) Extraction of phytic acid by acid soaking: put the rice bran treated in step (1) in an enzyme reactor, add a hydrochloric acid solution with a concentration of 1.4wt% for soaking, the acid soaking time is 5 hours, the temperature is 40°C, and the solid-liquid ratio is 1:8, the stirring rate of the agitator is 180r / min; centrifuge at 3000r / min for 10min to obtain the residue and supernatant, add 1600mL water to wash the residue once, centrifuge again and combine the supernatant; add 100 mesh sieve to the supernatant Calcium hydroxide solution with a concentration of 10wt%, stir slowly while adding, adjust the pH value to 5.0, then add a sodium hydroxide soluti...

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Abstract

The invention provides a high-efficiency extraction method of nutritional and active substances of rice bran. The high-efficiency extraction method comprises the following steps of 1, full-fat rice bran screening impurity-removal, 2, phytic acid extraction by immersion in an acid, 3, rice bran crude oil extraction by high-speed shearing and a complex solvent, and 4, enzyme method-based extraction of a rice bran protein. The high-efficiency extraction method can realize high-efficiency extraction of phytic acid, fat and proteins of full-fat rice bran in an order, realize high-valued complete utilization of full-fat rice bran, improve an added value and avoid resource waste.

Description

technical field [0001] The invention relates to a method for efficiently extracting nutrients and active substances (phytic acid, fat, protein) from full-fat rice bran, and belongs to the technical field of rice bran deep processing. Background technique [0002] Rice bran is one of the most important by-products in rice processing. Rice bran is not only rich in lipids (16%-22%) and crude protein (12%-16%), but also contains a variety of natural active substances, such as phytic acid, oryzanol, γ-aminobutyric acid, lipopolysaccharide, tocopherol Wait. At present, the annual output of rice bran in my country has reached 18 million tons, but the utilization rate is only 10%, most of which are used as low-value feed, causing great waste. [0003] Phytic acid is a salt in rice bran, mainly in the form of calcium-magnesium double salt (phytin). Because phytic acid has antioxidant properties and strong complexation with metal ions, it is widely used in the food industry as a st...

Claims

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Application Information

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IPC IPC(8): C07F9/117C11B1/10C12P21/06
Inventor 陈正行于秋生陈国威冯伟王韧王莉
Owner JIANGNAN UNIV
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