Extraction process of composite nutrition components of protein, gamma-oryzanol alcohol and vitamin E in rice bran

Abstract

The invention discloses a comprehensive extraction process of composite nutrition components of protein, gamma-oryzanol alcohol and vitamin E in rice bran, and belongs to the technical field of food industry. Rice bran is praised as a natural nutrition treasury; however, more than 80% of rice bran is not developed and utilized. According to the process, the protein, the gamma-oryzanol alcohol and the vitamin E in the rice bran are extracted by using rice bran which is ground and screened and can pass through a 100-mesh sieve as a raw material, using milk which is diluted for 2-10 times by water as an extraction solvent and utilizing a hydrophilic component, namely, the protein, lipophilic small molecule fat and the like in the milk according to the similarity and dissolution principle. The process is simple, high in traction rate and low in cost; and the extract obtained in the mode contains rich animal and vegetable protein and various hydrophilic and lipotropy nutrition ingredients, thereby being a novel beverage with comprehensive nutrition. The process develops a new way for comprehensive utilization of the nutrition ingredients in the rice bran, greatly improves the additional values of the rice bran, and has significance on comprehensive utilization of the rice bran and environment protection.

Description

technical field [0001] The invention belongs to the technical field of food industry and relates to an extraction process of protein, gamma-oryzanols and vitamin E (Vitamin E) compound nutrients in rice bran. Background technique [0002] Rice bran is a by-product when brown rice is refined, including the epidermis and germ of brown rice, accounting for 6% to 8% of the total weight of rice. Studies have proved that rice bran contains high-quality and rich nutrients such as protein, fat, vitamins, γ-oryzanol and other essential elements for human body, and is known as the "treasure house of natural nutrition". China's annual rice output accounts for about 35% of the world's total rice output, ranking first in the world, with an annual output of about 10 million tons of rice bran, but only 10% to 15% of rice bran is used for deep processing such as oil extraction, most of which have not been fully developed. With the development of science and technology and the improvement o...

AI Technical Summary

Problems solved by technology

Alkali-dissolving and acid-precipitation method is used to extract rice bran protein. Due to its high alkaline environment, it is easy to generate toxic substances and cause protein quality to deteriorate during the extraction process.

Although the extraction rate of rice bran protein by enzymatic extraction is relatively high, the process is more complicated and the cost is higher. At the same time, other natural product nutrients, such as γ-oryzanol and vitamin E, are also removed as impurities; The lipophilicity of vitamin alcohol and complex vitamin E, the extraction process related to these lipophilic components all use organic solvents, the disadvantages are complex process, high cost, unsafe and not conducive to environmental protection

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