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Method for extracting rice protein from rice

A rice protein and rice technology, which is applied in the processing of plant protein, etc., can solve the problems of reduced nutritional value, denaturation of rice protein, cumbersome process, etc., and achieve the effects of avoiding protein loss, low degree of protein denaturation, and simple process operation

Inactive Publication Date: 2004-09-15
GAEA GEM RICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses rice grains as raw material, but high-temperature liquefying enzyme needs to be added from rice to rice grains, and the reaction temperature is as high as 120-130°C, which may easily cause serious denaturation of rice protein, resulting in reduced nutritional value and affecting human body absorption. At the same time, this process requires Longer time and more cumbersome process
According to this method, to obtain rice protein concentrate and rice protein isolate, it must be extracted by alkaline method, that is to say, a large amount of chemical preparations such as acid and alkali must be added, and some countries clearly limit rice protein products and cannot be extracted by chemical preparations; at the same time Chemical preparations such as acid and alkali also pollute the rice protein itself and the environment; using this process requires a large amount of acid, alkali and water, which also increases the extraction cost, and at the same time makes the operation cumbersome and the extraction time is correspondingly longer
[0010] At present, there is no relevant report on the industrial production method of rice protein concentrate and rice protein isolate without applying alkali extraction method at home and abroad.

Method used

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  • Method for extracting rice protein from rice
  • Method for extracting rice protein from rice

Examples

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Effect test

Embodiment 1

[0052] Take by weighing 200kg of early indica rice, put into the cleaning tank, soak for 2 hours after cleaning; send into the cyclone desander, the cone angle of the cyclone desander is 45°, the pressure is 0.1Mpa, the desander is 25mm, two-stage desandering; Put into a refiner to refine to a fineness of more than 80 meshes, and keep the slurry concentration at about 10%; input the slurry into a colloid mill for fine grinding twice, with a pore size of 0.1mm, and take 10 minutes; input the slurry into a disc separator for three-stage separation (separation The starch slurry at the bottom outlet outlet is concentrated and then sent to the ebullating bed for drying to obtain rice starch, the following examples are the same); in the three-stage separation, the protein slurry at the top overflow port is collected and combined, then press-filtered, and the filter residue is sent to the ebullating bed for drying , control the temperature of the material below 80°C to obtain concentr...

Embodiment 2

[0054] Take 200kg of early indica rice, put it into a cleaning tank, soak for 2.5 hours after cleaning; send it into the cyclone desander, the cone angle of the cyclone desander is 45 °, the pressure is 0.1Mpa, the desander is 25mm, two-stage desandering; Put into a refiner to refine to a fineness of more than 80 mesh, and maintain a slurry concentration of about 10%; input the slurry into a colloid mill for fine grinding twice, with a pore size of 0.08mm, and take 12 minutes; input the slurry into a disc separator for three-stage separation; a part In the three-stage separation, the protein slurry at the top overflow port is collected and combined, and then press-filtered; the filter residue is sent to the ebullating bed for drying, and the temperature of the material is controlled below 80°C to obtain concentrated rice protein. Another part of the tertiary separation, the top overflow port protein slurry is collected and combined, enters the enzymolysis tank, and the followin...

Embodiment 3

[0056] Take by weighing 200kg of early indica rice, put into cleaning tank, soak for 3 hours after cleaning; send into cyclone desander, the cone angle of the cyclone desander is 45°, the pressure is 0.1Mpa, the desander is 25mm, two-stage desandering; Put into a refiner to refine to more than 80 mesh, and keep the slurry concentration at about 10%; input the slurry into the colloid mill for fine grinding twice, with a pore size of 0.05mm, and take 15 minutes; input the slurry into the disc separator for tertiary separation; during the tertiary separation After the protein slurry at the top overflow port is collected and combined, it enters the enzymatic hydrolysis tank, and the following enzyme solutions are added in turn for reaction: α-amylase: 30g enzyme amount, reaction time 65°C, pH=6.0, reaction time 1 hour; cellulose Enzyme: 30g of enzyme added; reaction time 45°C, PH = 4.5, reaction time 3 hours; lipase: 50g enzyme amount, reaction time 50°C, PH = 7.0, reaction for 3 h...

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Abstract

The present invention discloses a method for extracting rice protein from rice. Said method includes the following steps: cleaning rice, soaking, removing sand, grinding to make pulp, concentrating and drying rice protein; also includes the steps of fine-grinding rice pulp, adopting dished separating machine to make multistage separation and making the protein pulp undergo the process of enzyme treatment. The described enzyme treatment is characterized by that in the multistage separated and combined rice protein pulp the following enzymes are successively added to make reaction: adding 0.05%-0.2% of amylase, temp. is 60-70 deg.C and time is 40-60 min; adding 0.05%-0.2% of cellulase, temp. is 40-50 deg.C and time is 2-3 hr; and adding 0.1%-1% of lipase, temp. is 40-60 deg.C and time is 2-3 hr. Said method can implement industrial production of rice protein.

Description

technical field [0001] The invention relates to a method of extracting rice protein from rice (including rice protein concentrate and rice protein isolate, rice protein concentrate refers to rice protein with a purity of 75%-89%, and rice protein isolate refers to rice protein with a purity of more than 90%. same) method. Background technique [0002] The latest research shows that compared with soybean protein in animal protein and plant protein, rice protein has hypoallergenicity that other proteins do not have, and is more suitable for human body, especially infants. In addition, rice protein has excellent nutritional value, its amino acid ratio is relatively reasonable, close to complete protein, and its biological value (BV) and protein value (PV) are also higher than other vegetable proteins, making it the top grade among vegetable proteins. Therefore, there is a great demand for rice protein at home and abroad, and my country regards the extraction of rice protein as...

Claims

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Application Information

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IPC IPC(8): A23J3/14
Inventor 孙庆杰陈小延杨明毅何新益易翠平田正文张兴泉王红丽
Owner GAEA GEM RICE
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