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A process for simultaneously producing soybean protein isolate and soybean protein concentrate

A technology of concentrated soybean protein and isolated soybean protein, which is applied in plant protein processing, protein composition of vegetable seeds, protein food ingredients, etc., can solve the problems of large amount of sewage, difficult treatment, low NSI index of soybean protein concentrate, etc. Achieve the effect of increasing concentration and facilitating recovery

Active Publication Date: 2020-12-15
LINYI YUWANG VEGETABLE PROTEIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, it can be seen that the production of soybean protein isolate by alkali-soluble acid precipitation method and the production of soybean protein concentrate by pickling method can reach a higher NSI index. However, the production process needs to use a lot of water, resulting in a large amount of sewage and difficult treatment; The NSI index of soybean protein concentrate produced by washing method is very low

Method used

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  • A process for simultaneously producing soybean protein isolate and soybean protein concentrate
  • A process for simultaneously producing soybean protein isolate and soybean protein concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A process for simultaneously producing soybean protein isolate and soybean protein concentrate, comprising the steps of:

[0063] a) Extraction: mix the raw material low-temperature defatted soybean meal with water in a ratio of 1:8 by weight, adjust the pH value to 6.8-7.0, stir, and circulate for homogenization;

[0064] b) Centrifugal separation: centrifuge the extract in step a) to obtain solid phase 1 and liquid phase 1, and obtain solid phase 2 and liquid phase 2 after the solid phase is washed with water;

[0065] c) Acid precipitation: adjust the pH value of the liquid phase 3 of the mixture of liquid phases 1 and 2 to 4.6-4.8 for sedimentation;

[0066] d) centrifugation: centrifuging the acid precipitation solution in step c) to obtain solid phase 3 and liquid phase 4;

[0067] e) Neutralization: Stir the solid phase 3 with 3 times the weight of water, adjust the pH to 6.5-7.0, and obtain the liquid phase 5;

[0068] f) Sterilization: The liquid phase 5 is s...

Embodiment 2

[0079] A process for simultaneously producing soybean protein isolate and soybean protein concentrate, comprising the steps of:

[0080] a) Extraction: mix the raw material low-temperature defatted soybean meal with water at a ratio of 1:10 by weight, adjust the pH value to 7.2-7.4, stir, and circulate for homogenization;

[0081] b) Centrifugal separation: centrifuge the extract in step a) to obtain solid phase 1 and liquid phase 1, and obtain solid phase 2 and liquid phase 2 after the solid phase is washed with water;

[0082] c) Acid precipitation: adjust the pH value of the liquid phase 3 of the mixture of liquid phases 1 and 2 to 4.5-4.6 for sedimentation;

[0083] d) centrifugation: centrifuging the acid precipitation solution in step c) to obtain solid phase 3 and liquid phase 4;

[0084] e) Neutralization: Stir the solid phase 3 with 3-5 times the weight of water, adjust the pH to 6.7-7.0, and obtain the liquid phase 5;

[0085] f) Sterilization: The liquid phase 5 i...

Embodiment 3

[0096] A process for simultaneously producing soybean protein isolate and soybean protein concentrate, comprising the steps of:

[0097] a) Extraction: mix the raw material low-temperature defatted soybean meal with water at a ratio of 1:9 by weight, adjust the pH value to 7.4-7.8, stir, and circulate for homogenization;

[0098] b) Centrifugal separation: centrifuge the extract in step a) to obtain solid phase 1 and liquid phase 1, and obtain solid phase 2 and liquid phase 2 after the solid phase is washed with water;

[0099] c) Acid precipitation: adjust the pH value of the liquid phase 3 of the mixture of liquid phases 1 and 2 to 4.5-4.6 for sedimentation;

[0100] d) centrifugation: centrifuging the acid precipitation solution in step c) to obtain solid phase 3 and liquid phase 4;

[0101] e) Neutralization: Stir the solid phase 3 with 3-5 times the weight of water, adjust the pH to 7.3-7.5, and obtain the liquid phase 5;

[0102] f) Sterilization: The liquid phase 5 is...

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Abstract

The present invention discloses a technology of simultaneously producing soybean protein isolate and soybean protein concentrate. The technology comprises the following steps: a raw material low-temperature defatted soybean meal and water are mixed, a pH value of the mixture is adjusted to be 6.5-8.0, a circulated homogenization is conducted, and the homogenized mixture is separated to obtain a solid phase 1 and a liquid phase 1; a pH value of the liquid phase 1 is adjusted to be 4.5-4.8 and the liquid phase 1 precipitates and is separated to obtain a solid phase 3 and a liquid phase 4; the solid phase 3 and water are mixed, a pH value of the mixture is adjusted to be 6.5-7.5, the mixture is sterilized and the sterilized mixture is dried to obtain the soybean protein isolate; the liquid phase 4 is recycled to obtain a liquid phase 6; the raw material low-temperature defatted soybean meal is mixed with the liquid phase 6, a pH value of the mixture is adjusted to be 4.5-4.8, the circulated homogenization is conducted, and the homogenized mixture is separated to obtain the solid phase 4 and a liquid phase 7; the solid phase 4 and water are mixed and the mixture is separated to obtain a solid phase 5; and the solid phase 5 is mixed with water, a pH value of the mixture is adjusted to be 6.5-7.5 and the mixture is dried to obtain the soybean protein concentrate. Acid cleaning wastewater generated from a production of the soybean protein isolate is recycled and utilized to conduct a production of the soybean protein concentrate, so that water use amounts of the soybean protein isolate and soybean protein concentrate are reduced about 45-55%.

Description

technical field [0001] The invention relates to a production process of edible protein, in particular to a process for simultaneously producing soybean protein isolate and soybean protein concentrate. Background technique [0002] Soybean protein is currently the only reported cholesterol-free plant protein that contains 9 essential amino acids needed by the human body and meets the needs of the human body. It is recognized as a complete protein that can supplement the animal protein and grain protein diets Defects. However, the soy protein intake of Chinese residents is relatively small, especially the intake of soy protein is only 5%, which is far below the recommended 20%. On the basis of affirming the nutritional function of soybean protein, researchers have never given up on the research on the health function of soybean protein for a long time. A large number of experiments have proved that soybean protein has the functions of lowering blood fat and cholesterol, impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23J1/14A23J3/16
CPCA23J1/14A23J3/16
Inventor 刘汝萃王彩华时玉强崔玉涛
Owner LINYI YUWANG VEGETABLE PROTEIN