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Method for extracting soybean isoflavone from soybean whey liquid

A technology for soybean isoflavones and soybean whey is applied in the field of extracting soybean isoflavones from soybean whey liquid, and can solve the problems of complexity, high cost, large amount of solvent and the like

Inactive Publication Date: 2006-04-26
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the salinity of whey is generally lower than 10%, the cost of electrodialysis desalination is relatively high; and the use of macroporous resin adsorption must also have intermittent operation, large amount of solvent, possible residue, and complicated industrial implementation. aspects of the problem

Method used

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  • Method for extracting soybean isoflavone from soybean whey liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1): Pretreatment of soybean whey liquid

[0023] a) Soybean whey comes directly from the soybean protein isolate production line, in which the content of soy isoflavones is 0.11mg / mL, it is sterilized by heating at 105°C, and the pH value of the whey is kept at 4.5, and then enters the liquid storage tank and stands still Precipitate for more than 60min;

[0024] b) The above-mentioned whey liquid is filtered with a microfilter, the concentrated solution A1 is returned to the liquid storage tank, and the permeate A2 enters the ultrafilter:

[0025] c) The microfiltration permeate A2 is filtered by an air flushing enhanced dynamic ultrafilter, the concentrated solution B1 is returned to the liquid storage tank, and the permeate B2 enters the nanofiltration device;

[0026] Step 2): Concentration and desalting of soybean whey by nanofiltration

[0027] Adjust the pH value of the ultrafiltration permeate B2 to 7.0, take 20L of the ultrafiltration permeate, inject it...

Embodiment 2

[0035] Step 1): Pre-processing

[0036] ①Soybean whey comes directly from the soybean protein isolate production line, in which the content of soy isoflavones is 0.126mg / mL, it is sterilized by heating at 115°C, and the pH value of the whey is adjusted to 7.0, and then enters the liquid storage tank and stands still Precipitate for more than 60min;

[0037] ②Use a microfilter to filter the above-mentioned whey liquid, return the concentrated liquid A1 to the liquid storage tank, and pass through the liquid A2 into the ultrafilter;

[0038] ③The microfiltration permeate A2 is filtered by an air flushing enhanced dynamic ultrafilter, the concentrated solution B1 is returned to the liquid storage tank, and the permeate B2 enters the nanofiltration device;

[0039] Step 2): Nanofiltration concentration and desalination

[0040] Take 30L of the ultrafiltration permeate B2, concentrate it to 2L by nanofiltration under the pressure of 1.2MPa, then add pure water to 20L, repeat the ...

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Abstract

The present invention relates to the method of extracting soybean isoflavone from soybean whey liquid as one side product of soybean protein producing process. The method includes first air blast reinforced dynamic ultrafiltering of soybean whey liquid to separate protein, the subsequent nanofiltering to concentrate whey liquid, desalting, extracting concentrated liquid, and final decompression distilling extracted liquid for concentrating to obtain soybean isoflavone product of purity over 40 %. The method has membrane technology and extraction technology adopted, has simple operation and high economic utility and is suitable for industrial production.

Description

【Technical field】 [0001] The invention relates to the technical field of soybean deep processing and waste water resource utilization, in particular to a method for extracting soybean isoflavones from soybean whey liquid. 【Background technique】 [0002] Soybean isoflavones are secondary metabolites formed during the growth of soybeans. They are the main physiologically active substances in soybeans. They have weak estrogen properties and antioxidant activity, and are a natural anticancer compound. They are effective for women with breast cancer, Menopausal syndrome, middle-aged and elderly women's osteoporosis and other diseases have significant curative effects, and have good health care effects in preventing and treating cancer, osteoporosis, and cardiovascular diseases. At present, it is widely used in the production of health food and medicine, and is in great demand. [0003] Isoflavone resources in nature are very limited, and soybean is the only food resource that co...

Claims

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Application Information

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IPC IPC(8): C07D311/40C07D311/36
Inventor 吕斯濠武嘉李旭宁孙海峰陈福明
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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