Extraction of soya isoflavone, concentrated soya protein and soya oligose

Abstract

Process for extracting soy isoflavone, soy concentrated protein and soy oligosaccharide is carried out by: 1) breaking bean oil cake, supersonic circulating extracting and centrifugal filtering with material ratio 1:10 of broken bean oil cake powder and solvent, and obtaining extract and bean oil cake slag; 2) concentrating the extract and recovering solvent, adding pankrin into concentrate, and obtaining purified liquid and protein milk curd by centrifugal and natural method; 3) passing the purified liquid through macro-porous adsorptive resin bed, and obtaining water eluent and alcohol eluent; 4) concentrating alcohol eluent and recovering alcohol, spraying and drying concentrate, and obtaining soy isoflavone; 5) mixing bean oil cake slag with protein milk curd, drying, breaking, and obtaining soy concentrated protein; 6) de-coloring water eluent, filtering, concentrating, and obtaining soy oligosaccharide; 7) recovering process assistant, regenerating or purifying circulating utilizing. It achieves no waste discharge and resource utilization.

Description

technical field [0001] The invention belongs to the field of soybean deep processing, and in particular relates to a process for extracting soybean isoflavones, soybean concentrated protein and soybean oligosaccharides, which can rationally utilize the by-products and has no waste discharge. Background technique [0002] Soy isoflavones, soybean protein, and soybean oligosaccharides are important components in soybeans. [0003] Soybean isoflavones are the main biologically active substances contained in soybeans. Soybean isoflavones are secondary metabolites in soybean growth and exist in hypocotyls and cotyledons. There are currently 12 known soy isoflavones, including 3 free-type aglycones and 9 bound-type glycosides. Soybean isoflavones can be transformed into hormone-like compounds by intestinal bacteria, have estrogen and antioxidant activity, and can effectively block angiogenesis and cut off nutrient sources in the breeding of malignant tumors, thereby delaying or p...

AI Technical Summary

Problems solved by technology

What needs to be paid more attention to is that in all techniques for separating soybean isoflavones using the macroporous adsorption resin method, there is also the following common defect: the acid and alkali waste water produced by resin regeneration (produce about 3 to 4 times the amount of raw materials each time) Waste water) is not purified, which will cause environmental pollution and increase environmental protection costs; washing and impurity removal eluent (organic waste liquid) is not purified, which will also cause environmental pollution

In summary, these processes do not meet the requirements of green environmental protection processes and recycling of water resources.