Method for preparing radish red pigment homopolymer and radish proanthocyanidin from red-core radishes

Abstract

The invention relates to a method for preparing radish red pigment homopolymer and radish proanthocyanidin from red-core radishes, belonging to the technical field of preparation of natural red pigments and proanthocyanidin. The method comprises the following steps: by using red-core radishes as the raw material, extracting, removing proteins, removing glucoraphanin, purifying by ultrafiltration,concentrating, and carrying out spray drying to obtain the radish red pigment homopolymer and radish proanthocyanidin products. The invention has the advantages of great convenience, simple technique, wide raw material sources, and cheap and accessible raw materials; all the materials in the production process can be recycled, so that the material resources are fully utilized and no waste is discharged, and thus, the invention also has the advantages of energy saving and low production cost; and the products have the advantages of high purity, no peculiar smell of radishes, favorable solubility and the like. The invention can be widely used for preparing radish red pigment homopolymer and radish proanthocyanidin from red-core radishes. The products prepared by the method provided by the invention can be widely used in the industries of food, medicines, health products, cosmetics, dyes and the like.

Description

Method for preparing radish red pigment monomer and radish proanthocyanidin from red radish 1. Technical field The invention belongs to the technical field of preparation of natural red pigment and proanthocyanidin, and in particular relates to a method for preparing radish red pigment monomer and radish proanthocyanidin from red radish. 2. Background technology Radish red pigment is a natural pigment mainly composed of tianzhu pigment. It is safe, non-toxic, rich in resources, and has certain nutritional and pharmacological effects. And it is widely used in industries such as food coloring, medicine, cosmetics and health care products. Proanthocyanidin is a bioflavonoid with a special molecular structure, mostly reddish-brown powder. It is currently recognized as the most effective natural antioxidant for removing free radicals in the human body. It has the functions of protecting cardiovascular, preventing high blood pressure, anti-tumor, and anti-radiation. Function, ...

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: ① only one product of radish red pigment can be prepared

② The radish red pigment monomer and radish proanthocyanidin in the radish red pigment are not separated, and the prepared radish red pigment product can only be dissolved and applied in a solution with high alcohol content

③ The method has many steps and complicated process, and the residue of extracting radish red pigment and the waste liquid produced in the preparation process are not comprehensively utilized or harmlessly treated, the utilization rate of raw materials is low, and environmental pollution is caused

The main disadvantages of this method are: ① only one product of proanthocyanidins can be prepared

② It is difficult to remove small molecules or macromolecular impurities in the extract by only precipitation or nanofiltration process, and the product quality is poor

Therefore, the product obtained by this method has low antioxidant capacity

④ This method does not carry out comprehensive utilization or harmless treatment of residues and waste liquids produced in the process of preparing and separating proanthocyanidins, which neither fully utilizes resources nor pollutes the environment, which is not conducive to environmental protection