Technology for efficiently extracting radix puerariae starch and radix puerariae total isoflavone

Abstract

The invention discloses a technology for efficiently extracting radix puerariae starch and radix puerariae total isoflavone, comprising the following steps: breaking, draw filing, pH value adjustment and dipping, slag slurry separation, radix puerariae starch extraction, concentration, drying and radix puerariae total isoflavone recovery in process water; applying high pressure to the mixture obtained by draw filing to passivate polyphenol oxidase; adding cellulose enzyme to degrade the cellulose to ensure starch ionization rate; further setting the dipping time after the pH value of the slagslurry mixture is adjusted so as to not only ensure the full extraction of total isoflavone but also avoid character change of the radix puerariae starch due to improper dipping time; and further recovering the radix puerariae total isoflavone by the air flotation of dissolved air in the whole process so as to ensure the extraction rate of the radix puerariae total isoflavone. The whole process flow is simple, has easily controlled condition, protects environment, efficiently extracts radix puerariae starch and radix puerariae total isoflavone and greatly improves economic benefit.

Description

technical field [0001] The invention relates to a food processing technology, in particular to a technology for efficiently extracting kudzu root starch and total isoflavones from kudzu root. Background technique [0002] Pueraria lobata is the tuberous root of Pueraria genus Fabaceae, which was first recorded in "Shen Nong's Herbal Classic" in the Han Dynasty of my country. Pueraria radix is ​​rich in starch and flavonoids (namely daidzin, puerarin, puerarin), and has high edible value and medical and health value. my country's Ministry of Health announced in 1988 that it is both edible and medicinal plants. In recent years, the planting area has developed rapidly, but the processing and utilization of Pueraria lobata is still in its infancy. Extraction, or more important than the extraction of Pueraria total isoflavones, lacks the technology that can simultaneously extract Pueraria powder and Pueraria total isoflavones, such as the Chinese patent of "Pueraria powder (Gudzu...

AI Technical Summary

Problems solved by technology

China's Ministry of Health announced in 1988 that it is both edible and medicinal plants. In recent years, the planting area has developed rapidly, but the processing and utilization of Pueraria lobata is still in its infancy. Extraction, or more important than the extraction of Pueraria total isoflavones, lacks the technology that can simultaneously extract Pueraria powder and Pueraria total isoflavones, such as the Chinese patent of "Pueraria powder (Gudzu powder) and its manufacturing process" whose application number is 93104516.9, The purpose of this process is to extract pueraria powder, and the extraction of flavonoids in pueraria is abandoned when extracting dry starch from fresh pueraria; the Chinese patent of "A New Method for Extracting High-purity Medicinal Puerarin" with application number 99115791 , the shortcoming of this new extraction method is: only the flavonoids in Puerariae root are single-extracted, promptly the extraction of Puerariae powder is abandoned when extracting the active ingredient of flavonoids from Puerariae slices, meanwhile, this method has adopted ethyl acetate and n-butyl Alcohol, methanol and other organic solvents with certain neurotoxicity, in the subsequent processing of the product, the removal of the organic solvent also increases the difficulty and complexity of the process, which brings difficulty to the increase of the added value of the product

However, the crude fiber content of the fresh pueraria root skin is high, and it contains pectin and protein. If the pueraria root is not thoroughly crushed and ground, the free rate of its starch will not be ideal. These are the efficient extraction of pueraria starch and total isoflavones of pueraria. At the same time, the activity of polyphenol oxidase in fresh kudzu root is higher, so that the phenolic substances in kudzu root are prone to browning, which affects the quality of products

[0004] The invention patent of "Separation and Comprehensive Extraction of Pueraria Root Powder and Flavonoids Using Metal Nano-membrane" with the application number of 021279661 provides a method for comprehensively extracting Pueraria root powder and total isoflavones from Pueraria root powder. Using ultrafiltration membrane technology, the separation efficiency of kudzu root powder is low, the yield is low, and it is not suitable for large-scale batch production, and this method focuses on the extraction of total isoflavones of kudzu root, ignoring the retention of the total isoflavones content of kudzu root powder. , the effective content of kudzu root powder produced jointly is not high, only similar to ordinary sweet potato starch, with low nutritional added value

[0005] The invention patent of "A Method for Extracting Starch with High Total Flavonoid Content from Pueraria Root" with application number 200410026498.5 discloses a method for extracting starch with high total flavonoid content from Pueraria Root. The color and the color are soaked in alkaline substances and then separated. The process of the invention is complicated, the yield of Pueraria starch and the extraction efficiency of flavonoids are not high, which is not conducive to industrial production, and the use of color-protecting agents not only pollutes the environment to a certain extent, but also It is also inevitable that the product will contain additives