Patent ID: 11891411
Assignee: CHENGUANG BIOTECH GROUP CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC A  C | IPC C

Claim 0:
1. An industrial utilization method for extracting Stevia rebaudiana, comprising:
1) Extracting Stevia rebaudiana powder with a high-concentration short-chain alcohol aqueous solution to obtain an extract solution, wherein the short-chain alcohol in the high-concentration short-chain alcohol aqueous solution is selected from methanol, ethanol, propanol or any combination thereof, and a volume fraction of the short-chain alcohol in the short-chain alcohol aqueous solution is 70% to 95%;
2) Removing the short-chain alcohol in the extract solution by vacuum concentration, and subjecting the extract solution to liquid-liquid extraction with an organic solvent, and taking water layer to obtain a low-polar impurity-removed extract solution, wherein the organic solvent is a low-polar organic solvent that is water insoluble; and
3) Adjusting pH of the low-polar impurity-removed extract solution to be alkaline, and passing the extract solution through a stevioside adsorption resin to obtain a stevioside extract.