| 摘要 |
An extraction process for extracting a substance from a source containing the substance, for instance fruit, nuts, plants, herbs and drugs, comprises subjecting the source in the presence of an extraction liquid for the said substance, generally chosen from alcohols and water or mixtures thereof, to the influence of ultrasonic radiation, for instance with an acoustic power of 10-100 W, a frequency of 20-50 kHz and a period of 10-100 minutes, the extraction liquid serving as a transmission medium for the ultrasonic energy. Thus vanillin is obtained from line pieces and a vermouth extract is obtained from Torino herb mixture. |
