types of ultrasonic extraction equipment for Medical and Chemistry

Cavitation effect of ultrasonic vibration rod:

In some cases, the generation of ultrasonic effect is in the phase of cavitation mechanism. Acoustic cavitation refers to a series of dynamic processes, such as oscillation, expansion, contraction and even collapse, occurring in the presence of small bubbles (holes) in liquid under the action of acoustic wave. At the cavitation site, the local state of the liquid changes greatly, resulting in extreme high temperatures and pressures.

Component:

(1) ultrasonic transducer (2) ultrasonic horn (3) ultrasonic tool head (4) ultrasonic driving power supply. Its form of expression is that the transducer moves back and forth longitudinally, and its amplitude is usually several microns. Such an amplitude power density is not enough and can not be used directly. The horn amplifies the amplitude according to the design requirements, isolates the reaction solution and transducer, and also plays the role of fixing the whole ultrasonic vibration system. The tool head is connected with the horn. The horn transmits the ultrasonic energy vibration to the tool head, and then transmits the ultrasonic energy to the chemical reaction liquid by the tool head.

 

 

Application of Ultrasound Vibrating Bar in Extraction of Traditional Chinese Medicine

Ultrasound vibrating rod can be used to extract the effective components of traditional Chinese medicine. Firstly, extracting solvent is added to the container, crushing or cutting Chinese medicinal materials into granules according to the need, and putting them into the extracting solvent. Turn on the ultrasonic generator, install the ultrasonic vibrating rod on the top of the extracting tank, and send out the ultrasonic wave to the extracting solvent. The `cavitation effect'and the mechanical effect of the ultrasonic wave in extracting solvent are one. On the one hand, it can effectively break the cell wall of medicinal materials and dissolve the active ingredients into the extracting solvent in a free state. On the other hand, it can accelerate the molecular movement of the extracting solvent and make the extracting solvent and the active ingredients in medicinal materials contact quickly, dissolve and mix with each other.

The excellent temperature of ultrasonic vibration rod extraction is 40 - 60 degrees Celsius, so there is no need to equip a boiler to provide steam heating, which is conducive to saving energy and improving environmental pollution. More importantly, it has a protective effect on the active ingredients in medicines which are unstable under heat and easy to hydrolyze or oxidize. Ultrasound vibrating rod usually runs for about 30 minutes to obtain excellent results. Compared with traditional technology, the extraction efficiency is greatly improved, and it is not limited by the properties and molecular weight of Chinese medicinal materials. It is suitable for extraction of most kinds of Chinese medicinal materials and components (including liquid-liquid extraction and solid-liquid extraction). Therefore, the extraction of traditional Chinese medicine by ultrasonic vibrating rod has been more and more used by pharmaceutical factories.