Comparison of advantages between ultrasonic extraction and heat reflux extraction

Ultrasonic extraction mainly uses the principle of ultrasonic wave. Due to the properties of the ultrasonic wave itself, the mechanical effect and the thermal effect, due to these characteristics, it is uniquely advantageous for the extraction of traditional Chinese medicine. It uses its own cavitation. Effects and mechanical effects can quickly act on the cell wall of Chinese medicinal plants, causing separation of cellulose molecules and pectin molecules, destruction of the cell wall structure, and cellular contents such as polysaccharides, flavonoids, alkaloids, starches, etc. The macromolecule can break through the barrier of the cell wall, dissolve it into the extraction solvent, remove some macromolecular magazine materials by centrifugation and filtration, and separate the desired substances by macroporous resin adsorption, centrifugation, alcohol precipitation and the like. In general, the biggest advantage is that the yield is greatly improved compared with the traditional method, the energy consumption is small, the extraction time is short, and the economic benefit is high.

The hot reflux extraction is evolved on the basis of the so-called extraction, which plays a big role in the extraction process of traditional Chinese medicine. It has some advantages when extracting organic solvents such as alcohol as an extraction solvent. The boiling point of alcohol is low. After the extraction tank is boiled, the alcohol evaporates. After cooling, it is returned to the extraction tank and can be reused. However, it still has some shortcomings that cannot be ignored. The boiling time is long, the energy can be high, and some heat-sensitive substances are damaged. One has a long extraction time, a lot of labor, and low efficiency.

In summary of the above characteristics, ultrasonic extraction and heat reflux extraction have their own advantages, but it is most important to choose a device suitable for their own extraction process.

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