Ultrasonic Extraction Equipment

Ultrasonic extraction equipment of tea polyphenol

The principle of ultrasonic extraction

The superiority of ultrasonic extraction of Chinese medicinal materials is based on the special physical properties of ultrasonic waves. The solid-liquid extraction separation is mainly achieved by reducing the force between the target extract and the sample matrix mainly through the fast mechanical vibration wave generated by the piezoelectric transducer.

(1) Accelerate the motion of medium particles. 

(2) Cavitation. The propagation of ultrasonic waves in the liquid medium produces a special "cavitation effect". The "cavitation effect" continuously generates numerous micro-cavities with an internal pressure reaching thousands of atmospheres, and continuously "blasts" to generate a powerful shock wave on the microscopic level. , so that the components of Chinese medicinal materials are "bombarded" to escape, and the matrix of the medicinal materials is continuously eroded, and the medicinal components that do not belong to the plant structure are continuously separated. Accelerate the extraction and extraction of plant active ingredients. 

(3) The vibration homogenization of ultrasonic waves makes each point in the sample medium receive the same action, which makes the extraction of the whole sample more uniform.

Ultrasonic-assisted extraction of tea polyphenols, the optimal conditions are 70oC, 100W ultrasonic radiation with 80% ethanol, material-liquid ratio of 1:10 to extract 20min. The content of extracted tea polyphenols is high, which prevents tea polyphenols from being oxidized and maintains high quality. The process is:

Tea + ethanol - ultrasonic extraction - filtration - evaporative concentration - chloroform extraction - ethyl acetate extraction - ester recovery by evaporation - dried crude tea polyphenols - purification

Advantages of ultrasonic extraction

The process of ultrasonic extraction of tea polyphenols is simple, especially the combination of solvent method, precipitation method and resin adsorption method for extraction and preparation, and good results have been achieved. The method has the advantages of low extraction temperature, reducing the time required for extraction, improving extraction effect, avoiding the possibility of oxidation of tea polyphenols at high temperature for a long time, high recovery rate, small oxidation loss, time saving, energy saving, high extraction rate, etc. At the same time, the use of toxic solvents is avoided, the extraction process cost is low, the comprehensive economic benefit is remarkable, and the method has good industrial promotion value.

Hot Tags: Ultrasonic Extraction Equipment, China, suppliers, manufacturers, factory, custom, Ultrasonic Emulsification Equipment, ultrasound assisted extraction, ultrasonic solvent extraction, Cold water mushroom extraction, Ultrasonic Mushroom Extraction Equipment, Mushroom extraction equipment