Ultrasonic negative pressure circulating extraction device

Abstract

The invention discloses an ultrasonic negative pressure circulating extraction device used for extracting active components of natural products, mainly comprising a reflux evaporator, an ultrasonic generator, a vacuum pump, a low temperature cooling agent circulating pump, an infusion pump, an extraction flask and a collection flask, wherein, the vacuum pump can create a negative pressure state in the reflux evaporator to allow the collection flask which is connected with the reflux evaporator keep the negative pressure state, so as to allow the solvents to be benefit for the evaporation and condensation of the collected extract in the evaporator; the low temperature cooling agent circulating pump can allow the evaporator to keep low temperature inside, so as to allow the solvents vaporized to the evaporator to be subject to high efficient condensation and return to the extraction flask which is connected with the evaporator; and the infusion pump can continuously convey the feed liquid in the extraction flask in the ultrasonic generator to the collection flask to allow the feed liquid in the extraction flask to be continuously diluted by fresh solvents condensed by the evaporator, and the feed liquid extracted with ultrasonic assistance is continuously conveyed to the collection flask for the circulating of condensation. The invention has the advantages of combination of advantages of ultrasonic assistant extraction and reflux extraction, high extraction efficiency, and available extraction at normal temperature, and is especially suitable for extracting thermo sensitive components.

Description

technical field [0001] The invention relates to an extraction device for active components of natural products, in particular to an ultrasonic negative pressure cycle extraction device, which can be used for the extraction of active components in natural products, and is especially suitable for the extraction of heat-sensitive components. technical background [0002] The common equipment involved in the extraction of active ingredients in natural products includes classic percolation tanks, decoction tanks, Soxhlet heat reflux extraction equipment, etc., and modern microwave-assisted extraction equipment, ultrasonic-assisted extraction equipment, supercritical fluid extraction equipment, etc. [0003] Among the classic extraction equipment, Soxhlet heat reflux extraction equipment is the equipment with high solvent utilization rate and material extraction efficiency, including three parts: extraction cylinder, collection bottle and reflux pipe; one side of the extraction cyl...

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Problems solved by technology

When working, the material is placed in the extraction cylinder, the solvent in the collection bottle is evaporated by heating, the steam enters the return pipe through the steam pipe, and the temperature drops after meeting the condensation spiral tube and condenses into a liquid, which drips into the extraction cylinder through the connection port. Leach the material; when the height of the solvent in the extraction cylinder exceeds the highest point of the U-shaped tube, the extract in the extraction cylinder flows into the collection bottle through the tube; in the collection bottle, the solvent is heated and evaporated; in its working process, The solvent is continuously circulated between the extraction cylinder and the collection bottle, the material is always extracted by fresh solvent, and the material components in the extraction solution flowing into the collection bottle are continuously concentrated. The main problem of Soxhlet heat reflux extraction equipment is: solvent reflux repeated The utilization is realized by heating and evaporating the solvent, and the working temperature is relatively high, which is not suitable for the extraction of heat-sensitive components.

[0004] Among modern extraction equipment, ultrasonic-assisted extraction equipment has a faster extraction speed and can work at room temperature, and the extraction rate of material components is higher than that of Soxhlet heat reflux extraction equipment (Food Science, 2006, 27, 226-229) ;Ultrasonic assisted extraction equipment mainly includes two parts: ultrasonic generating part and extraction pool. Provide ultrasonic energy to the feed liquid in the extraction tank; it can also be made into a plate shape, placed at the bottom of the water tank, put the extraction bottle containing the feed liquid into the water tank, and the ultrasonic energy emitted from the plate is coupled to the extraction via the water in the water tank In the material liquid in the bottle, in the ultrasonic-assisted extraction equipment, the cavitation effect of the ultrasonic wave can accelerate the leaching and extraction of the ingredients in the material, and the secondary effect of the ultrasonic wave can accelerate the diffusion and release of the ingredients to be extracted and fully mix with the solvent, so the equipment can Faster extraction speed can be obtained at room temperature. The main problem of this type of equipment is that the extraction solvent cannot be recycled like Soxhlet heat reflux equipment. With the continuous dissolution of material components, its concentration in the material liquid continues to increase. , the further dissolution of the material components will become more and more difficult. In order to fully extract the components in the material, the only way to increase the amount of solvent is to increase the amount of solvent used, resulting in a large amount of solvent and an increase in the workload of subsequent concentration.

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