Solvent cyclic extraction device

Abstract

The invention discloses a solvent cyclic extraction device, and the device comprises a layering pipe, a first adapter valve, a second adapter valve, a third adapter valve, a collecting bottle, a sample bottle, a cleaning bottle, a solvent extraction pump, a spiral pipe, a waste liquid barrel and a waste discharge pump. During use, an extraction solvent and a to-be-extracted sample are extracted through continuous circulation, the use amount of the solvent is reduced, the cost is low, the use is convenient, the problem of water removal of the extraction solvent is solved through the layering pipe, the collection bottle can be directly taken down, and the extraction solvent in the taken-down collection bottle can be directly fed to liquid chromatography, gas chromatography and other analytical instruments; therefore, the time for concentrating the extraction solvent is saved, errors caused in the extraction solvent transfer process are reduced, and the method has great practical value for extraction of small-batch samples.

Description

technical field [0001] The invention relates to the field of extraction, in particular to a solvent circulation extraction device. Background technique [0002] Extraction is a unit operation that takes advantage of the different solubility of components in a system to separate a mixture. That is to use the difference in solubility or partition coefficient of substances in two immiscible (or slightly soluble) solvents to transfer solute substances from one solvent to another. At present, the extraction devices of organic matter in water mainly include traditional liquid-liquid extraction and solid-phase extraction. Traditional liquid-liquid extraction devices have a wide range of applications, and the technology is mature. In addition, the application of automatic liquid-liquid extraction devices in recent years has solved the problem of high labor intensity. , but this method requires the use of a large amount of solvent, causing environmental pollution; the solid-phase ex...

AI Technical Summary

Problems solved by technology

At present, the extraction devices of organic matter in water mainly include traditional liquid-liquid extraction and solid-phase extraction. Traditional liquid-liquid extraction devices have a wide range of applications, and the technology is mature. In addition, the application of automatic liquid-liquid extraction devices in recent years has solved the problem of high labor intensity. , but this method requires the use of a large amount of solvent, causing environmental pollution; the solid-phase extraction device has a high degree of automation, but the steps are relatively complicated and expensive, and the operation cost is very high, and a certain amount of solvent is required to activate the extraction cartridge

However, when extracting small-dose samples, it mainly relies on pure manual operation, and there is no special extraction device for extraction operations, which requires high requirements for operators.

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