Multifunctional continuous phase transition extraction device

Abstract

A multifunctional continuous phase transition extraction device comprises an extraction system, an analysis system and a solvent reclaiming system, wherein the extraction system comprises a first heat exchanger (8I), a extraction tank (1); the analysis system comprises a second heat exchanger (8II) and a first analysis tank (2I), a second analysis tank (2II), a first purifying pillar (3I), and a second purifying pillar (3II); the solvent reclaiming system comprises a first condenser (4I), a second condenser (4II), a first solvent tank (5I), and a second solvent tank (5II). According to the device, two paths of extraction circuits are formed. During the whole extraction process, the phase transition process of an extracting agent is instant and continuous; the extracting agent can be subjected to continuous phase transition and can be recycled, so that target objects can be extracted to the utmost extent, and accordingly, the efficiency is very high and the solvent consumption is small. Moreover, the whole process is performed in a sealed and low-pressure environment, the function is complete, and the purposes of safety and reliability are achieved. Therefore, the device is suitable for extraction of most natural products.

Description

technical field [0001] The invention relates to the technical field of extraction and separation, and is a new device for extraction and separation of multifunctional continuous phase change extraction technology. Background technique [0002] At present, the methods commonly used in the extraction of natural products include solvent extraction, reflux extraction, supercritical carbon dioxide extraction, subcritical extraction, etc. Solvent extraction method is widely used because of its low cost, simple equipment and wide application range, but there are problems such as low extraction efficiency, inconvenient filtration after extraction, and inconvenient solvent recovery. Reflux extraction, such as the Chinese patent with the publication number CN1454694A discloses a heat reflux high-pressure extraction-vacuum concentration process, which can extract, filter, and concentrate at the same time, but what the extraction device uses is a spray design, and the pressure is th...

AI Technical Summary

Problems solved by technology

Solvent extraction method is widely used because of its low cost, simple equipment, and wide application range, but there are problems such as low extraction efficiency, inconvenient filtration after extraction, and inconvenient solvent recovery.

Reflux extraction, such as the Chinese patent with the publication number CN1454694A discloses a heat reflux high-pressure extraction-vacuum concentration process, which can extract, filter, and concentrate at the same time, but what the extraction device uses is a spray design, and the pressure is the highest. It can reach 0.1MPa, the solvent used is limited, and the efficiency has not been greatly improved

Supercritical extraction technology, such as the Chinese patent with publication number CN201799133U discloses a supercritical CO 2 Fluid extraction device, this technology is environmentally friendly, the solvent is cheap and easy to get, and the substances can be separated better, but it also has very big disadvantages: 1. It only has a good extraction effect on non-polar substances, but it has a good extraction effect on polar substances. The extraction effect is poor; two, the extraction must be carried out under an ultra-high pressure state above 20MPa, and the extremely high pressure limits the enlargement of the equipment volume; three, its equipment manufacturing cost and maintenance cost are too high, these factors have limited this The development of technology, so it is not widely used

Subcritical extraction technology, such as the Chinese patent with publication number CN101642632A discloses a subcritical fluid extraction device and method for active ingredients of natural products. subcritical extraction medium, but there is a long extraction time and a large demand for extraction solvents, which cannot get rid of the problem of intermittent operation of conventional solvent extraction

The Chinese patent with publication number CN102258882A discloses "a device for dynamic extraction using subcritical fluid" based on the original basis of the Chinese patent with publication number CN101642632A "subcritical fluid extraction device and method for active ingredients of natural products" Improvements have been made to change the problem of the batch operation of conventional solvent extraction, but it also has a better extraction effect on non-polar substances, and poor extraction effects on polar substances.

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