Multistage continuous extraction tower and process

Abstract

The invention discloses a multistage continuous extraction tower and relates to the technical field of organic chemical extraction. The multistage continuous extraction tower comprises a tower body, wherein an extraction phase standing separation chamber located at the upper portion and a raffinate phase standing separation chamber located at the lower portion are formed in the tower body, an extraction phase outlet is formed in the extraction phase standing separation chamber, a raffinate phase outlet is formed in the raffinate phase standing separation chamber, and an extraction layer is arranged on the tower body between the extraction phase standing separation chamber and the raffinate phase standing separation chamber; a water phase feeding port is formed in the tower body portion between the extraction phase standing separation chamber and the extraction layer, and an organic phase feeding port is formed in the tower body portion between the raffinate phase standing separation chamber and the extraction layer. The technical problems of poor mixing effect, short extractant and extract contact time, small contact area and poor extraction separation effect of an existing extraction tower are solved, continuous extraction operation is achieved, the extraction efficiency and extraction precision are effectively improved, and the multistage continuous extraction tower is suitable for industrial operation.

Description

technical field [0001] The invention relates to the technical field of organic chemical extraction, in particular to a multi-stage continuous extraction tower and a process using the extraction tower. Background technique [0002] As an important material separation method in chemical production, extraction is widely used. At present, the structures of extraction towers used in industrial production are mainly packing type, pulse type and plate type, etc. There are many studies on the structure of extraction towers. The existing extraction towers generally have problems of insufficient mixing, small contact surface, and poor separation effect. In addition, due to the different distribution coefficients of the extract in the two phases during the extraction process, it is difficult to obtain the ideal extraction effect by simple one-stage extraction. Therefore, it is of great significance to study an extraction tower with simple structure, easy operation and industrialization...

AI Technical Summary

Problems solved by technology

[0003] In view of the above defects, the purpose of the present invention is to provide a multi-stage continuous extraction tower and process, aiming to solve the problems of poor mixing effect existing in the existing extraction tower, short contact time between the extractant and the extract, small contact area, and poor extraction and separation effect technical issues

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