In the field of organic synthesis, water washing, as a basic and crucial process, runs through the production process of many products. Its important value lies in effectively removing the residual acid, alkali, salt and other water-soluble impurities in the reaction solution, laying a solid foundation for the further purification of subsequent products.
The traditional water washing process generally relies on the steps of adding water, stirring and standing to separate the layers in the reactor, which is complicated and time-consuming. When the water phase is in the upper layer, the stirring speed needs to be carefully controlled to guide the water to slowly penetrate into the lower organic phase, and the water is washed by stirring, and then the upper water is discharged by the overflow mechanism; if the aqueous phase is in the lower layer, it needs to be repeatedly stirred, stood, and separated, and it takes many cycles to meet the process requirements. This process not only consumes a huge amount of water resources, but also has cumbersome operations and is difficult to achieve continuous production.
Application Of Centrifugal Extractor In Water Washing Of Organic Synthesis
In the water washing process of organic synthesis, the organic phase to be washed and aqueous phase are introduced into the center of the centrifugal extractor's drum. As the drum rotates at high speed, the heavy phase (such as the aqueous phase) in the mixture is subjected to greater centrifugal force due to its greater density and is thrown to a position farther from the drum wall to form an outer liquid ring; while the light phase (such as the organic phase) is located in the inner layer close to the center due to its lower density. In this way, the two liquids form two obvious annular flow areas inside the drum. More importantly, under the strong centrifugal force, the two phases are quickly and thoroughly separated, greatly shortening the water washing time.
The centrifugal extractor can be produced continuously without intermittent operation like the traditional water washing process. At the same time, its high degree of automation facilitates the automatic control of the process and improves production efficiency and stability.
The application principle of the centrifugal extractor in the organic synthesis water washing process is mainly based on the stratification effect caused by centrifugal force and density difference and mass transfer and separation achieved by high-speed rotation. Its high efficiency, energy saving, continuous production and automation make the centrifugal extractor one of the indispensable important equipment in modern chemical production.
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