Liquid-Liquid Countercurrent Extraction Tower

Liquid-Liquid Countercurrent Extraction Tower

      Liquid-Liquid Countercurrent Extraction Tower Overview

Liquid-liquid extraction, also known as solvent extraction, involves adding a liquid solvent that is not completely miscible with the liquid mixture to create two phases. This process separates the active components by utilizing the different distribution relationships of certain components between the two liquid phases. It is a mass transfer process between liquids.

Liquid-liquid extraction features large processing capacity, excellent separation performance, high recovery rate, continuous operation capability, and ease of automatic control. It has been widely applied in the fields of petrochemicals, hydrometallurgy, environmental protection, and food industries.

       Extraction Applications

The Difference Between Distillation and Extraction: Distillation: It is a separation process that utilizes the different volatilities of the components in a mixture; Extraction: It is a separation process that takes advantage of the differences in solubility of a component in different solvents.

Liquid-liquid extraction is primarily used in the following situations:

1. The boiling points of the various components in the solution are close together, meaning the relative volatility of the components is nearly 1, making distillation economically unfeasible.

2. The solution contains a large amount of low-boiling point substances, or the latent heat of vaporization of the low-boiling point components is high. When recovering by distillation, a substantial amount of heat energy is required.

3. Certain components in the solution form a constant-boiling mixture, making it difficult to separate using distillation methods.

4. The components to be recovered from the solution are thermosensitive materials, which are prone to decomposition, polymerization, or other chemical changes during distillation.