Monostage Liquid Centrifugal Contactors

PRINCIPLE OF OPERATION

Liquid liquid extraction consists in transferring one (or more) solute(s) contained in a feed solution to another immiscible liquid (solvent). The solvent that is enriched in solute(s) is called extract. The feed solution that is depleted in solute(s) is called raffinate.

Main features：

High extraction capacity in compact equipment.

Very low liquid residence time inside machine. 

Rapid operational equilibrium without entrainment of one phase in the other, --facilitating batch operation. 

High throughput.

Chemical and hydraulic equilibrium achieved rapidly. 

Compact installation. 

Efficient phase separation.

Main application：

Oil and Gas Production：（Solids Control、Slop Oils、Crude Dehydration、Crude Desalting、Produced Water Treatment、Drain Water Deoiling、Cleaning Diesel Fuel Oil、Cleaning of Crude Fuel Oil、Acid Flowback）

Chemical and Pharmaceutical：（Liquid-Liquid decants、Real Time Separation of Two Phase Condensates、Washing Organics、Liquid - Liquid Extraction）

Mining and Metals Recovery：（Multi-stage solvent Extractions、De-entrainment of Phases、Rapid Decants）

Environmental：（Bilge water/oil separation、Oil Spill Clean-up、Oil Separations from aqueous wastes、Groundwater separations and extraction）

Food：（Food oils separation/washing、Flavors and essential oils extraction）

Printing：（Waste Oil Recovery from Blanket Wash）

TECHNOLOGY:

One stage of a mixer-settler is comprised of two zones:

Mixer: a mixing chamber where a mechanical agitator brings in intimate contact the feed solution and the solvent to carry out the transfer of solute(s). The mechanical agitator is equipped with a motor which drives a mixing and pumping turbine. This turbine draws the two phases from the settlers of the adjacent stages, mixes them, and transfers this emulsion to the associated settler.

Settler: a settling chamber where the two phases separate by static decantation. Coalescence plates facilitate the separation of the emulsion into two phases (heavy and light). The two phases then pass to continuous stages by overflowing the light phase and heavy phase weirs. The height of the heavy phase weir can be adjusted in order to position the heavy/light interphase in the settling chamber based on the density of each one of the phases.