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LIQUID-LIQUID SOLVENT EXTRACTION
(RCSEG)
Format: Video
O V E R V I E W
This unit introduces trainees to extraction equipment and processes that use one solvent to extract a solute that is in solution with another solvent. After completing this unit, trainees should be able to explain how liquid-liquid solvent extraction takes place, how various types of extraction equipment work, and what general tasks are performed on extraction systems.
O B J E C T I V E S
Extraction Principles
- Explain what is meant by liquid-liquid solvent extraction.
- Explain the basic difference between distillation and liquid-liquid solvent extraction.
- Define solute, solvent, carrier solvent, extraction solvent, interface, extract, and raffinate.
Extraction Systems
- List and explain the functions of the equipment in a typical liquid-liquid solvent extraction process.
- Describe what occurs in a simple liquid-liquid solvent extraction process.
Mixer-Settler Systems
- Explain how liquid-liquid solvent extraction occurs in the following mixer-settler systems: two-tank, box-type tank, and single-tank.
- Describe operator tasks typically associated with a mixer-settler system.
Extraction Columns
- Explain how liquid-liquid solvent extraction occurs in the following stationary columns: spray, perforated plate, and packed.
- Explain how liquid-liquid solvent extraction occurs in a mechanically agitated column and a hydraulically agitated column.
Extraction Column Operation
- Describe a typical control system for an extraction column and describe operator tasks typically associated with an extraction column.
Centrifugal Extractors
- Explain how liquid-liquid solvent extraction occurs in a typical centrifugal extractor and describe operator tasks typically associated with the startup and operation of a centrifugal extractor.
S U B J E C T S
Extraction Principles
- Distillation and liquid-liquid solvent extraction
- Liquid solutions
- Extraction terminology and example
Extraction Systems
- Simple extraction process
- Industrial extraction processes
Mixer-Settler Systems
- Two-tank systems
- Box-type mixer-settler systems
- Single-tank mixer-settler systems
- Operator responsibilities
Extraction Columns
- Stationary columns
- Agitated columns
Extraction Column Operation
- Extraction column control
- Operator responsibilities
Centrifugal Extractors
- Principles of operation
- Operator responsibilities
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