Extraction Factor Formula:
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Definition: The Extraction Factor is defined as the ratio of the slope of equilibrium line to the slope of operating line at the feed point in liquid-liquid extraction processes.
Purpose: It helps chemical engineers determine the efficiency of solute transfer between phases in extraction operations.
The calculator uses the formula:
Where:
Explanation: The product of equilibrium slope and solvent flowrate is divided by feed flowrate to determine the extraction efficiency.
Details: Proper calculation ensures optimal design of extraction columns, predicts separation efficiency, and helps in scaling up processes.
Tips: Enter the equilibrium slope (mF), solvent flowrate (S'), and feed flowrate (F'). All values must be > 0.
Q1: What does the extraction factor tell us?
A: It indicates the potential for solute transfer - values >1 suggest good extraction, while <1 suggests poor extraction.
Q2: How is the equilibrium slope (mF) determined?
A: It's the distribution coefficient at feed conditions, typically from equilibrium data or correlations.
Q3: What are typical units for flowrates?
A: While kg/s is shown, any consistent mass flow units can be used (kg/h, lb/hr, etc.).
Q4: When would the extraction factor vary in a process?
A: It can change with temperature, composition, or if equilibrium relationship is nonlinear.
Q5: How does this relate to theoretical stages?
A: Higher ε values typically require fewer theoretical stages for the same separation.