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 in liquid-liquid extraction processes.
Purpose: It helps chemical engineers determine the efficiency of solute transfer from feed to solvent in extraction operations.
The calculator uses the formula:
Where:
Explanation: The extraction factor compares the capacity of the solvent to extract solute relative to the amount of solute in the feed.
Details: A higher extraction factor indicates more efficient solute transfer. Values >1 indicate favorable extraction conditions.
Tips: Enter the raffinate point slope, solvent flowrate, and feed flowrate. All values must be > 0. Flowrates should be solute-free basis.
Q1: What does the raffinate point slope represent?
A: It's the distribution coefficient of solute between phases at the raffinate composition (mR = y/x at raffinate point).
Q2: What's a typical range for extraction factor?
A: Industrial processes typically aim for ε between 1.5 and 3 for efficient operation.
Q3: How do I determine the raffinate point slope?
A: It's determined experimentally from equilibrium data or thermodynamic models of the system.
Q4: Why use solute-free flowrates?
A: Solute-free basis simplifies calculations as solute concentration changes during extraction.
Q5: What if my extraction factor is less than 1?
A: ε < 1 indicates poor extraction efficiency - consider increasing solvent flow or changing solvents.