1. What is Extraction Factor at Mean Slope of Equilibrium Curve?

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 between phases in extraction operations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \epsilon \) — Extraction Factor (dimensionless)
• \( m \) — Mean slope of equilibrium curve (distribution factor)
• \( S' \) — Solute free solvent flowrate (kg/s)
• \( F' \) — Solute free feed flowrate (kg/s)

Explanation: The product of equilibrium slope and solvent flow is divided by feed flow to determine the extraction efficiency.

3. Importance of Extraction Factor

Details: Proper calculation ensures optimal design of extraction equipment, efficient solute recovery, and cost-effective operation.

4. Using the Calculator

Tips: Enter the mean slope of equilibrium curve, solute-free solvent flowrate, and solute-free feed flowrate. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does the extraction factor indicate?
A: Values > 1 indicate efficient extraction, while values < 1 suggest poor solute transfer.

Q2: How is the mean slope of equilibrium curve determined?
A: It's typically obtained from experimental equilibrium data or thermodynamic models.

Q3: What are typical units for flowrates?
A: While kg/s is used here, any consistent mass/time units can be used as long as both flowrates have the same units.

Q4: When would the extraction factor be exactly 1?
A: When the operating line is exactly parallel to the equilibrium line (rare in practice).

Q5: How does this relate to theoretical stages?
A: Higher extraction factors typically require fewer theoretical stages for the same separation.