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Definition: This calculator determines the mass fraction of solute in the raffinate phase after a single ideal stage of liquid-liquid extraction.
Purpose: It helps chemical engineers design and optimize liquid-liquid extraction processes for separation operations.
The calculator uses the formula:
Where:
Explanation: The formula calculates the equilibrium concentration of solute in the raffinate phase after one extraction stage.
Details: Accurate calculation of raffinate concentration is essential for designing efficient extraction processes and determining the number of stages needed for complete separation.
Tips: Enter the solute-free flowrates, distribution coefficient, and feed mass fraction. All values must be positive, with mass fraction between 0 and 1.
Q1: What is the distribution coefficient?
A: It's the ratio of solute concentration in the extract phase to that in the raffinate phase at equilibrium.
Q2: Why use solute-free flowrates?
A: Solute-free basis simplifies calculations by focusing on the carrier and solvent flows independent of solute concentration.
Q3: What's a typical distribution coefficient value?
A: Values vary widely (0.1-100+) depending on the solute-solvent system and conditions.
Q4: How does this relate to multi-stage extraction?
A: Single stage calculations are building blocks for designing multi-stage extraction cascades.
Q5: What if I get X1 = zC?
A: This indicates no extraction occurred - check your flowrates and distribution coefficient.