Fractionating column

High school (ages 12+)
Science & Technology

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Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/fractionating-column

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the efficiency metric?Often quantified by the concept of 'theoretical plates', representing separation stages
2. What is the primary industrial application?Crude oil refining into fuels, lubricants, and petrochemical feedstocks
3. How does a fractionating column separate liquids?When the mixture is heated at the bottom, the lighter parts vaporize and rise. As they climb, they cool and condense, while the heavier parts stay lower, so the column can separate them step by step.
4. Why do liquids go up and down in the column?The vapor that rises meets cooler liquid that comes down, creating a counter‑current flow that helps the liquid and vapor swap heat and separate more cleanly.

Vapor-Liquid Equilibrium: The state where the rate of vaporization equals the rate of condensation for a substance.
Reflux Ratio: The ratio of the liquid returned to the column to the liquid withdrawn as product, affecting separation efficiency.
Azeotrope: A mixture of liquids that has a constant boiling point and composition, making it difficult to separate by simple distillation.