What did Sulfur Purification by Sublimation look like?

Natural sulfur is a yellow lumpy mass containing impurities. After purification, it becomes a bright yellow powder or crystalline form of high purity.

How did Sulfur Purification by Sublimation work?

Natural sulfur ore → placed in a sealed container and heated → sulfur sublimes at 444.6°C → sulfur vapor rises → encounters cool vessel walls → condenses as flowers of sulfur (sulfur powder) → collected → high-purity sulfur obtained → residual slag remains at the bottom.

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Sulfur Purification by Sublimation

Sublimation purification of natural sulfur: heating sulfur ore to sublime it (solid → gas → solid), then condensing and collecting pure sulfur, separating out earth and other impurities.

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Scientific Principle

Sublimation: S(s) → S(g) → S(s). Different substances sublime at different temperatures; this difference is exploited for separation.

硫磺提纯

Sulfur Purification by Sublimation

Scientific Principle

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