Hydrofluoric acid

Production

Industrially, hydrofluoric acid is produced from the mineral fluorspar, also known as calcium fluoride (chemical formula CaF2) and concentrated sulfuric acid. When combined at 250°C, these two substances react to produce hydrogen fluoride according to the chemical equation

Related Topics:
Fluorspar - Chemical formula - Sulfuric acid - Chemical equation

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:CaF2 + H2SO4 → 2 HF + CaSO4

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The vapors from this reaction are a mixture of hydrogen fluoride, sulfuric acid, and a few minor byproducts, from which hydrogen fluoride can be isolated by distillation.

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