Sulfuric
acid synthesis

Overview:

Sulfuric acid (H2SO4) is synthesized from sulphur generated by the thermal
decomposition of iron pyrite (FeS2).

Done on (12/18/2004)

Iron pyrite
(12/18/2004)

Iron pyrite (FeS2) or fools gold in its raw form

Iron pyrite (12/18/2004)

Iron pyrite chips crushed into a flask.

Decomposition setup (12/18/2004)

Flask with iron pyrite with second flask inverted on top of it.

Decomposition setup (12/18/2004)

Flask with iron pyrite with is heated with propane torch.

Decomposition setup (12/18/2004)

Iron pyrite begins to thermally decompose.

Decomposition setup (12/18/2004)

Sulphur crystals begin to form on the top of flask.

Decomposition setup (12/18/2004)

Sulphur sublimes from lower flask and is deposited into upper flask.
Due to high temperatures, the sulfur is oxidized by oxygen present through
the side arm vents of the flasks. Sulfur dioxide / trioxide combined with
atmospheric water vapor to form sulfuric acid residue of the flask walls.

Decomposed iron pyrite and
dilute acid (12/18/2004)

Upper flask is filled with water, mixing with acid residue.

Dilute acid PH (12/18/2004)

PH strip indicates a PH of between 0 and 1.

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