5 articles
Brimstone
Brimstone is an old English name for the element sulfur, from Old English for "burning stone", now used mainly in the biblical phrase "fire and brimstone".
Contact process
The contact process is the dominant industrial method for manufacturing sulfuric acid, oxidizing sulfur dioxide over a vanadium catalyst to yield acid of 98–100% purity.
Oleum
Oleum, also known as fuming sulfuric acid or Nordhausen acid, is a solution of sulfur trioxide in sulfuric acid that fumes strongly and reacts violently with water.
Sulfur dioxide
Sulfur dioxide, also called sulfurous anhydride, is a colorless, pungent gas (SO₂) released mainly by fossil fuel combustion and volcanoes, and used as a food preservative.
Sulfur trioxide
Sulfur trioxide, also called sulfuric anhydride, is the oxide of sulfur in its +6 state and the anhydride of sulfuric acid, made industrially in the contact process.