Sulfuric acid has the formula of H2SO4. Sulfuric acid is the most important sulfur compound and one of the largest volume industrial chemicals. To produce it by the method known as contact process, sulfur is first burned in air to yield dioxide SO2. The subsequent oxidation of SO2, is slow reaction, therefore a catalytic surface made of platinum or vanadium pentoxide is required. Sulfur trioxide reacts with water to yield sulfuric acid, because the oxide reacts with water to yield sulfuric acid; because the direct reaction of SO2 and water produces a mist of H2SO4 that is difficult to condense, the final stage of production takes place in two steps, SO2 is first dissolved in H2SO4 to produce pyrosulfuric acid; H2SO4, then sulfuric acid is produced by subsequent dilution of H2S2O2 with water:
SO2 + H2SO4 → H2S2O2
H2S2O2 + H2O → 2 H2SO4
No comments:
Post a Comment