The contact process Flashcards
Temperature used
450*C
Pressure used
1-2atm
Catalyst used
Vanadium (V) Oxide V2O5
How is sulphur dioxide made in the contact process
Burn Sulphur in air S+O2–>SO2
How is sulphur trioxide make in the contact process
Reversible reaction
Forward is exothermic
2SO2+O2–>2SO3
Why is it not good to react water with sulphur trioxide to make sulphuric acid
Produces an uncontrollable fog of concentrated sulphuric acid
Making sulphuric acid in the contact process
Sulphur trioxide is absorbed in concentrated sulphuric acid
H2SO4+SO3–>H2S2O7 making fuming acid/oleum
Converts twice as much concentrated acid by adding water H2SO7+H20–>2H2SO4
Uses for sulphuric acid
Fertilisers, Detergents, paints, extracting whit pigment from titanium ores