The production of the  intermediates involved in this reaction is sometimes obtained by burning the product of the (*) Frasch process, but more often by adding its dioxide to water.
A possible final product of this process is a fuming form of oleum. One variety of this process  employs pellets of silicate compound filled with a vanadium oxide. The production of the  intermediates involved in this reaction is sometimes obtained by burning the product of the (*) Frasch process, but more often by adding its dioxide to water. Largely replacing the lead chamber process, for 10  points— identify this industrial process which combines sulfur trioxide with water to form sulfuric acid.
A possible final product of this process is a fuming form of oleum.
contact process