Sulphuric acid also called as oil of vitriol, hydrogen sulphate, vitriol brown oil, matting acid, battery acid. Formula of sulphuric acid shows the combination of two hydrogen, one sulphur and four oxygen atoms.
Brief process description of contact process:
Sulphur powder is melted and burned in presence of oxygen to produce sulphur dioxide gas.
The heat from the hot gases recovered to produce steam in a boiler.
Three converter filed with catalyst are arranged in series where oxygen and sulphur dioxide are reacted to form sulphur trioxide and heat produced from the reaction is removed by the heat exchanger arranged in between them.
Sulphur trioxide produced form the converter is fed to economizer to heat the boiler feed water.
In oleum tower SO3 is absorbed by the oleum circulation and unabsorbed SO3 is absorbed in the absorber.
Water is added to the acid tank to produce H2SO4 by reacting with oleum.