PROCESS FOR CONDENSATION OF SULPHURIC ACID VAPOURS TO PRODUCE SULPHURIC ACID

摘要

A process for production of sulphuric acid comprising condensing sulphuric acid vapour from a gas mixture containing 0.01 to 10 vol.% of H2SO4 vapour calculated at complete hydration of SO3 in the gas to H2SO4 and 0 to 50 vol. % of water vapour by cooling of the gas in a sulphuric acid tower, wherein a stream containing NH3 is added upstream of the tower an an amount corresponding to 0.01-100 ppm NH3 by vol. in the gas stream at the entry of the tower.