Способ получения триоксида серы
||SU 1206231 A
||Jul 18, 1984
||Jan 23, 1986
SO3 is produced by oxidn. of SO2 under unsteady-state conditions. To increase the degree of conversion and assure a stable operating regime of the catalytic unit, the reacted gas from the unsteady-state oxidn. stage is sent to an auxiliary catalyst bed operating under steady-state conditions with a contact time of 2-5 s. About 5-25 vol.% of the reacted gas is withdrawn from the 1st oxidn. state and mixed with the primary flow before feeding to the final oxidn. stage.