Patent ID: 7033565
Filing Date: 2006-04-25
Classification: C01B

Abstract:
1. A process for the production of sulphuric acid from a sulphur dioxide containing feed gas with concentration of SO 2 fluctuating between 0 and 100 mole% SO 2 comprising the steps of treating the feed gas with an aqueous solution of diluted sulphuric acid comprising 0–50% by weight H 2 SO 4 at a temperature between the freezing point of said aqueous solution and 80° C.; during treating of the feed gas with the aqueous solution absorbing at least a part of SO 2 in the feed gas in the aqueous solution or desorbing at least a part of SO 2 from the aqueous solution, wherein the at least a part of SO 2 is desorbed by stripping the aqueous solution with the feed gas; and passing at least part of the thus treated feed gas to a sulphuric acid plant.