Patent ID: 6521200
Filing Date: 2003-02-18
Classification: B01J,C01B,Y02P,Y10S

Abstract:
A process for the recovery of sulphur trioxide, solutions of sulphuric acid, or organic derivatives thereof, using organic compounds, comprising the steps of:(a) passing a mixture of SO2 and an oxygen-containing gas over an activated carbon catalyst at a temperature of at least 15Â° C.; (b) stripping the activated carbon of (a) with either (i) a liquid organic compound selected from the group consisting of ketones, ethers, decalin, tetrahydrofurans, sulpholanes, glymes and formamides and which is non-reactive with sulphur trioxide or sulphuric acid, or (ii) a liquid organic compound capable of forming organic sulphates or sulphonates by reaction with sulphur trioxide or sulphuric acid; and (c) recovering the products so obtained.