Wiewiorowski process

Townsend Process, 841 IFP Clauspol 1500 Process, 843 Wiewiorowski Process, 846 UCBSRP Process, 846... 

The first sulfur dioxide-based process was the Townsend process, developed in 1958. This process never advanced beyond the pilot-plant stage due to mechanical and corrosion problems. It was followed by the IFF Clauspol 1500 and the Wiewiorowski processes in 1969. The IFF process is closely related to the Townsend process, but is restricted in application to the treatment of Claus tail gas. The low cost and simplicity of the IFF process has attracted some commercial interest however, the Wiewiorowski process was never commercialized. 

Wiewiorowski A process proposed for removing hydrogen sulfide from industrial gases by reacting it with sulfur dioxide in molten sulfur in the presence of an amine catalyst. Invented by T. K. Wieriorowski at the Freeport Sulfur Company, but not known to have been commercialized. 

In this process, which was disclosed by Wiewiorowski (1%9) of the Freeport Sulfur Company (Anon., 1970), the reaction between hydrogen sulfide and sulfur dioxide takes place in molten sulfur within the temperature range of 240°-320 F (low-viscosity range of liquid sulfur). A basic nitrogen compound, such as ammonia or an amine, in concentrations of 1 to 5,000 ppm is added as the catalyst. 

---