BASF Catasulf process

The BASF Catasulf process is a direct oxidation sulfur removal process that uses an isothermal reactor for heat removal. See the prior discussion in this chapter under the Isothermal Reactor Concepts section for more information. 

The Claus reaction continues in the catalytic step with activated aluminum(III) or titanium(IV) oxide, and serves to boost the sulfur yield. More hydrogen sulfide (H2S) reacts with the SO2 formed during combustion in the reaction furnace in the Claus reaction, and results in gaseous elemental sulfur. About one-third reacts via Eq. (34.11) and two-thirds via Eq. (34.12). Further process modification such as the COPE, Lurgi OxyClaus, BASF Catasulf, and Superclaus were described by Kohl and Nielsen [21]. 

BASF of Ludwigshafen, Germany, has developed the Catasulf process (Anon., 1992) which utilizes an isothermal tubular reactor. The feed gas containing 5-15 mol% of hydro-... 

Catasulf A catalytic process for converting hydrogen sulfide in gas streams to elemental sulfur. The gas, to which a stoichiometric quantity of air or oxygen has been added, is passed over the hot catalyst. Invented in 1983 by BASF. One plant had been built as of 1990. 

BASF, 1992, Catasulf in Gas Process Handbook 92, Hydro. Process, April, p. 91. 

---