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Sulfreen
Sulphur, 1974, (117), 40.
Hydrocarbon Process. Int. Ed., 1975, 54(4), 106.
Sulfreen Also known as the SNPA process. A variation of the *Claus process for removing hydrogen sulde
from gas streams by reaction with sulfur dioxide to produce elemental sulfur. It differs from the Claus process
in using a lower temperature, causing the sulfur to be retained on the catalyst. The catalyst was originally
carbon, but alumina is used now. Developed by Lurgi Gesellschaft für Warme- und Chemotechnik and the
Société Nationale des Pétroles d’Aquitaine. More than 53 units were operating or being designed in 2000.
See also HYDROSULFREEN, Oxysul ...