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Article: Elemental sulfur is produced from sulfur dioxide, with no byproduct pollutants. (Chementator).
- Article from:
- Chemical Engineering
- Article date:
- March 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 Access Intelligence, LLC. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Offgases from the flash smelting of sulfide minerals typically contain about 40 vol. % sulfur dioxide that is recovered and converted to sulfuric acid onsite. This is a handy way to deal with the S[O.sub.2] if there is a local market for the acid, but not so convenient if the product has to be shipped for a long distance.
A process that converts the S[O.sub.2] to readily transportable elemental sulfur has been developed by Hong Yong Sohn, a professor of metallurgical engineering at the University of Utah (Salt Lake City; utah.edu). Offgas is passed through a fluidized or packed bed of calcium sulfide, which reacts with the oxygen in the S[O.sub.2] to form calcium ...