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The solution is regenerated by heat to provide a sulfur-rich gas, which can be used to make elemental sulfur,
sulfuric acid, or sulfur dioxide. A small amount of sodium sulfate is produced, which must be crystallized
out and disposed of. Initially, the process used the potassium salts. Developed in the late 1960s. Thirty-eight
plants had been built by 1992.
British Patent 1,557,295.
Hydrocarbon Process. Int. Ed., 1975, 54(4), 111.
Ford, P.G., in The Problem of Acid Emissions, Institution of Chemical Engineers, Rugby, England, 1988, 151.
Kohl, H.L. and Nielsen, R.B., Gas Purication, 5th ed., Gulf Publishing Co., Houston, TX, 1997, ...