9 октября, 2015 
Pokraskin During the reduction of barite and the calcination of Sachtolith and lithopone, sulfur dioxide is liberated. This is removed from the waste gas in a purification stage, which is based on the reversible, temperature-dependent solubility of sulfur dioxide in polyglycol. The absorbed sulfur dioxide can be recovered as a liquid product or as a raw material for sulfuric acid. Traces of soluble barium in the residue from the dissolution of the fused BaS are removed by treatment with Na2SO4.
2.2.3
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