Conversion of Hydrogen Sulfide and Sulfur Dioxide to Polymeric Sulfur
AbstraktThe article deals with the conversion of hydrogen sulfide and sulfur dioxide to polymeric sulfur H2S is oxidized with SO2 at a mole ratio of 2:1 in aqueous-alcoholic H2SO4 or HCl in the presence of ethylene glycols (up to poly(ethylene glycol) or glycerol) at 690 °C. The total yield of S is ca. 99.7 %. The product contains 7080 wt.% of polymeric S in a mixture with S cyclooctamer. At 2040 °C, the content of polymeric S is 70.470.9 % and its thermal stability is 5275 %. Smaller amounts of polymeric S formed when ethylene glycol or higher alcohols are used. The use of glycerol leads to a higher thermal stability of polymeric S.