Conversion of Hydrogen Sulfide and Sulfur Dioxide to Polymeric Sulfur
a Faculty of Industrial Technologies TnUAD, Púchov, Slovakia, b Continental Matador Rubber Púchov, c VUP Prievidza
The 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.
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