The chemical behavior of low valence sulfur compounds. X. Disproportionation of thiosulfate, trithionate, tetrathionate and sulfite under acidic conditions.

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概要

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• The disproportionation of thiosulfate, trithionate, tetrathionate and sulfite in acidic solutions has been studied at relatively high temperatures. Thiosulfate hardly decomposes in the absence of sulfuric acid, even at 150 °C, but decomposes very easily in the presence of sulfuric acid at 70 °C, forming elemental sulfur, tetrathionate and sulfite. Trithionate decomposes to thiosulfate and sulfate at 70 °C, while tetrathionate decomposes only at temperatures above 130 °C after an induction period forming thiosulfate as an intermediate. Sulfite undergoes disproportionation, giving thiosulfate and sulfate at 150 °C, and then elemental sulfur and sulfate accompanied by intermediate formation of tetrathionate. A disproportionation pathway of low valence sulfur oxyacids including thiosulfate, trithionate, tetrathionate and sulfite has been proposed.

• 公益社団法人 日本化学会の論文

著者

• Okabe Taijiro

  Department of Applied Chemistry, Faculty of Engineering

• Takei Yoshiaki

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Mizoguchi Tadaaki

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

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