Sulfur dioxide, oxidative reactions with

Sulfides are converted to the oxide of the metal and sulfur dioxide by reaction with atmospheric oxygen ... 

Westvaco (1) A variation of the Claus process for removing hydrogen sulfide from gas streams, in which the sulfur dioxide is catalytically oxidized to sulfur trioxide over activated carbon at 75 to 150°C. The adsorbed sulfur trioxide is hydrated to sulfuric acid and then converted back to sulfur dioxide by reaction with the hydrogen sulfide at a higher temperature. 

ANTIMONIAL SAFFRON (1315-04-4) Contact with moisture, water, steam, or acids forms toxic and flammable gases, including hydrogen sulfide and sulfur dioxide. Violent reaction with strong oxidizers. Explosion may be caused by shock or on contact with powerful oxidizers. 

BROMURO de AZUFRE (Spanish) (13172-31-1) Combustible liquid. Reacts with moisture in air, steam, or oxidizers, emitting fumes of hydrogen bromide and sulfur dioxide. Reacts with water, forming hydrobromic acid and fumes of hydrogen bromide and sulfur dioxide. Violent reaction with strong oxidizers, chromyl chloride, diethylzinc, dimethyl sulfoxide, lead dioxide, nitric acid, potassium. Incompatible with hexafluoroisopropylide-neaminolithium, iron sulfide, nickel, red phosphorus. Attacks most metals in the presence of moisture. 

The HgCl2S03 complex stabilizes readily oxidized sulfur dioxide from reaction with oxidants such as ozone and nitrogen oxides. For analysis, sulfur dioxide in the scrubbing medium is reacted with formaldehyde ... 

Under oxidizing conditions, O and OH are the main chain carriers. Sulfur dioxide may recombine with these radicals in the reactions... 

The chemical reactions involved in this process were outlined in the patent, which laid the basis for this industry. However, many improvements in practice have been achieved from a more detailed knowledge of the gas phase kinetics of the sulfur dioxide oxidation step, as well as from a better understanding of the gas-liquid equilibria associated with the hydration step. 

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