Abstract
High activity of metal complex catalytic systems comprising nitrogenous bases and copper sulfates, acetates, and basic carbonate in oxidation of hydrogen sulfide and light mercaptans with atmospheric oxygen was established. Their activities are close to that observed for the chlorine-containing analogs, while no corrosion effect is exerted. An increase in the initial concentration of H2S has negligible effect on its conversion rate. Mercaptans do not affect the H2S oxidation rate, whereas an increase in the hydrogen sulfide concentration decelerates mercaptan oxidation. This is a diffusion-controlled reaction; hence, intensification of mixing of the catalyst with the hydrocarbons affords a 30–40% increase in the demercaptanization efficiency. The efficiencies displayed in demercaptanization processes by the catalytic systems and by the conventional scavengers neutralizing light sulfur impurities were compared.
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