초록 ▼

For the removal of sulfur compounds, especially H2S, from gaseous mixtures, said mixtures are scrubbed with a physical solvent which is later regenerated and reused. To the solvent are added (a) an oxidizing agent for converting the sulfur compounds into elemental sulfur, and (b) additive means for

For the removal of sulfur compounds, especially H2S, from gaseous mixtures, said mixtures are scrubbed with a physical solvent which is later regenerated and reused. To the solvent are added (a) an oxidizing agent for converting the sulfur compounds into elemental sulfur, and (b) additive means for increasing the settling rate of the thus-formed sulfur.

대표청구항 ▼

In a process for increasing the rate of settling of sulfur which is present in a physical solvent that is being reused and regenerated, said sulfur being formed from sulfide compounds which have been removed from gaseous mixtures in a separate, prior stage by scrubbing said gaseous mixtures with sai

In a process for increasing the rate of settling of sulfur which is present in a physical solvent that is being reused and regenerated, said sulfur being formed from sulfide compounds which have been removed from gaseous mixtures in a separate, prior stage by scrubbing said gaseous mixtures with said physical solvent which absorbs said sulfide compounds, the improvement comprising adding: (a) sulfur dioxide as an oxidizing agent to the physical solvent to react the sulfide compounds to elemental sulfur, and (b) ammonium thiocyanate in a concentration of about 1-20 g/l of said solvent as an additive for increasing the rate of settling of the said sulfur, said sulfur having a particle size of at least about 0.lmm, and separating the sulfur from said physical solvent under substantially isothermal conditions, wherein said solvent is selected from the group consisting of alcohols, ketones, N-methylpyrrolidone, dimethylformamide, polyethyleneglycol ethers, butyrolactone, or aromatic compounds.