| 摘要 |
The process for selectively removing H2S and like sulfides from fluids containing them by contact with a cyanopyridine (e.g., a mixture of ortho and meta cyanopyridines) and an alkali hydrosulfide, preferably in a substantially hydroxyl-free solvent such as N-methyl pyrrolidone. Preferably, in the process an admixture of H2S and CO2 in natural gas is contacted with the cyanopyridine containing contacting solution to react the H2S with said cyanopyridine, the CO2 and/or like hydrocarbons are rejected from the contacting solution by mild heating and/or pressure reduction and thereafter H2S is regenerated by heating the remaining solution.
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