Method of removing gaseous sulfides from gaseous mixtures

摘要: THE PROCESS FOR SELECTIVELY REMOVING H2S AND LIKE SULFIDES FROM FLUIDS CONTAINING THEM BY C ONTACT WITH A SUBSTITUTED AROMATIC NITRILE HAVING AN ELECTRON-ATTRACTING SUBSTITUENT ON RING AT LEAST AS STRONG HALOGEN (E.G., ISOPHTHALONITRILE) ALKALI HYDROSULFIDE IN SUBSTANTIALLY HYDROXYL-FREE SOLVENT SUCH N-METHYL-2PYRROLIDONE. PREFERABLY, ADMIXTURE OF CO2 NATURAL GAS IS CONTACTED T HE ONTACTING SOLUTION TO REACT SAID NITRILE, AND/OR HYDROCARBONS ARE REJECTED CONTACTING MILD HEATING PRESSURE REDUCTION THEREAFTER REGENERATED REMAINING SOLUTION.