| 摘要 |
PCT No. PCT/FR86/00341 Sec. 371 Date Jun. 3, 1987 Sec. 102(e) Date Jun. 3, 1987 PCT Filed Oct. 3, 1986 PCT Pub. No. WO87/01960 PCT Pub. Date Apr. 9, 1987.Method for the selective removal of H2S from a H2S-containing gas by operating in a single column (1) comprising an upper absorption zone (11) and a lower regeneration zone (12) separated by a medial enrichment zone (17). A selective absorbing and regeneratable liquid capable of absorbing H2S is introduced at the upper portion of the column and flows successively into the zones (11) and (17) and finally into (12). The absorbing liquid meets the gas to be treated, which is injected through a conduit (9), in the zone (11) while the regenerated absorbing liquid is tapped at the bottom (4) of the column and brought back through a conduit (5) into said zone (11). At the head (2) of the column, a gas having a reduced content of H2S is discharged and by means of a system (18) provided in the zone (17) an acid gas fraction rich in H2S is tapped. Application to the production of a highly H2S enriched gas effluent from a gas containing H2S and an appreciable quantity of CO2.
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