| CPC B01D 53/1406 (2013.01) [B01D 53/1425 (2013.01); B01D 53/1468 (2013.01); B01D 53/18 (2013.01); B01D 53/52 (2013.01); B01D 53/78 (2013.01); C01B 3/52 (2013.01); C07C 7/11 (2013.01); C10L 3/103 (2013.01); B01D 2252/204 (2013.01); C01B 2203/0415 (2013.01); C01B 2203/0485 (2013.01); C10L 2200/0263 (2013.01); C10L 2290/545 (2013.01)] | 11 Claims |
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1. A process for amine treating acid gas-containing gas streams, the process comprising:
introducing a first lean amine solution and a high pressure hydrogen recycle gas from a hydrocracker or a hydrotreater system directly into a high-pressure (HP) absorber unit, wherein the hydrogen recycle gas has a pressure in a range of from 50 bar to 150 bar and wherein temperature of the first lean amine solution is maintained about 10° C. greater than temperature of a HP hydrogen recycle as feed;
operating the HP absorber unit such that a rich HP amine solution and a HP treated gas are produced;
introducing the rich HP amine solution from the HP absorber unit into a flash drum;
operating the flash drum such that a flashed sour gas and a flash drum rich amine solution are produced from the rich HP amine solution;
introducing the flashed sour gas into a low-pressure (LP) absorber unit,
wherein the flash drum is positioned between the HP absorber unit and the LP absorber unit, and wherein the flash drum operates at a pressure in a range of from 1 bar to 3 bar greater than the pressure of the LP absorber unit and at a pressure that is less than a pressure of the HP absorber unit; and
operating the LP absorber unit such that a rich LP amine solution and a LP treated gas are produced, wherein the LP absorber removes at least 99.95 mole % of the hydrogen sulfide introduced into the LP absorber unit to produce the LP treated gas.
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