Patent ID: 6071484
Filing Date: 2000-06-06
Classification: B01D

Abstract:
A process for treating a sour process gas or liquid to remove acid gas compounds comprising:providing a sour process gas or liquid comprising acid gas compounds;contacting said sour process gas or liquid with a lean amine treating solution in an absorber, the lean amine treating solution having a first concentration of residual acid gas compounds, to reduce the concentration of acid gas compounds in the sour process gas or liquid by absorption into the lean amine treating solution; and then furthercontacting said process gas or liquid having reduced concentration of acid gas compounds with an ultra-lean amine treating solution, the ultra-lean amine treating solution having a second concentration of residual acid gas compounds lower than the first concentration, to effect further reduction in the concentration of acid gas compounds in the sour process gas or liquid, wherein said lean amine solution enters a counter-current absorber to contact said sour process gas or liquid at a point below the entry point for the ultra-lean amine.