Patent ID: 8303685
Filing Date: 2012-11-06
Classification: B01D

Abstract:
1. A regeneration Process for an aqueous, acid gas-rich absorption Fluid comprising at least one nitrogen-based chemical absorbing Agent for an acid gas, which absorption Fluid contains a chemically absorbed acid gas comprising a) hydrogen sulfide, b) carbon dioxide or c) both of said gases, said Process comprising 1) stripping acid gas from the acid gas-rich absorption Fluid in a pressure Vessel operated at a pressure in excess of about 50 psia and below about 300 psia, wherein heat is supplied to the Fluid in the Vessel by a reboiler in a sufficient quantity that the Fluid is at a temperature from 294° F. and below 400° F. to desorb pressurized gases at a pressure in the range of about 50 psia to below about 300 psia that are carried to an outlet of the Vessel, and thereafter 2) recovering an acid gas-rich gas stream from the outlet of the Vessel while maintaining the stream under a pressure in the range from 50 psia to 300 psia, wherein a control valve downstream from the outlet is used to control the operating pressure of the Vessel, and 3) introducing said gas stream into a first stage compressor to increase the pressure and reduce by compression the volume of said recovered gas stream.