Regeneration of acid gas-containing treatment fluids
First Claim
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.
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0 Petitions
Reexamination
Accused Products
Abstract
An improved acid gas regeneration and injection process wherein the separated acid gas stream emerging from a regenerator is compressed and injected into subsurface reservoir, the improvement comprising conducting the acid gas separation in the regenerator under pressure that exceeds 50 psia and does not exceed 300 psia.
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Citations
10 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- F. and below 400°
Specification