Method for scrubbing natural gas

Details Method for scrubbing natural gas Method for scrubbing natural gas

2004-02-24

2009-12-08

Johnson, Edward M (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

C423S230000

Reexamination Certificate

active

07628966

ABSTRACT:
The present invention is a process for removing hydrogen sulfide gas from natural gas by contacting a flow of sour natural gas containing hydrogen sulfide gas with a scavenging agent including a group IIA metal hydroxide such as calcium hydroxide for a sufficient amount of time to form calcium sulfide and water to yield natural gas that is substantially depleted of hydrogen sulfide gas. Sour natural gas may be percolated through a column containing a scavenging agent such as calcium hydroxide suspended as a fine particulate in water or a bed of dry calcium hydroxide granules. The scavenging agent may be periodically or continuously replenished with fresh scavenging agent rich in the selected group IIA metal hydroxide.

REFERENCES:
patent: 5658541 (1997-08-01), Matros et al.
patent: 5858212 (1999-01-01), Darcy

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