Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1995-05-12
1995-12-26
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423231, 4232441, 4232451, 423443, 423562, C01B 1716, C01B 1720
Patent
active
054785413
ABSTRACT:
The present invention provides a method for separately removing mercaptans and hydrogen sulfide from a hydrocarbon gas stream by passing the gas through a bed which includes iron oxide which catalyzes the formation of disulfides and trisulfides from mercaptans and also reacts with at least part of the hydrogen sulfide to form acid-stable solids; causing the di- and trisulfides to exit the bed in the gas phase; and removing and recovering the di- and trisulfides by adsorption or condensation. Any remaining hydrogen sulfide may be scavenged from the gas stream by passage through a bed containing iron oxide similar to that used first above. If the gas stream contains substantial amounts of hydrocarbon aerosols, they should be filtered out in advance of the bed.
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"Mercaptan Removal Rate Exceeds 99% at Canadian Gas Plant" by Bill Judd Oil and Gas Journal 10 Aug. 1993 pp. 81-83.
"H.sub.2 S Removal System Shows Promise Over Iron Sponge" by Alvin Samuels Oil and Gas Journal of Feb. 1990 Penn Well Publishing Co.
Fox Irwin
Samuels Alvin
Gross Jerome A.
Straub Gary P.
Vanoy Timothy C.
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