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US 4,789,530 AGranted
Absorption of hydrogen sulfide with an alkali metal ethylenediaminetetraacetate and/or alkali metal nitrilotriacetate
AssigneePhillips Petroleum Company
InventorsMarvin M. Johnson, Ted H. Cymbaluk, Gerhard P. Nowack
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Abstract
A process for the preferential absorption of H.sub.2 S from a gas which contains H.sub.2 S and CO.sub.2 comprises contacting of the gas with a sorbent solution comprising alkali metal ethylenediaminetetraacetate and/or alkali metal nitrilotriacetate, in the substantial absence of oxidizing agents which can oxidize H.sub.2 S.
Claims20
A process for absorbing hydrogen sulfide comprising the step of contacting a gas feed comprising hydrogen sulfide and carbon dioxide with
- a solution comprising at least one dissolved sorbent selected from the group consisting of alkali metal ethylenediaminetetraacetate and alkali metal nitrilotriacetate,
- in the substantial absence of oxidizing agents which can oxidize hydrogen sulfide, under such contacting conditions as to absorb a greater portion per unit time of H.sub.2 S than CO.sub.2 from said gas feed.
A process for absorbing hydrogen sulfide comprising the steps of
- (a) contacting a gas feed comprising hydrogen sulfide and carbon dioxide in an absorption zone with a solution comprising at least one dissolved sorbent selected from the group consisting of alkali metal ethylenediaminetetraacetate and alkali metal nitrilotriacetate,
- in the substantial absence of oxidizing agents which can oxidize hydrogen sulfide, under such contacting conditions as to absorb a greater portion per unit time of H.sub.2 S than CO.sub.2 from said gas feed;
- and
- (b) substantially desorbing hydrogen sulfide, which has been absorbed by said solution, so as to obtain a regenerated solution.
1 more element
Dependencies are inferred from the claim text.