Patent ID: 6531103
Filing Date: 2003-03-11
Classification: C10G,C10L

Abstract:
A process for removing sulfur compounds including sulfur in a (âˆ’2) oxidation state from a feed streams, said process comprising the steps of:(a) contacting a feed stream containing at least one sulfur compound including sulfur in a (âˆ’2) oxidation state with a regenerable sulfur selective absorbent comprising a metal cation in a given oxidation state complexed with an organic ligand; (b) forming with the absorbent and the sulfur compound a plurality of sulfur-metal cation coordination complexes in which the oxidation state of the sulfur compound and the metal ion remains essentially unchanged; (c) separating the sulfur-metal cation coordination complexes from the feed stream; and (d) thermally regenerating the absorbent by disassociating the sulfur compound from at least some of the plurality of complexes.