Oxidation-reduction process

Details Oxidation-reduction process Oxidation-reduction process

1996-01-16

1997-01-07

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

4235731, 4235764, 4235765, 4235767, 423220, B01D 5352

Patent

active

055914195

ABSTRACT:
An improved oxidation-reduction process is disclosed that uses catalysts formulated from novel pyridine phosphonate ligands. When these ligands are combined with polyvalent metals the resulting catalyst compositions are useful for the conversion of hydrogen sulfide to solid sulfur. Catalysts containing these novel ligands exhibit resistance to metal precipitation and demonstrate little or no oxidative chemical degradation when employed to convert hydrogen sulfide to elemental sulfur.

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Oxidation of H.sub.2 S to S by Air With Fe(III)-NTA as a Catalyst: Catalyst Degradation; By Dian Chen, Ramunas J. Sep. Motekaitis, Arthur E. Martell, and Derek McManus; Canadian Journal of Chemistry, vol. 71, pp. 1524-1531, 1993.

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