Wheelabrator Clean Air Systems Inc.

L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

U.S. Filter/engineered Systems

Arthur E Martell

Derek McManus

Dian Chen

Ramunas J Motekaitis

A class of pyridine phosphonate compounds is disclosed that are useful as ligands in the one manufacture of oxidation-reduction catalysts. In particular, pyridine-2,6-disphosphonic acid is a specie of the pyridine phosphonate ligands that can be combined with a polyvalent metal to produce a catalyst to convert hydrogen sulfide to solid sulfur.

Pyridine-based compounds, especially phosphonates

Novel pyridine phosphonate ligands are disclosed that when combined with polyvalent metals results in useful catalyst compositions 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.

Tridentate metal ligands of certain pyridine phosphonic acids

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.

Oxidation-reduction process

A binuclear metal complex, comprising a metal-complexed ligand which ligand is formed by the reaction of a dialdehyde and a poly primary amine, which complex is capable of reacting reversibly with molecular oxygen.

Growing community of inventors

College Station, TX, United States of America

Arthur E Martell