Patents Assigned to U.S. Filter/Engineered Systems
  • Pyridine-based compounds, especially phosphonates
    Patent number: 5808072
    Abstract: 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.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: September 15, 1998
    Assignee: U.S. Filter/Engineered Systems
    Inventors: Derek McManus, Arthur E. Martell, Dian Chen
  • Oxidation-reduction process
    Patent number: 5698172
    Abstract: An improved oxidation-reduction process is disclosed that uses a non-aqueous polyvalent metal catalyst system to remove volatile sulfur contaminants from gas streams. In addition to desulfurizing, the process also is useful for decarbonating and dehydrating process gas streams.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: December 16, 1997
    Assignee: U.S. Filter/Engineered Systems
    Inventors: Derek McManus, Myron Reicher, Barret A. Ferm