Patents Represented by Attorney, Agent or Law Firm Kathryn M. Sanchez
  • Patent number: 7524995
    Abstract: A continuous process for producing hexafluoroisopropanol is provided which comprises contacting hexafluoroacetone with hexafluoroisopropanol and hydrogen to produce a liquid feed stream; introducing the liquid feed stream to a reactor containing an immobilized hydrogenation catalyst to convert the hexafluoroacetone to hexafluoroisopropanol and provide a product stream; and recovering at least a portion of the hexafluoroisopropanol from the product stream. Preferably a portion of the product stream is recycled. The reactor can be a packed bed or stirred tank reactor.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: April 28, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Stephen M. Tieri, John Joseph Hagedom, James Arnold Schultz, Tiberiu M. Leib, Susanne Hawthorne Wolff, Sourav K. Sengupta, Gregory Paul Shankwitz
  • Patent number: 6828284
    Abstract: A composition that is or comprises a phosphorus-, perfluoropolyether-, and perfluoroalkyl-containing compound is provided. The compound comprises either (i) mono- or polyalkylene oxide linking groups between the phosphorus and the fluorocarbon group, or (ii) no linking group between the phosphorus and fluorocarbon group, or (iii) individual mixtures of (i) and (ii); and the fluorocarbon group can be the perfluoropolyether or perfluoroalkyl group. The compound can also be a partially esterified phosphate, a partially esterified phosphonate, a salt of a partially esterified phosphate, a salt of a partially esterified phosphonate, or mixtures of two or more thereof.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: December 7, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jon Lee Howell, Erik William Perez