Patents by Inventor William H. Manogue

William H. Manogue has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multistep synthesis of hexafluoropropylene
    Patent number: 5043491
    Abstract: The present invention relates to multistep syntheses of hexafluoropropylene from propane, propylene or partially halogenated acyclic three-carbon hydrocarbons. In all these syntheses the first step is a vapor-phase chlorofluorination of the starting material to the unsaturated chlorofluorocarbon CF.sub.3 CClCCl.sub.2.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: August 27, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James L. Webster, Elrey L. McCann, Douglas W. Bruhnke, Jan J. Lerou, Leo E. Manzer, William H. Manogue, Paul R. Resnick, Swiatoslaw Trofimenko
  • Catalytic equilibration to improve the relative yield of selected halocarbons
    Patent number: 5030372
    Abstract: Gas phase and liquid phase processes are disclosed which use interconversion of CF.sub.3 CHFCl and CF.sub.2 HCF.sub.2 Cl in contact with catalyst consisting essentially of halided aluminum oxide and/or aluminum halide at elevated temperatures to increase the mole ratio of one of said compounds in a composition relative to the other. Also disclosed in use of said interconversion along with hydrogenolysis in processes for producing mixtures of CF.sub.3 CH.sub.2 F and CF.sub.2 HCF.sub.2 H from certain compositions comprising CF.sub.2 HCF.sub.2 Cl such that the mole ratio of CF.sub.3 CH.sub.2 F to CF.sub.2 HCF.sub.2 H in the product mixtures produced from said compositions may be increased or decreased.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: July 9, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William H. Manogue, V. N. Mallikarjuna Rao, Frank J. Weigert
  • Catalytic hydrogenation of carboxylic anhydrides to esters or lactones
    Patent number: 4973713
    Abstract: A process for the production of esters or lactones, comprising reacting in the presence of a catalyst and under hydrogenation conditions hydrogen and an acyclic or cyclic carboxylic anhydride to produce the corresponding ester or lactone, wherein the catalyst is a supported catalyst comprising:(a) a group VIII metal, Re and Fe;(b) a group VIII metal on TiO.sub.2 ;(c) Ru and at least one of Re, Ag or Cu; or(d) Pd and Fe.Preferably, the anhydride has the formula ##STR1## and is reacted to form an ester of the formula ##STR2## or a lactone of the formula ##STR3## wherein R and R.sup.1 independently are lower alkyl or cycloalkyl; R.sup.2, R.sup.3, R.sup.4, R.sup.5 independently are hydrogen, lower alkyl, cycloalkyl or aryl; and wherein R.sup.3 and R.sup.4 taken together may form a saturated or unsaturated ring, or an aromatic ring. The more preferred starting material is phthalic anhydride.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: November 27, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: William H. Manogue