Patents by Inventor Andrea M. Wallo

Andrea M. Wallo 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).

  • Selective conversion of acrylonitrile into 1,4-dicyano-1-butene catalyzed by plymer-bound alkyl diarylphosphinites
    Patent number: 4661615
    Abstract: Selective conversion of acrylonitrile into 1,4-dicyano-1-butene by contacting a liquid phase comprising acrylonitrile with an effective amount of a polymer-bound alkyl diarylphosphinite catalyst having the formula I: ##STR1## wherein the trivalent phosphorus is substituted by one alkoxy group and one aryl group and wherein the third bond of phosphorus is a P--C bond to a pendant aryl group of the polymer matrix, such as polystyrene cross-linked with divinylbenzene is disclosed. Treatment of the liquid phase, prior to contacting same with the polymer-bound catalyst, with a drying agent comprising a polymer-bound dialkyl arylphosphonite and regeneration of the drying agent are also disclosed.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: April 28, 1987
    Assignee: Allied Corporation
    Inventors: William J. Boyle, Jr., Frank Mares, Andrea M. Wallo
  • Selective conversion of acrylonitrile into 1,4-dicyano-1-butene catalyzed by polymer-bound alkyl diarylphosphinites
    Patent number: 4574060
    Abstract: Selective conversion of acrylonitrile into 1,4-dicyano-1-butene by contacting a liquid phase comprising acrylonitrile with an effective amount of a polymer-bound alkyl diarylphosphinite catalyst having the formula I: ##STR1## wherein the trivalent phosphorus is substituted by one alkoxy group and one aryl group and wherein the third bond of phosphorus is a P--C bond to a pendant aryl group of the polymer matrix, such as polystyrene cross-linked with divinylbenzene is disclosed. Treatment of the liquid phase, prior to contacting same with the polymer-bound catalyst, with a drying agent comprising a polymer-bound dialkyl arylphosphonite and regeneration of the drying agent are also disclosed.
    Type: Grant
    Filed: November 3, 1982
    Date of Patent: March 4, 1986
    Assignee: Allied Corporation
    Inventors: William J. Boyle, Jr., Frank Mares, Andrea M. Wallo