Patents Represented by Attorney E. O. Palalvo

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  • Arylamine processes
    Patent number: 5723669
    Abstract: A process preparation of N,N-bis(3,4-dimethylphenyl)-4-biphenylamine which comprises the reaction of N,N-bis(3,4-dimethylphenyl)amine and an iodobiphenyl in the presence of a ligand copper catalyst, and wherein the ligand is selected from the group consisting of monodentate tertiary amines and bidentate tertiary amines, and which reaction is accomplished at a temperature of from about 120.degree. C. to about 150.degree. C.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: March 3, 1998
    Assignee: Xerox Corporation
    Inventors: H. Bruce Goodbrand, Nan-Xing Hu, Beng S. Ong