Patents by Inventor Jean C. Daumas

Jean C. Daumas 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).

  • Patent number: 4206148
    Abstract: A process for the dehalogenation of halogen-containing aromatic compounds takes place in the vapor phase, at a temperature of between 280.degree. and 420.degree. C., by the action of hydrogen in the presence of a controlled-action hydrogenation catalyst deposited on an alumina-based support wherein the support used is modified, at least on the surface, by the incorporation of a metal in the form of a salt or an oxide, this incorporation consisting in treating the support with the said metal salt or metal oxide and then carrying out a calcination at a temperature ranging from about 500.degree. to 1,000.degree. C.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: June 3, 1980
    Assignee: Philagro
    Inventors: Georges Biola, Jean Font, Jean C. Daumas
  • Patent number: 4206147
    Abstract: Process for the dehalogenation of halogen-containing aromatic amines takes place by the action of hydrogen in the presence of a controlled-action hydrogenation catalyst, at a temperature of between 280.degree. and 420.degree. C., the active phase of the catalyst containing, in addition to the main catalyst metal, a minor amount of an auxiliary hydrogen catalyst consisting of a second metal which is different from the first.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: June 3, 1980
    Assignee: Philagro
    Inventors: Jean C. Daumas, Robert Tarolle, Georges Biola