Patents by Inventor Patrice Herrenschmidt

Patrice Herrenschmidt 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: 5512166
    Abstract: A process for the simultaneous replacement of a first catalyst by a second catalyst which first catalyst is circulating as a moving bed of solid particles in a hydrocarbon treating unit, which unit comprises at least one processing reactor. The first catalyst is withdrawn downstream of the reactor, or of each reactor, in the direction of catalyst circulation. The second catalyst is simultaneously injected upstream of the reactor or of each reactor. The bulk density of the material withdrawn downstream of the reactor, or of each reactor, is measured continuously. The withdrawal of the first catalyst and the injection of the second catalyst into the reactor concerned are interrupted when the bulk density so measured is equal to that of the second catalyst.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: April 30, 1996
    Assignee: Total Raffinage Distribution, S.A.
    Inventors: Patrice Herrenschmidt, Fran.cedilla.ois-Xavier Cormerais, Thierry Patureaux
  • Patent number: 5154857
    Abstract: The invention relates to a water-soluble demulsifying and antifouling agent capable of separating possibly emulsified water/hydrocarbon mixtures, and particularly water/crude petroleum mixtures containing suspended matter.Said agent comprises from 10 to 60 percent by weight of a combination of the following compounds:at least one quaternary tetraalkylammonium halide; andat least one polyalkyloxylated alkylenediamine or its sulfate.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: October 13, 1992
    Assignee: Compagnie de Raffinage et de Distribution Total France
    Inventors: Marc Durrieu, Patrice Herrenschmidt, Claude Marty