Patents by Inventor Frederic Hoffman

Frederic Hoffman 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).

  • Process for degraded-mode regeneration of a catalyst
    Patent number: 6147022
    Abstract: Process for regeneration of a catalytic moving bed in which the catalyst successively passes through at least one combustion zone A, at least one halogenation zone B, and at least one calcination zone C, whereby this process operates in a partial-regeneration-mode, the partially coked catalyst that is obtained from the last combustion zone passes into the halogenation zone in which the amount of halogen and the amount of oxygen are essentially zero--the valves of tubes (19) and (20) are then virtually closed--and the catalyst then passes through the calcination zone in which the amount of oxygen is essentially zero--the valve of tube (11) is then virtually closed.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: November 14, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Francois-Xavier Brunet, Olivier Clause, Frederic Hoffman, Jeremie Esquier