Patents by Inventor Gilbert Marin

Gilbert Marin 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: 6563001
    Abstract: The present invention relates to an improved process for processing the reaction mixture from the direct oxidation of hydrocarbon into carboxylic acid, using molecular oxygen or a gas containing it, in the liquid phase, in a solvent and in the presence of a catalyst dissolved in the reaction medium, characterized in that the said process comprises: when the composition of the reaction mixture allows it, a decantation into two liquid phases: a nonpolar upper phase and a polar lower phase; a distillation of the said lower phase or, where appropriate, of all of the reaction mixture, thus separating, on the one hand, a distillate and, on the other hand, the distillation residue comprising the acids formed, the catalyst, the heavy compounds, at least some of the solvent and, if any, the reaction intermediates and side products; a purification treatment by oxidation, using molecular oxygen or a gas containing it or using oxygen donors, of the distillation residue obtained above, a distillation of the reaction s
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: May 13, 2003
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Michel Costantini, Eric Fache, Gilbert Marin
  • Patent number: 5900506
    Abstract: The present invention relates to a method of processing reaction mixtures obtained from the oxidation reaction of cyclohexane to adipic acid. The processing of the reaction mixture obtained from the direct oxidation of cyclohexane to adipic acid with oxygen, in an organic solvent and in the presence of a catalyst, comprises:(a) a distillation which makes it possible to separate out, on the one hand, a distillate comprising at least some of the most volatile compounds such as the unconverted cyclohexane, the organic solvent, cyclohexanone, cyclohexanol, cyclohexyl esters, lactones and water, and, on the other hand, the distillation residue comprising the diacids formed and the catalyst;(b) the addition of water to the distillation residue in order to form an aqueous solution;(c) crystallization of the adipic acid from the aqueous solution of the distillation residue.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: May 4, 1999
    Assignee: R.P. Fiber & Resin Intermediates
    Inventors: Eric Fache, Philippe LeConte, Gilbert Marin
  • Patent number: 4038371
    Abstract: Trichlorosilane is dismutated to dichlorosilane in the presence, as catalyst, of a tetraalkylurea.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: July 26, 1977
    Assignee: Rhone-Poulenc Industries
    Inventor: Gilbert Marin
  • Patent number: 4018871
    Abstract: Trichlorosilane is dismutated into dichlorosilane in the presence of an .alpha.-pyrrolidone which is N-substituted by a hydrocarbon radical as catalyst.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: April 19, 1977
    Assignee: Rhone-Poulenc Industries
    Inventors: Gilbert Marin, Marcel Lefort
  • Patent number: 3980686
    Abstract: Dichlorosilane and phenyltrichlorosilane are prepared in good yields by reacting trichlorosilane and diphenyldichlorosilane in the presence of aluminium chloride, as catalyst, and a small proportion of a co-catalyst which is selected from hydrochloric acid and alumina and mixtures thereof, isolating the dichlorosilane from the reaction medium as it is formed and isolating the phenyltrichlorosilane obtained at the end of the reaction.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: September 14, 1976
    Assignee: Rhone-Poulenc Industries
    Inventors: Marcel Lefort, Gilbert Marin