Patents by Inventor Laurent Gilbert

Laurent Gilbert 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 the synthesis of acid halides and reactants useful for its implementation
    Patent number: 5493054
    Abstract: The subject of the present invention is a new catalytic system and a process for the synthesis of acid halides, especially from haloforms. This process for halogenating by means of a haloform is characterized by the use of a metal chloride, advantageously trivalent, as a catalyst, the solubility of which in the reaction mixture is at least equal to one millimole, preferably 1/100 mole per liter, and the metal chloride also being at least half, advantageously two-thirds and preferably three-quarters in the dissolved state.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: February 20, 1996
    Assignee: Rhone-Poulenc Chimie
    Inventors: Gerard Forat, Laurent Gilbert
  • Process for the synthesis of fluorinated derivatives
    Patent number: 5354439
    Abstract: A process for the synthesis of fluorinated organic compounds and a reagent suitable for use in the process. The process is carried out by exchange with fluorides, while preferably agitating the reaction medium with ultrasonic sound.
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: October 11, 1994
    Assignee: Rhone-Poulenc Chimie
    Inventors: Gerard Forat, Laurent Gilbert, Bernard Langlois
  • Process for the hydrogenation of halogenonitro-aromatic compounds in the presence of a sulfur-containing compound
    Patent number: 5126485
    Abstract: A process for the hydrogenation of halogenonitro-aromatic compounds wherein said compounds are contacted with a nickel-, cobalt- or iron-based catalyst, preferably Raney nickel, and hydrogen in the presence of a sulfur-containing compound. Preferably, the sulfur-containing compound is a sulfoxide or sulfone, and the molar ratio of the sulfur-containing compound to the catalyst ranges from about 1:1 to 10:1.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: June 30, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventors: Rosemarie Bailliard, Georges Cordier, Jean-Michel Grosselin, Bernard Langlois, Laurent Gilbert, Gerard Forat
  • Chemical compound containing alkali metals or alkaline earth metals, catalyst containing the compound and process for the production of the catalyst
    Patent number: 5118651
    Abstract: The invention relates to chemical compounds and their use as catalysts in the solvolysis of alkyl halides. The chemical compounds, when dry, have formula (I):(EO.sub.4 M).multidot.(Imp)p (I)wherein E is selected from the group consisting of phosphorus, arsenic, antimony and bismuth, and is preferably phosphorus, and M is a metal or a mixture of metals.Imp corresponds to a basic impregnating compound consisting of alkaline earth metal, or preferably alkali metal, and their mixtures in combination with a counter-anion to ensure electrical neutrality.The coefficient p is between 10.sup.-2 and 1/3.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: June 2, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventors: Michel Gubelmann, Philippe-Jean Tirel, Claude Doussain, Helene Pernot, Laurent Gilbert, Jean-Michel Popa