Patents by Inventor Lise Layeillon

Lise Layeillon 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).

  • Method for preparing acetic acid and or methyl acetate in the presence of iridium and platinum
    Patent number: 6916952
    Abstract: The invention relates to a process for the preparation of acetic acid and/or methyl acetate in the liquid phase by the carbonylation of methanol and/or the isomerization of methyl formate in the presence of water, a solvent, a homogeneous catalyst system comprising iridium and a halogen-containing promoter, and carbon monoxide, wherein said catalyst system also comprises platinum.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: July 12, 2005
    Assignee: Acetex Chimie
    Inventors: Carole Le Berre, Philippe Kalck, Philippe Serp, Lise Layeillon, Daniel Thiebaut
  • Process for improving the stability and/or preventing the deactivation of the catalyst during the manufacture of acetic acid and/or of methyl acetate
    Patent number: 6774083
    Abstract: A process for improving the stability and/or preventing the deactivation of catalyst in processes of continuous manufacture of acetic acid and/or methyl acetate includes a first, reaction step wherein at least one methyl formate isomerization reaction is carried out in a liquid phase reaction medium, in the presence of carbon monoxide and of a catalytic system including at least one halogenated promoter and at least one iridium-based catalytic compound, and, a second, flash step in which partial vaporization of a reaction medium originating from the first step is carried out in a flash separator. In a non-vaporized liquid fraction resulting from the partial vaporization in the flash separator, an overall content of formic acid and methyl formate is maintained at least equal to 1% by weight of said non-vaporized liquid fraction.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: August 10, 2004
    Assignee: Acetex Chimie
    Inventors: Daniel Thiebaut, Carl Patois, Lise Layeillon, Daniel Marchand
  • Process for improving the stability and/or preventing the deactivation of the catalyst during the manufacture of acetic acid and/or of methyl acetate
    Patent number: 6617472
    Abstract: The present invention relates to process for improving the stability and/or preventing the deactivation of the catalyst in processes of manufacture of acetic acid and/or of methyl acetate according to which processes, in a first step, referred to as the reaction step, at least one methyl formate isomerization reaction is carried out in liquid phase, in the presence of carbon monoxide and of a catalytic system comprising at least one halogenated promoter and at least one iridium-based catalytic compound, and, in a second step, referred to as the flash step, the partial vaporization of the reaction medium originating from the first step is carried out in a separator referred to as the flash separator, characterized in that it consists in maintaining an overall content of formic acid and of methyl formate at least equal to 1% by weight of said liquid fraction, preferably between 1 and 50%, preferably between 1 and 30%, by weight with respect to said liquid fraction, in the non-vaporized liquid fraction originati
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: September 9, 2003
    Assignee: Acetex Chimie
    Inventors: Daniel Thiebaut, Carl Patois, Lise Layeillon, Daniel Marchand