Patents by Inventor Sylvie Razigade-Trousselier

Sylvie Razigade-Trousselier 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 hydroxyalkylation of a carbocyclic aromatic ether
    Patent number: 5811587
    Abstract: The present invention concerns a process for the hydroxyalkylation of a carbocyclic aromatic ether.The invention preferably relates to the preparation of 3-methoxy-4-hydroxybenzyl alcohol by the hydroxymethylation of guaiacol.It also concerns the oxidation of the hydroxyalkylated ethers obtained, in particular the oxidation of 3-methoxy-4-hydroxybenzyl alcohol to 3-methoxy-4-hydroxybenzaldehyde, commonly known as "vanillin".The process for the hydroxyalkylation of a carbocyclic aromatic ether of the invention consists of reacting the aromatic ether with a carbonyl compound in the presence of a catalyst and is characterized in that the hydroxyalkylation reaction is carried out in the presence of an effective quantity of a zeolite.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: September 22, 1998
    Assignee: Rhone-Poulenc Chimie
    Inventors: Claude Moreau, Sylvie Razigade-Trousselier, Annie Finiels, Francois Fajula, Laurent Gilbert