Patents by Inventor Rodolphe De Sousa

Rodolphe De Sousa 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 dithiocarbamates in particular from polyols of the glycerol type
    Patent number: 8772526
    Abstract: The present invention concerns a method for the synthesis of glycerol dithiocarbamates or bis-dithiocarbamates (GDTCs) in which a reaction medium comprising (1) a carbonate selected from diethyl carbonate, dimethyl carbonate and ethylene or propylene carbonate associated with a glycerol type polyol in the presence of a basic catalyst or (2) a cyclic carbonate comprising five ring members, in a solvent medium, is supplemented with a primary or secondary amine in the presence of carbon disulphide, and the GDTC formed is recovered. In particular, a glycerol type polyol is brought into the presence of diethyl carbonate in the presence of a catalyst, then a primary or secondary amine is added to the reaction medium in the presence of carbon disulphide, and the GDTC formed is recovered. The invention can be used for one-step synthesis of glycerol dithiocarbamates directly from glycerol as the starting material and solvent.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: July 8, 2014
    Assignees: Centre National de la Recherche Scientifique, Universite de Poitiers
    Inventors: Francois Jerome, Rodolphe De Sousa, Joel Barrault, Yannick Pouilloux
  • METHOD FOR PREPARING DITHIOCARBAMATES IN PARTICULAR FROM POLYOLS OF THE GLYCEROL TYPE
    Publication number: 20120264941
    Abstract: The present invention concerns a method for the synthesis of glycerol dithiocarbamates or bis-dithiocarbamates (GDTCs) in which a reaction medium comprising (1) a carbonate selected from diethyl carbonate, dimethyl carbonate and ethylene or propylene carbonate associated with a glycerol type polyol in the presence of a basic catalyst or (2) a cyclic carbonate comprising five ring members, in a solvent medium, is supplemented with a primary or secondary amine in the presence of carbon disulphide, and the GDTC formed is recovered. In particular, a glycerol type polyol is brought into the presence of diethyl carbonate in the presence of a catalyst, then a primary or secondary amine is added to the reaction medium in the presence of carbon disulphide, and the GDTC formed is recovered. The invention can be used for one-step synthesis of glycerol dithiocarbamates directly from glycerol as the starting material and solvent.
    Type: Application
    Filed: December 21, 2010
    Publication date: October 18, 2012
    Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Francois Jerome, Rodolphe De Sousa, Joel Barrault, Yannick Pouilloux