Patents by Inventor Francoise Denisard

Francoise Denisard 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 making amino alcohols by electrochemical reduction of nitro alcohols
    Patent number: 4678549
    Abstract: A process for producing amino alcohols by electrosynthesis of nitro alcohols.Reduction of the nitro group is performed in three stages on a cathode made of a material having a strong hydrogen overpotential. During the second stage of reduction, the electronegative potential is higher, and in the last stage the sulfuric solution of amino alcohol obtained is subjected to a purification operation by electro-electrodialysis (EED), followed by an elimination of water.The process is particularly useful for the production of 2-nitro-2-methyl-1-propanol, 2-nitro-2-methyl-1, 3-propanediol, 2-nitro-2-ethyl-1, 3-propanediol, 2-nitro-1-butanol, tris(hydroxymethyl) nitromethane.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: July 7, 1987
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Maurice Rignon, Jean-Claude Catonne, Francoise Denisard, Jean Malafosse