Patents by Inventor Michel Auroy

Michel Auroy 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 of preparing phthalic anhydride
    Patent number: 4119645
    Abstract: A method for preparing phthalic anhydride by oxidation of o-xylene with air in which the reaction is self-sufficient in terms of energy and involves only low investment costs while providing a pure product in high yield in which the oxidation reaction is carried out in short tubes for minimum pressure drop over the reactor.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: October 10, 1978
    Assignee: Rhone-Progil
    Inventors: Michel Auroy, Maurice Goharel, Jacques Zoulalian
  • Purification of waste water containing phthalic esters
    Patent number: 3933630
    Abstract: A process for the treatment of waste waters from the preparation of phthalic esters of alcohols to reduce the BOD and recover alcohols comprising treating the waste water with a strong acid and then extracting the acidified waste water with an alcohol, preferably the same as the alcohol used to form the phthalic ester.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: January 20, 1976
    Assignee: Rhone-Progil
    Inventors: Jacques Helgorsky, Michel Auroy