Patents by Inventor Hubert Passedroit

Hubert Passedroit 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 preparing sulphonic acids and sulphonates
    Patent number: 4178307
    Abstract: A process for separating sulphonic acids from a paraffin sulphonic acid solution containing in addition to the paraffin sulphonic acids, sulphonic acid, water and optionally non-sulphonated paraffins by mixing the solution with a slightly polar solvent having solubility in water of less than 7 percent to form an aqueous phase and an organic phase, separating the phases, neutralizing the organic phase and recovering the paraffin sulphonic acids from the neutralized organic phase.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: December 11, 1979
    Assignee: Ato Chimie
    Inventors: Aristide Boy, Henri Galy, Raoul Ivaldi, Hubert Passedroit
  • Process for preparing sulphonic acids and sulphonates
    Patent number: 4177208
    Abstract: A process for separating sulphonic acids from a paraffin sulphonic acid solution containing in addition to the paraffin sulphonic acids, sulphonic acid, water and optionally non-sulphonated paraffins by mixing the solution with a slightly polar alcohol having solubility in water of less than 7 percent to form an aqueous phase and an organic phase, separating the phases, neutralizing the organic phase and recovering the paraffin sulphonic acids from the neutralized organic phase.
    Type: Grant
    Filed: April 12, 1978
    Date of Patent: December 4, 1979
    Assignee: ATO Chemie
    Inventors: Aristide Boy, Henri Galy, Raoul Ivaldi, Hubert Passedroit
  • Method and device for preparing sulphonic acids derived from paraffinic hydrocarbons
    Patent number: 4000049
    Abstract: The instant invention relates to a method for preparing paraffin-sulphonic acids by photochemical sulphoxidation of paraffinic hydrocarbons. The invention also relates to a device for carrying out this method.The invention relates more particlarly to a method for continuously preparing paraffin-sulphonic acids by photochemical sulphoxidation of paraffinic hydrocarbons comprising the steps of reacting a gaseous mixture of sulphurous acid anhydride and oxygen with a liquid paraffiaic phase and injecting at least a portion of said gaseous mixture into said liquid phase in the form of a finely divided dispersion in a recycling fraction of said paraffinic phase which carries said gaseous mixture.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: December 28, 1976
    Assignee: Societe Anonyme dite: Ato Chimie
    Inventors: Aristide Boy, Hubert Passedroit