Patents by Inventor Pietro Andrigo

Pietro Andrigo 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 production of hydrogen peroxide
    Patent number: 7048905
    Abstract: Process for the production of concentrated aqueous solutions of hydrogen peroxide, comprising the following steps: (a) feeding to a reactor containing a catalyst based on palladium and platinum, heterogeneous and maintained in dispersion in a liquid reaction medium: (i) a liquid stream consisting of an alcohol or a mixture of C1–C3 alcohols or a mixture of said alcohols with water containing at least 50% by weight of alcohol, also containing an acid promoter and a halogenated promoter, the alcohol and optionally all or part of the water contained in the stream being recycled from the subsequent phase d); (ii) a gaseous stream containing hydrogen, oxygen and an inert gas, characterized in that the concentration of the hydrogen is less than 4.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: May 23, 2006
    Assignees: Polimeri Europa S.p.A., ENI S.p.A.
    Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti, Ugo Romano
  • Process for the production of hydrogen peroxide
    Publication number: 20040037769
    Abstract: Process for the production of concentrated aqueous solutions of hydrogen peroxide, comprising the following steps: (a) feeding to a reactor containing a catalyst based on palladium and platinum, heterogeneous and maintained in dispersion in a liquid reaction medium: (i) a liquid stream consisting of an alcohol or a mixture of C1-C3 alcohols or a mixture of said alcohols with water containing at least 50% by weight of alcohol, also containing an acid promoter and a halogenated promoter, the alcohol and optionally all or part of the water contained in the stream being recycled from the subsequent phase d); (ii) a gaseous stream containing hydrogen, oxygen and an inert gas, characterized in that the concentration of the hydrogen is less than 4.
    Type: Application
    Filed: July 10, 2003
    Publication date: February 26, 2004
    Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti, Ugo Romano
  • Process for the continuous production of hydrogen peroxide
    Patent number: 6649140
    Abstract: A process is described for the continuous production of alcoholic or hydro-alcoholic solutions of hydrogen peroxide in a concentration ranging from 2 to 10% by weight and their direct use in oxidation processes. The process operates under high safety conditions and with a high productivity and molar selectivity towards the formation of H2O2.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: November 18, 2003
    Assignees: Eni S.p.A., Enichem S.p.A.
    Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti
  • Process for the continuous production of hydrogen peroxide
    Publication number: 20020025293
    Abstract: A process-is described for the continuous production of alcoholic or hydro-alcoholic solutions of hydrogen peroxide in a concentration ranging from 2 to 10% by weight and their direct use in oxidation processes.
    Type: Application
    Filed: June 1, 2001
    Publication date: February 28, 2002
    Applicant: ENI S.p.A
    Inventors: Giuseppe Paparatto, Franco Rivetti, Pietro Andrigo, Giordano De Alberti