Patents by Inventor Roberto G. Presenti

Roberto G. Presenti 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 mitigating fouling and reducing viscosity in primary fractionators and quench sections of ethylene plants
    Patent number: 5985940
    Abstract: A method is disclosed for mitigating fouling and reducing viscosity in primary fractionators and quench sections of ethylene plants by adding to a hydrocarbon stream a mono and/or a polyalkyl-substituted phenol-formaldehyde resin having a weight average molecular weight of from about 1,000 to about 30,000 and at least one alkyl substituent containing from about 4 to about 24 carbon atoms, which alkyl substituent may be linear or branched.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: November 16, 1999
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Maria B. Manek, Chin Hai Chen, Roberto G. Presenti, Hernando Diaz-Arauzo