Patents by Inventor Benjamin C. Duff

Benjamin C. Duff 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 online cleaning of heater exchangers
    Patent number: 11092395
    Abstract: Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: August 17, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Brian R. Greenhalgh, Ronnie D. Bryant, Allison C. Buenemann, Benjamin C. Duff, Philip M. Duvall, Joseph A. Moebus
  • Method of Online Cleaning of Heater Exchangers
    Publication number: 20200370849
    Abstract: Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.
    Type: Application
    Filed: October 17, 2018
    Publication date: November 26, 2020
    Inventors: Brian R. Greenhalgh, Ronnie D. Bryant, Allison C. Buenemann, Benjamin C. Duff, Philip M. Duvall, Joseph A. Moebus