Patents by Inventor George Melfi

George Melfi 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 for maintaining heat balance in a fluidized bed catalytic cracking unit
    Patent number: 6558531
    Abstract: The invention relates to a process for maintaining heat balance in a fluidized bed catalytic cracking unit. More specifically, the invention relates to a combustion control method capable of maintaining or restoring heat balance by conducting, under appropriate conditions, fuel and an oxygen-containing gas to a transfer line. The transfer line conducts effluent including spent catalyst and combustion products to the unit's catalyst regeneration zone.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: May 6, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Todd R. Steffens, Paul K. Ladwig, George Melfi, John E. Asplin
  • Method for maintaining heat balance in a fluidized bed catalytic cracking unit
    Publication number: 20010025806
    Abstract: The invention relates to a process for maintaining heat balance in a fluidized bed catalytic cracking unit. More specifically, the invention relates to a combustion control method capable of maintaining or restoring heat balance by conducting, under appropriate conditions, fuel and an oxygen-containing gas to a transfer line. The transfer line conducts effluent including spent catalyst and combustion products to the unit's catalyst regeneration zone.
    Type: Application
    Filed: March 13, 2001
    Publication date: October 4, 2001
    Inventors: Todd R. Steffens, Paul K. Ladwig, George Melfi, John E. Asplin
  • Improved method for transferring entrained solids to a cyclone
    Patent number: 5275641
    Abstract: Accordingly, the present invention, in one embodiment, encompasses an apparatus for the fluidized catalytic cracking of a hydrocarbon feed comprising: a riser which is generally vertically positioned within a catalyst disengaging zone and which has a plurality of openings around the circumference of the riser at its discharge end. The openings in the riser have a vertical stub portion that extends tangentially outwardly from the riser and communicates with a first end of an upwardly sloping curvilinear tunnel that terminates at a second end. The second end of the tunnel opens into a tangential opening in the primary cyclone. The area of the opening of the first end of the tunnel is larger than the area of the opening of the second end of the tunnel.
    Type: Grant
    Filed: August 26, 1992
    Date of Patent: January 4, 1994
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert F. Tammera, Donald F. Shaw, Kenneth J. Reinman, George Melfi
  • Tangential solids separation transfer tunnel
    Patent number: 5190650
    Abstract: Accordingly, the present invention, in one embodiment, encompasses an apparatus for the fluidized catalytic cracking of a hydrocarbon feed comprising: a riser which is generally vertically positioned within a catalyst disengaging zone and which has a plurality of openings around the circumference of the riser at its discharge end. The openings in the riser have a vertical stub portion that extends tangentially outwardly from the riser and communicates with a first end of an upwardly sloping curvilinear tunnel that terminates at a second end. The second end of the tunnel opens into a tangential opening in the primary cyclone. The area of the opening of the first end of the tunnel is larger than the area of the opening of the second end of the tunnel.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: March 2, 1993
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert F. Tammera, Donald F. Shaw, Kenneth J. Reinman, George Melfi