Patents by Inventor Keith D. Alexander

Keith D. Alexander 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 reducing fouling of coker furnaces
    Patent number: 7922896
    Abstract: A method for reducing furnace fouling in a delayed coking process comprising (a) supplying at least one feed to a delayed coking unit comprised of coker furnace, at least two coke drums and a coker fractionator, (b) increasing the aromaticity of the feed to produce a modified stream by combining with the feed upstream of the coker furnace at least one added stream selected from the group consisting of an aromatic gas oil, a hydrotreated aromatic gas oil and combinations thereof, (c) introducing the modified feed stream into the coker furnace, d) heating the modified feed stream to a coking temperature in the coker furnace to produce a heated modified stream, and e) transferring the heated modified stream from the coker furnace to a coke drum.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: April 12, 2011
    Assignee: ConocoPhillips Company
    Inventors: Bruce A. Newman, Keith D. Alexander, Gary C. Hughes, James R. Roth
  • Method for Reducing Fouling of Coker Furnaces
    Publication number: 20090266742
    Abstract: A method for reducing furnace fouling in a delayed coking process comprising (a) supplying at least one feed to a delayed coking unit comprised of coker furnace, at least two coke drums and a coker fractionator, (b) increasing the aromaticity of the feed to produce a modified stream by combining with the feed upstream of the coker furnace at least one added stream selected from the group consisting of an aromatic gas oil, a hydrotreated aromatic gas oil and combinations thereof, (c) introducing the modified feed stream into the coker furnace, d) heating the modified feed stream to a coking temperature in the coker furnace to produce a heated modified stream, and e) transferring the heated modified stream from the coker furnace to a coke drum.
    Type: Application
    Filed: April 28, 2008
    Publication date: October 29, 2009
    Applicant: ConocoPhillips Company
    Inventors: Bruce A. Newman, Keith D. Alexander, Gary C. Hughes, James R. Roth