Patents by Inventor Bong H. Chang

Bong H. Chang 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).

  • Fluid coking with improved stripping
    Patent number: 4587010
    Abstract: A fluid coking process is provided in which the fluidizing and stripping gas is introduced as a plurality of streams in the proximity of flow deflecting means positioned in the stripping portion of the coking reactor such as to provide a specified superficial gas velocity in the stripping portion.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: May 6, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Don E. Blaser, Bong H. Chang, Charles L. Baker
  • Coking with solvent separation of recycle oil using coker naphtha
    Patent number: 4530755
    Abstract: A coking process is provided in which a stream of heavy oil product, which typically is recycled to the coking zone, is first subjected to solvent separation using coker naphtha as solvent to separate the heavy oil into a high Conradson carbon content product comprising a minor portion of the coker naphtha and a lower Conradson carbon content product comprising a major portion of the coker naphtha and, thereafter, recovering the lower Conradson carbon content product and recycling the high Conradson content product, including the minor portion of coker naphtha, to the coking zone.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: July 23, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Joseph M. Ritchie, Bong H. Chang, John Sosnowski
  • Coking with solvent separation of recycle oil using coker naphtha and solvent recovery
    Patent number: 4528088
    Abstract: A coking process is provided in which a stream of heavy oil product, which typically is recycled to the coking zone, is first subjected to solvent separation using coker naphtha as solvent to separate the heavy oil into a high Conradson carbon content product comprising a minor portion of the coker naphtha and a lower Conradson carbon content product comprising a major portion of the coker naphtha and, thereafter, recycling the high Conradson content product, including the minor portion of coker naphtha, to the coking zone, and separating the lower Conradson carbon content product in the coker product fractionator.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: July 9, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Bong H. Chang, Joseph M. Ritchie
  • Combination hydrorefining, heat-treating and hydrocracking process
    Patent number: 4366047
    Abstract: A process for upgrading a heavy hydrocarbonaceous oil is provided in which the oil is hydrorefined, heat-treated and hydrocracked to increase the selectivity of the hydrocracked product to components boiling in the range of 350.degree. to 675.degree. F.
    Type: Grant
    Filed: June 2, 1981
    Date of Patent: December 28, 1982
    Assignee: Exxon Research and Engineering Co.
    Inventors: William E. Winter, Bong H. Chang
  • Thermal cracking of gas oil to middle distillate
    Patent number: 4178228
    Abstract: A mild thermal cracking of gas oil in the presence of added olefinic naphtha increases the yield of middle distillate.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: December 11, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventor: Bong H. Chang