Patents by Inventor David E. Self

David E. Self 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).

  • Ebullated bed process
    Patent number: 5494570
    Abstract: An improvement has been discovered in an ebullated bed process. A residual hydrocarbon oil feedstock is hydrocracked to yield a product oil. The amount of sediment in the product oil is controlled by adjusting hydrogen partial pressure according to an algorithm. A change in temperature and residence time is avoided.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: February 27, 1996
    Assignee: Texaco Inc.
    Inventors: Govanon Nongbri, Gerald V. Nelson, David E. Self, Glenn A. Clausen
  • Reduction of SO.sub.x in regenerator off gas of a fluid cracking unit
    Patent number: 5028310
    Abstract: SO.sub.x in regenerator off gas in a fluid cracking unit is decreased by providing in the regenerator bed, a metal grid bearing a layer of rare earth oxide.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: July 2, 1991
    Assignee: Texaco Inc.
    Inventors: Roy E. Pratt, David E. Self, Joseph C. Demeter
  • Fluid catalytic cracking of vacuum residuum oil
    Patent number: 4624771
    Abstract: A mixture of hydrocarbons consisting of gas oil and residual oil is catalytically cracked in the presence of a fluidized zeolite catalyst. The mixture of hydrocarbons is classified by boiling range as a 550.degree.-1000.degree. F. gas oil and a 1000+.degree. F. vacuum residuum. The gas oil is selectively cracked using a freshly regenerated fluid zeolite catalyst having less than 0.1 wt % residual carbon to give a high yield of desirable liquid hydrocarbon boiling from about 60.degree.-670.degree. F. The vacuum residuum is injected into the riser reactor at a point near the riser outlet to quench the cracking reactions in the gas oil. The vacuum residuum undergoes a small amount of reaction removing undesirable materials and yielding a liquid hydrocarbon boiling up to about 1000.degree. F. The amount of vacuum residuum cracking and overall yield of liquid hydrocarbons are controlled by downstream injection of vacuum residuum into the riser.
    Type: Grant
    Filed: September 18, 1985
    Date of Patent: November 25, 1986
    Assignee: Texaco Inc.
    Inventors: Philip A. Lane, Charles H. Schrader, Glenn A. Clausen, David E. Self