Patents by Inventor Dennis C. Kowalczyk

Dennis C. Kowalczyk 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).

  • FCC metals passivation additives applied to catalyst
    Patent number: 5972208
    Abstract: A process and apparatus for incorporating additives into a circulating inventory of equilibrium catalyst in a fluid catalyst cracking (FCC) unit are disclosed. Hot regenerated catalyst is removed from the FCC regenerator, cooled, optionally subjected to magnetic catalyst separation, and at least a portion of the cooled catalyst is contacted with a solution of an additive material without forming a separated liquid phase. Additive treated catalyst is recycled to the FCC unit, preferably directly into the regenerator.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: October 26, 1999
    Assignee: The M. W. Kellogg Company
    Inventors: Terry L. Goolsby, Dennis C. Kowalczyk, Howard F. Moore
  • Method for selective alteration of fluid catalytic cracker yield structures
    Patent number: 4997545
    Abstract: A method for selective alteration of yield structures in fluid catalytic cracking units toward more middle distillate (light catalytic gas oil) and less light distillate (gasoline) by the addition of basic nitrogen compounds.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: March 5, 1991
    Assignee: Chevron Research Company
    Inventors: Ashok S. Krishna, Dennis C. Kowalczyk
  • Process for removing polymer-forming impurities from naphtha fraction
    Patent number: 4422927
    Abstract: Polymer precursor materials are vaporized without polymerization or are removed from a raw naphtha fraction by passing the raw naphtha to a vaporization zone (24) and vaporizing the naphtha in the presence of a wash oil while stripping with hot hydrogen to prevent polymer deposits in the equipment.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: December 27, 1983
    Assignee: The Pittsburg & Midway Coal Mining Co.
    Inventors: Dennis C. Kowalczyk, Bruce A. Bricklemyer, Joseph J. Svoboda