Patents by Inventor Lee E. Walko

Lee E. Walko 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).

  • Process for vinyl chloride manufacture from ethane and ethylene with partial CHl recovery from reactor effluent
    Patent number: 6933417
    Abstract: A process for producing vinyl chloride monomer from ethylene and ethane having input of significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is only partially recovered from the reactor effluent in the first unit operation after the ethane/ethylene-to-vinyl reaction step or stage. Steps are presented of oxydehydro-chlorination catalytic reaction of ethane, ethylene, hydrogen chloride, oxygen, and chlorine; cooling and condensing the reactor effluent stream; and separating the condensed raw product stream into vinyl chloride monomer and a reactor recycle stream.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: August 23, 2005
    Assignee: Dow Global Technologies Inc.
    Inventors: John P. Henley, Mark E. Jones, Daniel A. Hickman, Kenric A. Marshall, Daniel J. Reed, William D. Clarke, Michael M. Olken, Lee E. Walko
  • Process for vinyl chloride manufacture from ethane and ethylene with immediate HCl recovery from reactor effluent
    Patent number: 6797845
    Abstract: A process for producing vinyl chloride monomer where significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is essentially fully recovered from the reactor effluent in the first unit operation after the ethane/ethylene-to-vinyl reaction step or stage. Steps are presented of oxydehydro-chlorination catalytic reaction of ethane, ethylene, hydrogen chloride, oxygen, and chlorine; quenching the reactor effluent stream to provide a raw product stream having essentially no hydrogen chloride; and separation of the raw product stream into a vinyl chloride monomer product stream and into a lights stream; and recycling the lights steam to the reactor.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: September 28, 2004
    Assignee: Dow Global Technologies Inc.
    Inventors: Daniel A. Hickman, John P. Henley, Mark E. Jones, Kenric A. Marshall, Daniel J. Reed, William D. Clarke, Michael M. Olken, Lee E. Walko
  • Vent collar for plastic lined pipe
    Patent number: 5149142
    Abstract: In a lined pipe, permeated gases trapped between the liner and the outer casing are vented by a collar received between the liner flange and the pipe flange which defines at least one predetermined channel through which the gases may exit.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: September 22, 1992
    Assignee: The Dow Chemical Company
    Inventors: Lee E. Walko, Rodney G. Grusecki
  • Process for converting polymer solutions into granules
    Patent number: 4568418
    Abstract: Thermoplastic polymer solutions in organic solvents are converted to granules of relatively uniform sizes and a narrow distribution range by passing the polymer solution through a jet nozzle to form a high velocity stream, injecting super heated steam into the high velocity stream to form a suspension of fine polymer particulates in a gas stream, passing the particulates into a heated agglomeration tube having a series of adjoining circular turns of at least 180.degree. wherein the particulates are substantially completely agglomerated into granules and the granules are recovered from the gas stream.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: February 4, 1986
    Assignee: The Dow Chemical Company
    Inventors: Lee E. Walko, Stephen B. Wallace, Norman Swanson, Roy M. Cook