Patents by Inventor Theodore D. Duncan

Theodore D. Duncan 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).

  • Systems and methods for recovering hydrocarbons from a polyolefin purge gas product
    Patent number: 9181361
    Abstract: Provided are systems and methods for separating a purge gas recovered from a polyethylene product. The method includes recovering a polyethylene product containing one or more volatile hydrocarbons from a polymerization reactor and contacting the polyethylene product with a purge gas to remove at least a portion of the volatile hydrocarbons to produce a polymer product having a reduced concentration of volatile hydrocarbons and a purge gas product enriched in volatile hydrocarbons. The purge gas product is compressed to a pressure of 2,500 kPaa to 10,000 kPaa, and is then cooled and separated into at least a first product, a second product, and a third product. A portion of one or more of the first, second, or third products is then recycled as a purge gas, to the polymerization reactor, or to the purge gas product enriched in volatile hydrocarbons prior to compression, respectively.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: November 10, 2015
    Assignee: Univation Technologies, LLC
    Inventors: Mark W. Blood, Randall L. Force, Theodore D. Duncan, George W. Schwarz, Jr., Daniel W. Mosser, Donald A. Fischer, Robert D. Olson, James Leland Swecker, II, Cloid Russell Smith, III
  • Systems and Methods for Recovering Hydrocarbons From a Polyolefin Purge Gas Product
    Publication number: 20130291720
    Abstract: Provided are systems and methods for separating a purge gas recovered from a polyethylene product. The method includes recovering a polyethylene product containing one or more volatile hydrocarbons from a polymerization reactor and contacting the polyethylene product with a purge gas to remove at least a portion of the volatile hydrocarbons to produce a polymer product having a reduced concentration of volatile hydrocarbons and a purge gas product enriched in volatile hydrocarbons. The purge gas product is compressed to a pressure of 2,500 kPaa to 10,000 kPaa, and is then cooled and separated into at least a first product, a second product, and a third product. A portion of one or more of the first, second, or third products is then recycled as a purge gas, to the polymerization reactor, or to the purge gas product enriched in volatile hydrocarbons prior to compression, respectively.
    Type: Application
    Filed: December 13, 2011
    Publication date: November 7, 2013
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventors: Mark W. Blood, Randall L. Force, Theodore D. Duncan, George W. Schwarz, JR., Daniel W. Mosser, Donald A. Fischer, Robert D. Olson, James Leland Swecker, II, Cloid Russell Smith, III