Patents by Inventor Steven P. Haynie

Steven P. Haynie 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).

  • Reducing accumulation of C6+ hydrocarbon components in polyolefin gas-phase reactors
    Patent number: 11820841
    Abstract: A polymerization process may include: polymerizing a monomer having 4 or less carbons and a comonomer having 6 or more carbons in the presence of an inert isomer/saturate of the comonomer to yield a product stream comprising a polymer, unreacted monomer, unreacted comonomer, and the inert isomer/saturate of the comonomer; separating the product stream into (a) a polymer stream and (b) an unreacted components stream; and separating the unreacted components stream in a distillation column into (a) an overhead stream comprising the unreacted monomer and (b) a bottoms stream comprising the comonomer and the inert isomer/saturate of the comonomer, wherein a concentration of C5? hydrocarbons in the overhead stream is higher than a concentration of the C5? hydrocarbons in the unreacted components stream, and wherein a concentration of C6+ hydrocarbons in the bottoms stream is higher than a concentration of the C6+ hydrocarbons in the unreacted components stream.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: November 21, 2023
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Steven P. Haynie, Giyarpuram N. Prasad, Diwaker Singh, Gautam Swamynathan, Stacy N. Apugo
  • Reducing Accumulation of C6+ Hydrocarbon Components In Polyolefin Gas-Phase Reactors
    Publication number: 20200255564
    Abstract: A polymerization process may include: polymerizing a monomer having 4 or less carbons and a comonomer having 6 or more carbons in the presence of an inert isomer/saturate of the comonomer to yield a product stream comprising a polymer, unreacted monomer, unreacted comonomer, and the inert isomer/saturate of the comonomer; separating the product stream into (a) a polymer stream and (b) an unreacted components stream; and separating the unreacted components stream in a distillation column into (a) an overhead stream comprising the unreacted monomer and (b) a bottoms stream comprising the comonomer and the inert isomer/saturate of the comonomer, wherein a concentration of C5? hydrocarbons in the overhead stream is higher than a concentration of the C5? hydrocarbons in the unreacted components stream, and wherein a concentration of C6+ hydrocarbons in the bottoms stream is higher than a concentration of the C6+ hydrocarbons in the unreacted components stream.
    Type: Application
    Filed: May 1, 2020
    Publication date: August 13, 2020
    Inventors: Steven P. Haynie, Giyarpuram N. Prasad, Diwaker Singh, Gautam Swamynathan, Stacy N. Apugo
  • Recovery of unreacted monomers from olefin polymerization processes
    Patent number: 10526428
    Abstract: A process, for recovery of unreacted olefin monomer(s) from a particulate product of an olefin polymerization reactor, the particulate polymer product is supplied to a degassing vessel, where the particulate product is countercurrently contacted with at least a first gaseous stripping stream, which includes at least 5% by weight unreacted olefin monomer, and then with an inert gas stream under conditions effective to strip hydrocarbon impurities from the polymer product and produce a stripped polymer product, is provided.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: January 7, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Steven P. Haynie
  • Recovery of Unreacted Monomers from Olefin Polymerization Processes
    Publication number: 20180162962
    Abstract: A process, for recovery of unreacted olefin monomer(s) from a particulate product of an olefin polymerization reactor, the particulate polymer product is supplied to a degassing vessel, where the particulate product is countercurrently contacted with at least a first gaseous stripping stream, which includes at least 5% by weight unreacted olefin monomer, and then with an inert gas stream under conditions effective to strip hydrocarbon impurities from the polymer product and produce a stripped polymer product, is provided.
    Type: Application
    Filed: June 17, 2016
    Publication date: June 14, 2018
    Inventor: Steven P. Haynie
  • Monomer concentration prediction and control in a polymerization process
    Patent number: 7786227
    Abstract: A method for the control of a polymerization process, which method employs the combination of a densitometer measurement of the polymerization reaction mixture and a quadratic computer model.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: August 31, 2010
    Assignee: Equistar Chemicals, LP
    Inventors: Alberto Buchelli, Steven P. Haynie, Bruce A. Wicker, Jr.
  • Monomer concentration prediction and control in a polymerization process
    Publication number: 20090043054
    Abstract: A method for the control of a polymerization process, which method employs the combination of a densitometer measurement of the polymerization reaction mixture and a quadratic computer model.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 12, 2009
    Inventors: Alberto Buchelli, Steven P. Haynie, Bruce A. Wicker, JR.