Patents by Inventor Randell Wayne Dickey

Randell Wayne Dickey 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).

  • Reactor systems and polymerization processes using multi-zone circulating reactors
    Patent number: 7816447
    Abstract: The invention relates to the production of polymers using polymerization processes and reactor systems including a plurality of multi-zone circulating reactors. In particular, the invention relates to the production of impact copolymers using reactor systems including a plurality of multi-zone circulating reactors.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: October 19, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Kevin Wayne Lawson, Lawrence Carl Smith, Randell Wayne Dickey, Robert Tan Li, Prasadarao Meka
  • Methods for injecting catalyst into a polymerization reactor
    Patent number: 7235614
    Abstract: A polymerization process and a catalyst delivery system are provided. For example, a polymerization process is described, including providing a conduit having a catalyst inlet, a first propylene stream inlet located downstream of the catalyst inlet, and a second propylene stream inlet located downstream of the first propylene stream inlet, the conduit being operably connected to a polymerization vessel, introducing a catalyst to the conduit through the catalyst inlet, and passing the catalyst through the conduit to the polymerization vessel. The process may further include introducing a first propylene stream to the conduit to provide a mixed catalyst stream downstream of the catalyst inlet. The process may additionally include stopping the flow of the catalyst passing through the conduit, introducing a second propylene stream to the conduit through the second propylene stream inlet, removing a section of the conduit, and replacing the removed section of the conduit with a different conduit section.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: June 26, 2007
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lawrence Carl Smith, Randell Wayne Dickey, Robin Lynne Rubish
  • Polymerization processes using antistatic agents
    Patent number: 7205363
    Abstract: The invention relates to a process for the polymerization of olefins using an antistatic agent. In particular, the invention relates to a polymerization process to produce propylene polymers using a supported metallocene catalyst system and an antistatic agent. The antistatic agent may also be contacted with a scavenger prior to polymerization.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: April 17, 2007
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Randell Wayne Dickey, Jennifer Harting Ward, Thomas Craig Wilson
  • Polymerization processes using antistatic agents
    Publication number: 20040254316
    Abstract: The invention relates to a process for the polymerization of olefins using an antistatic agent. In particular, the invention relates to a polymerization process to produce propylene polymers using a supported metallocene catalyst system and an antistatic agent. The antistatic agent may also be contacted with a scavenger prior to polymerization.
    Type: Application
    Filed: April 20, 2004
    Publication date: December 16, 2004
    Inventors: Randell Wayne Dickey, Jennifer Harting Ward, Thomas Craig Wilson
  • Methods for injecting catalyst into a polymerization reactor
    Publication number: 20040072973
    Abstract: A polymerization process and a catalyst delivery system are provided. For example, a polymerization process is described, including providing a conduit having a catalyst inlet, a first propylene stream inlet located downstream of the catalyst inlet, and a second propylene stream inlet located downstream of the first propylene stream inlet, the conduit being operably connected to a polymerization vessel, introducing a catalyst to the conduit through the catalyst inlet, and passing the catalyst through the conduit to the polymerization vessel. The process may further include introducing a first propylene stream to the conduit to provide a mixed catalyst stream downstream of the catalyst inlet. The process may additionally include stopping the flow of the catalyst passing through the conduit, introducing a second propylene stream to the conduit through the second propylene stream inlet, removing a section of the conduit, and replacing the removed section of the conduit with a different conduit section.
    Type: Application
    Filed: September 22, 2003
    Publication date: April 15, 2004
    Inventors: Lawrence Carl Smith, Randell Wayne Dickey, Robin Lynne Rubish