Patents by Inventor Larry H. Nemec

Larry H. Nemec 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).

  • Integrated dimerization process
    Patent number: 6756514
    Abstract: A process for dimerizing vinyl olefins that is fully integrated into a process for making vinyl olefins is disclosed.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: June 29, 2004
    Assignee: BP Corporation North America Inc.
    Inventors: George Barac, Larry L. Bendig, William L. Cox, Larry H. Nemec
  • INTEGRATED DIMERIZATION PROCESS
    Publication number: 20040110999
    Abstract: A process for dimerizing vinyl olefins that is fully integrated into a process for making vinyl olefins is disclosed.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 10, 2004
    Inventors: George Barac, Larry L. Bendig, William L. Cox, Larry H. Nemec
  • Process for selective utilization of alpha-olefins in mixtures containing non-alpha-olefins
    Patent number: 5877378
    Abstract: The alpha-olefin content of mixed hydrocarbon streams is selectively utilized to produce trialkylaluminum compounds in which the alkyl groups are linear primary alkyl groups. This selective utilization is accomplished by use of a specific, highly selective low residence-time, low isomerization catalytic displacement reaction. In addition, when alpha-olefins are the desired end product, a second low residence-time catalytic displacement reaction is utilized whereby high purity alpha olefins are produced.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: March 2, 1999
    Assignee: Amoco Corporation
    Inventors: Andrew D. Overstreet, Robert H. Allen, Larry H. Nemec, Ronny W. Lin
  • Aluminum alkyls and linear 1-olefins from internal olefins
    Patent number: 5144053
    Abstract: Linear 1-olefins are prepared from internal olefins by (i) reacting them in the presence of an isomerization catalyst and a tri-lower alkyl aluminum so as to cause internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, and, thereafter, (ii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: September 1, 1992
    Assignee: Ethyl Corporation
    Inventors: Robert H. Allen, Keith G. Anderson, Steven P. Diefenbach, Ronny W. Lin, Larry H. Nemec, Andrew D. Overstreet, Gene C. Robinson
  • Aluminum alkyls and linear 1-olefins from internal olefins
    Patent number: 5124465
    Abstract: Linear 1-olefins are prepared from internal olefins by (i) reacting them in the presence of an isomerization catalyst and a tri-lower alkyl aluminum so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, and, thereafter, (ii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: June 23, 1992
    Assignee: Ethyl Corporation
    Inventors: Robert H. Allen, Keith G. Anderson, Steven P. Diefenbach, Ronny W. Lin, Larry H. Nemec, Andrew D. Overstreet, Gene C. Robinson