Patents by Inventor Elizabeth L. Stavens

Elizabeth L. Stavens 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).

  • Patent number: 8138384
    Abstract: In a process for converting methane to alkylated aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst under conditions effective to convert said methane to aromatic hydrocarbons and produce a first effluent stream comprising aromatic hydrocarbons and hydrogen. At least a portion of said aromatic hydrocarbon from said first effluent stream is then contacted with an alkylating agent under conditions effective to alkylate said aromatic hydrocarbon and produce an alkylated aromatic hydrocarbon having more alkyl side chains than said aromatic hydrocarbon prior to the alkylating.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: March 20, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Gary D. Mohr, Matthew J. Vincent
  • Patent number: 7977519
    Abstract: In a process for converting methane to higher hydrocarbons including aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert said methane to aromatic hydrocarbons. A first portion of the catalyst is transferred from the reaction zone to a heating zone, where the first catalyst portion is heated by contacting the catalyst with hot combustion gases generated by burning a supplemental source of fuel. The heated first catalyst portion is then returned to the reaction zone.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: July 12, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
  • Patent number: 7968759
    Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is supplied to one or more reaction zone(s) containing catalytic material operating under reaction conditions effective to convert at least a portion of the methane to aromatic hydrocarbons; the reaction zone(s) being operated with an inverse temperature profile.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: June 28, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar, Jeremy J. Patt
  • Publication number: 20110040135
    Abstract: In a process for converting methane to higher hydrocarbons including aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert said methane to aromatic hydrocarbons. A first portion of the catalyst is transferred from the reaction zone to a heating zone, where the first catalyst portion is heated by contacting the catalyst with hot combustion gases generated by burning a supplemental source of fuel. The heated first catalyst portion is then returned to the reaction zone.
    Type: Application
    Filed: February 8, 2010
    Publication date: February 17, 2011
    Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
  • Patent number: 7888543
    Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) comprises providing a hydrocarbon feedstock containing methane and a catalytic particulate material to a reactor system having at least first and second reaction zones connected in series. Each of the reaction zones is operated under reaction conditions sufficient to convert at least a portion of the methane to said higher hydrocarbon(s) and is maintained in a moving bed fashion, with the bulk of the catalytic particulate material being moved from the first reaction zone to the second reaction zone and with the bulk of the hydrocarbon feedstock being moved from the second reaction zone to the first reaction zone.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: February 15, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar
  • Publication number: 20100305374
    Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is supplied to one or more reaction zone(s) containing catalytic material operating under reaction conditions effective to convert at least a portion of the methane to aromatic hydrocarbons; the reaction zone(s) being operated with an inverse temperature profile.
    Type: Application
    Filed: August 5, 2010
    Publication date: December 2, 2010
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar, Jeremy J. Patt
  • Patent number: 7795490
    Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is supplied to one or more reaction zone(s) containing catalytic material operating under reaction conditions effective to convert at least a portion of the methane to aromatic hydrocarbons; the reaction zone(s) being operated with an inverse temperature profile.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: September 14, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar, Jeremy J. Patt
  • Patent number: 7781636
    Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) in a reaction zone comprises providing to a hydrocarbon feedstock containing methane and a catalytic particulate material to the reaction zone and contacting the catalytic particulate material and the hydrocarbon feedstock in a substantially countercurrent fashion in the reaction zone, while operating the reaction zone under reaction conditions sufficient to convert at least a portion of said methane to a first effluent having said higher hydrocarbon(s).
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: August 24, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens, Matthew J. Vincent
  • Patent number: 7772447
    Abstract: In a process for converting methane to liquid hydrocarbons, a feed containing methane is contacted with 0 dehydrocyclization catalyst under conditions effective to convert said methane to aromatic hydrocarbons, including benzene and/or naphthalene, and produce a first effluent stream comprising hydrogen and 0t least 5 wt % m>35 aromatic hydrocarbons than said feed. At least part the aromatic hydrocarbons from the first effluent stream is then reacted with hydrogen to produce a second effluent stream having a reduced benzene and/or naphthalene content compared with said first effluent stream.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: August 10, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Matthew J. Vincent
  • Patent number: 7759535
    Abstract: In a process for converting methane to higher hydrocarbons including aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst under conditions effective to convert said methane to aromatic hydrocarbons and produce a first effluent stream comprising aromatic hydrocarbons and hydrogen, wherein said first effluent stream comprises at least 5 wt % more aromatic hydrocarbons than said feed. At least part of the hydrogen from said first effluent stream is then reacted with an oxygen-containing species, such as carbon dioxide, to produce a second effluent stream having a reduced hydrogen content compared with said first effluent stream.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: July 20, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Xiaobing Feng, Matthew J. Vincent, Elizabeth L. Stavens
  • Patent number: 7728186
    Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions including a first maximum temperature effective to convert the methane to aromatic hydrocarbons and generate coke on the catalyst. A portion of the coked catalyst is transferred from the reaction zone to a separate regeneration zone, where the catalyst portion is contacted with a regeneration gas under conditions including a second maximum temperature less than or equal to the first maximum temperature and effective to at least partially remove coke from the catalyst portion. Before being returned to the reaction zone, the regenerated catalyst portion is contacted with a carburizing gas in a catalyst treatment zone separate from the reaction zone at a third maximum temperature less than the first maximum temperature.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: June 1, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
  • Publication number: 20100099935
    Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) comprises providing a hydrocarbon feedstock containing methane and a catalytic particulate material to a reactor system having at least first and second reaction zones connected in series. Each of the reaction zones is operated under reaction conditions sufficient to convert at least a portion of the methane to said higher hydrocarbon(s) and is maintained in a moving bed fashion, with the bulk of the catalytic particulate material being moved from the first reaction zone to the second reaction zone and with the bulk of the hydrocarbon feedstock being moved from the second reaction zone to the first reaction zone.
    Type: Application
    Filed: December 18, 2009
    Publication date: April 22, 2010
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Sangar Neeraj
  • Patent number: 7683227
    Abstract: In a process for converting methane to higher hydrocarbons including aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions effective to convert said methane to aromatic hydrocarbons. A first portion of the catalyst is transferred from the reaction zone to a heating zone, where the first catalyst portion is heated by contacting the catalyst with hot combustion gases generated by burning a supplemental source of fuel. The heated first catalyst portion is then returned to the reaction zone.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: March 23, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
  • Patent number: 7659437
    Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) comprises providing a hydrocarbon feedstock containing methane and a catalytic particulate material to a reactor system having at least first and second reaction zones connected in series. Each of the reaction zones is operated under reaction conditions sufficient to convert at least a portion of the methane to said higher hydrocarbon(s) and is maintained in a moving bed fashion, with the bulk of the catalytic particulate material being moved from the first reaction zone to the second reaction zone and with the bulk of the hydrocarbon feedstock being moved from the second reaction zone to the first reaction zone.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: February 9, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar
  • Patent number: 7563358
    Abstract: A hydrocarbon conversion process for producing an aromatics product containing of benzene, toluene, xylenes, or mixtures thereof. The process is carried out by converting precursors of benzene, toluene, and xylenes that are contained in a hydrocarbon feed (C6+ non-aromatic cyclic hydrocarbons, A8+ single-ring aromatic hydrocarbons having at least one alkyl group containing two or more carbon atoms; and A9+ single-ring aromatic hydrocarbons having at least three methyl groups) to produce a product that contains an increased amount of benzene, toluene, xylenes, or combinations thereof compared to said hydrocarbon feed.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: July 21, 2009
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Elizabeth L. Stavens, Stephen H. Brown, J. Scott Buchanan, Yun-Feng Chang, Larry L. Iaccino, Paul F. Keusenkothen, John D. Y. Ou, Randall D. Partridge
  • Publication number: 20080051615
    Abstract: A hydrocarbon conversion process for producing an aromatics product containing of benzene, toluene, xylenes, or mixtures thereof. The process is carried out by converting precursors of benzene, toluene, and xylenes that are contained in a hydrocarbon feed (C6+ non-aromatic cyclic hydrocarbons, A8+ single-ring aromatic hydrocarbons having at least one alkyl group containing two or more carbon atoms; and A9+ single-ring aromatic hydrocarbons having at least three methyl groups) to produce a product that contains an increased amount of benzene, toluene, xylenes, or combinations thereof compared to said hydrocarbon feed.
    Type: Application
    Filed: August 24, 2006
    Publication date: February 28, 2008
    Inventors: Elizabeth L. Stavens, Stephen H. Brown, J. Scott Buchanan, Yun-feng Chang, Larry L. Iaccino, Paul F. Keusenkothen, John D. Y. Ou, Randall D. Partridge
  • Publication number: 20070249880
    Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is supplied to one or more reaction zone(s) containing catalytic material operating under reaction conditions effective to convert at least a portion of the methane to aromatic hydrocarbons; the reaction zone(s) being operated with an inverse temperature profile.
    Type: Application
    Filed: April 18, 2007
    Publication date: October 25, 2007
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar, Jeremy J. Patt
  • Publication number: 20070249740
    Abstract: In a process for converting methane to aromatic hydrocarbons, a feed containing methane is contacted with a dehydrocyclization catalyst in a reaction zone under conditions including a first maximum temperature effective to convert the methane to aromatic hydrocarbons and generate coke on the catalyst. A portion of the coked catalyst is transferred from the reaction zone to a separate regeneration zone, where the catalyst portion is contacted with a regeneration gas under conditions including a second maximum temperature less than or equal to the first maximum temperature and effective to at least partially remove coke from the catalyst portion. Before being returned to the reaction zone, the regenerated catalyst portion is contacted with a carburizing gas in a catalyst treatment zone separate from the reaction zone at a third maximum temperature less than the first maximum temperature.
    Type: Application
    Filed: April 5, 2007
    Publication date: October 25, 2007
    Inventors: Larry L. Iaccino, Neeraj Sangar, Elizabeth L. Stavens
  • Publication number: 20070249879
    Abstract: A process for converting methane to higher hydrocarbon(s) including aromatic hydrocarbon(s) comprises providing a hydrocarbon feedstock containing methane and a catalytic particulate material to a reactor system having at least first and second reaction zones connected in series. Each of the reaction zones is operated under reaction conditions sufficient to convert at least a portion of the methane to said higher hydrocarbon(s) and is maintained in a moving bed fashion, with the bulk of the catalytic particulate material being moved from the first reaction zone to the second reaction zone and with the bulk of the hydrocarbon feedstock being moved from the second reaction zone to the first reaction zone.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 25, 2007
    Inventors: Larry L. Iaccino, Elizabeth L. Stavens, Neeraj Sangar