Patents Assigned to ExxonMobil Chemical Patents Inc.
  • Methods for making polyethylene polymers
    Patent number: 11230614
    Abstract: Methods for reducing gels and/or dome sheeting in gas phase polymerization processes and their resulting products are provided. The polymerization processes include polymerizing ethylene and one or more optional comonomers in a fluidized bed reactor in the presence of a metallocene catalyst, hydrogen, and at least one condensing agent.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: January 25, 2022
    Assignee: ExxonMobil Chemical Patent Inc.
    Inventors: Brandon C. Locklear, Haiqing Peng, Bruce J. Savatsky, James M. Farley, Daniel P. Zilker, Robert O. Hagerty, Michael E. Muhle, Fathi D. Hussein
  • Methods for removing impurities from a hydrocarbon stream and their use in aromatic alkylation processes
    Patent number: 11230515
    Abstract: Methods for removing impurities from a hydrocarbon stream using a guard bed material are disclosed. The guard bed material includes compositions which comprises a zeolite and a mesoporous support or binder. The zeolite has a Constraint Index of less than 3. The mesoporous support or binder comprises a mesoporous metal oxide having a particle diameter of greater than or equal to 20 ?m at 50% of the cumulative pore size distribution (d50), a pore volume of less than 1 cc/g, and an alumina content of greater than 75%, by weight. Also disclosed are processes for producing mono-alkylated aromatic compounds (e.g., ethylbenzene or cumene) using impure feed streams that are treated by the disclosed methods to remove impurities which act as catalyst poisons to downstream alkylation and/or transalkylation catalysts.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: January 25, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew S. Ide, Doron Levin, Scott J. Weigel, Brett T. Loveless, Jean W. Beeckman
  • Supported transition metal bis(phenolate) complexes and their use as catalysts for olefin polymerization
    Patent number: 11225539
    Abstract: This invention relates to supported catalyst compositions of transition metal complexes of a dianionic, tridentate ligand that features a central neutral heterocyclic Lewis base and two phenolate donors, where the tridentate ligand coordinates to the metal center to form two eight-membered rings. Preferably the bis(phenolate) complexes are represented by Formula (I): where M, L, X, m, n, E, E?, Q, R1, R2, R3, R4, R1?, R2?, R3?, R4?, A1, A1?, A3A2, and A2?A3? are as defined herein, where A1QA1? are part of a heterocyclic Lewis base containing 4 to 40 non-hydrogen atoms that links A2 to A2? via a 3-atom bridge with Q being the central atom of the 3-atom bridge.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: January 18, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Charles J. Harlan, Nikola S. Lambic, John R. Hagadorn, Jo Ann M. Canich
  • Films and methods of making the same
    Patent number: 11220092
    Abstract: Disclosed are films including polypropylene impact copolymers for tarpaulin applications which can provide a combination of desired properties.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: January 11, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Saifudin M. Abubakar, Jieyu Jin, Yinjie Zhang, Yanan Gong
  • Fibers and nonwoven materials prepared therefrom
    Patent number: 11214036
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and a broad molecular weight polypropylene or a broad molecular weight impact copolymer. The broad molecular weight polypropylene has a molecular weight distribution (MWD) of greater than 4.5. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the propylene homopolymer component has a molecular weight distribution (MWD) of greater than 4.5.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
  • (Di)silicon bridged metallocenes that produce polyethylene with broad molecular weight distribution and high molecular weight
    Patent number: 11214631
    Abstract: This invention relates to catalyst systems comprising a catalyst compound having a bridged group 4 metal metallocene (where the bridge preferably contains an (Me2Si)2 group, an activator, and a support material. In some embodiments, the present disclosure provides for polyolefins and a process for producing a polyolefin composition comprising contacting at least one olefin with a catalyst system.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jian Yang, Gregory J. Karahalis, Timothy M. Boller, Yan Jiang
  • Metallocene catalyst feed system for solution polymerization process
    Patent number: 11213798
    Abstract: Methods and systems for solution polymerization. The method can include forming a first mixture stream consisting essentially of at least one catalyst and a process solvent, and forming a second mixture stream consisting essentially of at least one activator and the process solvent. The first mixture stream and the second mixture stream can be fed separately to at least one reaction zone comprising one or more monomers dissolved in the process solvent where the at least one monomers can be polymerized within the at least one reaction zone in the presence of the catalyst, activator and process solvent to produce a polymer product.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Vetkav R. Eswaran, Jay L. Reimers, Keith C. Gallow
  • Dehydrogenation catalysts and methods of making and using the same
    Patent number: 11213804
    Abstract: Disclosed herein are methods of preparing dehydrogenation catalysts using non-halogen containing metal sources. The methods generally comprise the steps of providing a first solution comprising anions of a first metal selected from Group 14 of the Periodic Table of Elements, and impregnating an inorganic support with the first solution to obtain a first impregnated inorganic support, wherein the first solution has a pH value of less than the isoelectric point of the inorganic support. The dehydrogenation catalysts prepared in accordance with the methods of the present disclosure are typically free or substantially free of halogen species. Such catalysts may be particularly useful in the dehydrogenation of a feed comprising cyclohexane and/or methylcyclopentane.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Doron Levin
  • Lewis base catalysts and methods thereof
    Patent number: 11214634
    Abstract: The present disclosure relates to Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the Lewis base catalysts can be stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high melting points, high isotacticity, and controllable molecular weights, and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Georgy P. Goryunov, Oleg V. Samsonov, Dmitry V. Uborsky, Alexander Z. Voskoboynikov, Jo Ann M. Canich, John R. Hagadorn
  • Polymer blends and articles made therefrom
    Patent number: 11214659
    Abstract: Polymer compositions including (A) 15.0 to 90.0 wt % of a heterogeneously branched ethylene polymer having polymer units derived from at least one C3-C20 alpha-olefin and having a CBDI<50.0%; and (B) 85.0 to 10.0 wt. % of an ethylene-based polymer and films made therefrom are disclosed.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: January 4, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Zhenyu Zhu, Jianya Cheng
  • Process for producing polyethylene polymers
    Patent number: 11208513
    Abstract: A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: December 28, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Corrine L. Brandl, William A. Lamberti, Charles R. Buhler, Judson S. Clements, Harry W. Deckman, Joseph Moebus, Marc L. DeChellis
  • Removal of unreacted monomers and other materials from polyolefin product particles
    Patent number: 11208506
    Abstract: A method for the removal of unreacted olefin monomer(s) from polyolefin product particles of an olefin polymerization reaction, the method including: contacting the polyolefin product particles with a countercurrent flow of a purge gas in a purge vessel under conditions allowing diffusion of unreacted monomer and other gaseous substances from the polyolefin product particles into the countercurrent flow of the purge gas to produce purged particles; wherein the velocity of the purge gas exceeds 50% of the calculated minimum fluidization velocity of the polyolefin product particles in the purge vessel (Umf), is provided.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: December 28, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael G. Tribo, David J. Sandell
  • Catalyst and its use in dehydrocyclization processes
    Patent number: 11203557
    Abstract: The invention relates to catalysts and their use in processes for dehydrocyclization of light paraffinic hydrocarbon feedstock to higher-value hydrocarbon, such as aromatic hydrocarbon, to dehydrocyclization catalysts useful in such processes, and to the methods of making such catalysts. One of more of the dehydrocyclization catalysts comprising a crystalline aluminosilicate zeolite having a constraint index of less than or equal to about 12, at least one Group 3 to Group 13 metal of the IUPAC Periodic Table and phosphorous.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: December 21, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Samia Ilias, Mayank Shekhar, Paul F. Keusenkothen, John S. Buchanan
  • Bis(aryl phenolate) lewis base catalysts and methods thereof
    Patent number: 11203654
    Abstract: The present disclosure relates to bis(aryl phenolate) Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copolymerization as the bis(aryl phenolate) Lewis base catalysts are stable at high polymerization temperatures and have good activity at the high polymerization temperatures. The stable catalysts with good activity can provide formation of polymers having high molecular weights and the ability to make an increased amount of polymer in a given reactor, as compared to conventional catalysts. Hence, the present disclosure demonstrates highly active catalysts capable of operating at high reactor temperatures while producing polymers with controlled molecular weights and or robust isotacticity.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: December 21, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Georgy P. Goryunov, Vladislav A. Popov, Dmitry V. Uborsky, Alexander Z. Voskoboynikov, John R. Hagadorn, Irene C. Cai, Hua Zhou, Jo Ann M. Canich
  • Catalyst systems including two hafnocene catalyst compounds
    Patent number: 11198747
    Abstract: The present disclosure relates to dual catalyst systems and processes for use thereof. The present disclosure further provides a catalyst system that is a combination of at least two hafnium metallocene catalyst compounds. The catalyst systems may be used for olefin polymerization processes. The present disclosure further provides for polymers, which can be formed by processes and catalyst systems of the present disclosure.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: December 14, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Laughlin G. McCullough, Kevin A. Stevens, Subramaniam Kuppuswamy, Matthew S. Bedoya
  • Poly(alpha-olefin)s and methods thereof
    Patent number: 11198745
    Abstract: The present disclosure relates to poly(alpha-olefin)s and methods for making poly(alpha-olefin)s. A poly(alpha-olefin) may include about 95 wt % or greater C10-C18 alpha-olefin content and have a weight average molecular weight of from about 1,000,000 g/mol to about 10,000,000 g/mol. A method for forming a poly(alpha-olefin) may include introducing one or more C10-C18 alpha-olefins to a catalyst system comprising a catalyst compound and an activator. The method may include obtaining poly(alpha-olefin)s comprising about 95 wt % or greater C10-C18 alpha-olefin content and having a weight average molecular weight of from about 1,000,000 g/mol to about 10,000,000 g/mol.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: December 14, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Carlos R. Lopez-Barron, Andy H. Tsou, John R. Hagadorn, Sarah J. Mattler
  • Processes for converting aromatic hydrocarbons via alkyl-demethylation
    Patent number: 11198659
    Abstract: Alkyl-demethylation of C2+-hydrocarbyl substituted aromatic hydrocarbons can be utilized to treat one or more of a heavy naphtha reformate stream, a hydrotreated SCN stream, a C8 aromatic hydrocarbon isomerization feed stream, a C9+ aromatic hydrocarbon transalkylation feed stream, and similar hydrocarbon streams to produce additional quantity of xylene products.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: December 14, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Hari Nair, Meha Rungta, Michel Molinier, Doron Levin, Scott J. Weigel, Michael Salciccioli, John F. Brody
  • Production of methyl-substituted biphenyl compounds
    Patent number: 11198660
    Abstract: In a process for producing a methyl-substituted biphenyl compound, at least one methyl-substituted cyclohexylbenzene compound of the formula: wherein each of m and n is independently 1, 2, or 3, is contacted with hydrogen in the presence of a hydrogenation catalyst to produce a hydrogenation reaction product comprising at least one methyl-substituted bicyclohexane compound, and the methyl-substituted bicyclohexane compound is then contacted with a dehydrogenation catalyst to produce a dehydrogenation reaction product comprising at least one methyl-substituted biphenyl compound.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: December 14, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Lorenzo C. Decaul, Michael P. Lanci, Wei Tang
  • Polyoxometalates comprising noble metals and carboxylate-based capping groups and metal-clusters thereof
    Patent number: 11192835
    Abstract: The invention relates to polyoxometalates represented by the formula (An)m+[M?M12Oy(RCOO)zHq]m? or solvates thereof, corresponding supported polyoxometalates, and processes for their preparation, as well as corresponding metal clusters, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in reductive conversion of organic substrate.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: December 7, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tian Ma, Peng Yang, Wassim W. Ayass, Zhengguo Lin, Ulrich Kortz
  • Methods for making polyolefin polymer compositions
    Patent number: 11193008
    Abstract: A method for increasing the melt strength of a polyolefin polymer composition is provided. The method includes mixing a first polyolefin composition derived from at least one olefin polymerization catalyst (a) and at least one olefin polymerization catalyst (b) with a second polyolefin composition derived from the at least one olefin polymerization catalyst (b) or from at least one olefin polymerization catalyst (c), and obtaining the polyolefin polymer composition.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 7, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Ching-Tai Lue, Mark K. Davis, Wesley R. Mariott, Daniel P. Zilker, Phuong A. Cao