Patents by Inventor Lubin Luo

Lubin Luo 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).

  • Publication number: 20200362071
    Abstract: Disclosed are methods for the production of polymers, including random copolymers (RCPs), in single reactor gas or slurry phase polymerization processes, and polymer compositions produced therefrom. The methods enable polymers having low melting temperatures to be made in gas and slurry phase polymerization processes, where they conventionally could not be made in these processes due to stickiness and fouling problems in the reactor.
    Type: Application
    Filed: July 31, 2020
    Publication date: November 19, 2020
    Inventors: Lubin Luo, Jeanette M. Diop, Jian Yang, Sudhin Datta, Patrick Brant
  • Publication number: 20200325254
    Abstract: The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.
    Type: Application
    Filed: March 12, 2020
    Publication date: October 15, 2020
    Inventors: Tzu-Pin Lin, Lubin Luo, Alex E. Carpenter, Gursu Culcu, Catherine A. Faler, Irene C. Cai, John R. Hagadorn, Jo Ann M. Canich
  • Patent number: 10759886
    Abstract: Disclosed are methods for the production of polymers, including random copolymers (RCPs), in single reactor gas or slurry phase polymerization processes, and polymer compositions produced therefrom. The methods enable polymers having low melting temperatures to be made in gas and slurry phase polymerization processes, where they conventionally could not be made in these processes due to stickiness and fouling problems in the reactor.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: September 1, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Jeanette M. Diop, Jian Yang, Sudhin Datta, Patrick Brant
  • Patent number: 10723821
    Abstract: This invention relates to supported metallocene catalyst systems for polymerization, the catalyst systems comprising asymmetrically substituted indenyl groups, high surface area supports, and aluminoxane activators. This invention also relates to methods for polymerizing olefins, including methods for producing isotactic polypropylene.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: July 28, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jian Yang, Lubin Luo, Steven D. Brown, Xiongdong Lian
  • Publication number: 20200223950
    Abstract: Methods for the production of heterophasic polymers in gas and slurry phase polymerization processes, and polymer compositions made therefrom, are disclosed herein.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 16, 2020
    Inventors: Lubin Luo, Jeanette M. Diop, Jian Yang, Sudhin Datta, Patrick Brant
  • Patent number: 10640583
    Abstract: This invention relates to a catalyst system comprising fluorided silica, alkylalumoxane activator and at least two metallocene catalyst compounds, where the first metallocene is a bridged monocyclopentadienyl group 4 transition metal compound and the second metallocene is a biscyclopentadientyl group 4 transition metal compound, where the fluorided support has not been calcined at a temperature of 400° C. or more, and is preferably produced using a west mixing method, such as an aqueous method.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: May 5, 2020
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: Xuan Ye, Matthew W. Holtcamp, Lubin Luo, Laughlin G. McCullough, Gregory S. Day, Francis C. Rix, Jo Ann M. Canich, David F. Sanders, Matthew S. Bedoya
  • Publication number: 20200094234
    Abstract: A process to form a cyclic olefin polymerization catalyst which includes contacting a metal alkoxide with a transition metal halide to form a transition metal precatalyst, and contacting the transition metal precatalyst with a metal alkyl activator to form the activated catalyst comprising a transition metal carbene moiety. A cyclic olefin polymerization process is also disclosed.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 26, 2020
    Inventors: Lubin Luo, Edward J. Blok, Alan A. Galuska, Anupriya Jain, Alexander V. Zabula, Yen-Hao Lin
  • Publication number: 20200094233
    Abstract: A supported catalyst system is based on a transition metal carbene including the moiety M1=CR*)2, wherein M1 is the transition metal and R* is hydrogen or a C1-C8 hydrocarbyl. The catalyst system can be supported on a metal oxide support such as silica or the catalyst can be self-supporting. Methods of making the catalyst system can involve precursors based on and/or reacted with aluminum alkyls, halides, and/or alkoxides. Methods of polymerizing cyclic olefins with the catalyst system can obtain polyalkenamers, cyclic olefin polymers, cyclic olefin copolymers, and other metathesis reaction products. The supported catalyst and/or monomer can be recovered and recycled to the polymerization reactor.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 26, 2020
    Inventors: Lubin Luo, Edward J. Blok, Alan A. Galuska, Anupriya Jain, Alexander V. Zabula, Yen-Hao Lin
  • Patent number: 10570219
    Abstract: Methods for the production of heterophasic polymers in gas and slurry phase polymerization processes, and polymer compositions made therefrom, are disclosed herein.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: February 25, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Jeanette M. Diop, Jian Yang, Sudhin Datta, Patrick Brant
  • Publication number: 20190330460
    Abstract: Heterophasic copolymers of propylene and an alpha olefin comonomer having a matrix phase and a fill phase, particularly, a heterophasic copolymer having a high fill phase content (greater than or equal to 50%), are provided herein. Polymerization methods and catalyst systems for producing such heterophasic copolymers are also provided.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 31, 2019
    Inventors: Lubin Luo, Xin Chen, Yen-Hao Lin, Anupriya Jain, Matthew S. Bedoya, Medrado M. Leal, Rebecca C. Savage, Rachel G. Terry, Sergey Yakovlev
  • Patent number: 10329360
    Abstract: The invention is directed to a supported olefin polymerization catalyst system comprising catalyst compound, silica support and alumoxane activator, where part of the alumoxane is present on the support and part of the alumoxane is not associated with the support, wherein the silica comprises silica particles having an average surface area of greater than about 400 m2/g, an average pore diameter of less than about 70 Angstroms, and wherein alumoxane is present on the support in an amount of less than 7 mmol Al/g silica and at least 1 wt % of alumoxane particles not associated with the support are present in the catalyst system, based upon the weight of the catalyst system.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: June 25, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Lubin Luo
  • Publication number: 20190153135
    Abstract: This invention provides activator precursor compositions and activator compositions. The activator precursor compositions are formed from a support material, a linking compound, and polyfunctional compounds having at least two aromatic groups in which at least two of said aromatic groups each has at least one polar moiety thereon. The activator compositions are formed from a support material, a linking compound, an aluminoxane, and a polyfunctional compound having at least two aromatic groups in which at least two of said aromatic groups each has at least one polar moiety thereon. Also provided are catalyst compositions, processes for forming catalyst compositions, and polymerization processes utilizing the catalyst compositions of this invention.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 23, 2019
    Inventors: Steven P. Diefenbach, Min Li, Matthew Grant Thorn, Lubin Luo
  • Patent number: 10294316
    Abstract: Olefin polymerization catalyst systems having high aluminoxane loading and methods for making and using them are disclosed herein.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: May 21, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Anupriya Jain, Xuan Ye
  • Patent number: 10287372
    Abstract: This invention relates to high porosity (?15%) and/or low pore diameter (PD<165 ?m) propylene polymers and propylene polymerization processes using single site catalyst systems with supports having high surface area (SA?400 m2/g), low pore volume (PV?2 mL/g), a specific mean pore diameter range (PD=1-20 nm), and high average particle size (PS?30 ?m).
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: May 14, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Matthew W. Holtcamp, Gregory S. Day
  • Patent number: 10280233
    Abstract: Olefin polymerization catalyst systems and methods for making and using the same are provided.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: May 7, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Anupriya Jain, Xuan Ye
  • Patent number: 10280235
    Abstract: This invention relates to propylene polymers having multimodal molecular weight distribution and propylene polymerization processes using single site catalyst systems with supports having multimodal particle size distribution comprising one mode peaked at particle size of 3-70 ?m, and another mode peaked at particle size of 70-200 ?m, the support also having an average particle size of more than 30 ?m up to 200 ?m and a specific surface area of 400-800 m2/g.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: May 7, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Lubin Luo
  • Publication number: 20190127499
    Abstract: The present disclosure provides methods for preparing a catalyst system comprising contacting in an aliphatic solvent at least one support material, at least one hydrocarbyl aluminum compound and at least one non-hydrolytic active oxygen-containing compound to form a supported alumoxane (catalyst precursor) and contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom. The supported alumoxane may be heated prior to contact with the catalyst compound.
    Type: Application
    Filed: September 17, 2018
    Publication date: May 2, 2019
    Inventors: Charles J. Harlan, Steven C. Haas, Lubin Luo, Francis C. Rix, Xuan Ye
  • Publication number: 20190127497
    Abstract: The present disclosure provides a method for preparing a catalyst system comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to ?60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to form a supported alumoxane (catalyst precursor) and contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom. The supported alumoxane may be heated prior to contact with the catalyst compound.
    Type: Application
    Filed: September 17, 2018
    Publication date: May 2, 2019
    Inventors: Lubin Luo, Anupriya Jain, Charles J. Harlan
  • Patent number: 10221264
    Abstract: This invention provides activator precursor compositions and activator compositions. The activator precursor compositions are formed from a support material, a linking compound, and polyfunctional compounds having at least two aromatic groups in which at least two of said aromatic groups each has at least one polar moiety thereon. The activator compositions are formed from a support material, a linking compound, an aluminoxane, and a polyfunctional compound having at least two aromatic groups in which at least two of said aromatic groups each has at least one polar moiety thereon. Also provided are catalyst compositions, processes for forming catalyst compositions, and polymerization processes utilizing the catalyst compositions of this invention.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 5, 2019
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Steven P. Diefenbach, Min Li, Matthew Grant Thorn, Lubin Luo
  • Publication number: 20180334517
    Abstract: Catalyst systems including a catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom, an activator, and a support material composition, are provided. The support material composition may have a volume percent of pores with a pore size of from 300 angstroms to 1500 angstroms of 10 vol % to 80 vol %. Processes for producing a polyolefin composition utilizing such catalyst systems are also provided.
    Type: Application
    Filed: April 11, 2018
    Publication date: November 22, 2018
    Inventors: Xuan Ye, Lubin Luo, Charles J. Harlan, Chi-I Kuo, Richard B. Pannell, William A. Lamberti