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: 20180171040
    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: Application
    Filed: March 10, 2016
    Publication date: June 21, 2018
    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: 20180162964
    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: Application
    Filed: May 27, 2016
    Publication date: June 14, 2018
    Inventors: Jian Yang, Lubin Luo, Steven D Brown, Xiongdong Lian
  • Publication number: 20180142045
    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: Application
    Filed: June 3, 2016
    Publication date: May 24, 2018
    Inventor: Lubin Luo
  • Publication number: 20180142046
    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: Application
    Filed: June 3, 2016
    Publication date: May 24, 2018
    Inventor: Lubin Luo
  • Patent number: 9920176
    Abstract: This invention relates to catalyst 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), supported catalysts, and supportation processes; and further relates to: high porosity (?15%) and/or low pore diameter (PD<165 ?m) propylene polymers; bimodal polymers and/or heterophasic copolymers based on the high porosity and/or low pore diameter propylene polymers; propylene polymerization processes using the supported catalysts and/or to prepare the high porosity and/or low pore diameter propylene polymers, bimodal polymers and/or heterophasic copolymers.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: March 20, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Gregory S. Day, Jian Yang, Matthew W. Holtcamp
  • Publication number: 20180022843
    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: Application
    Filed: October 2, 2017
    Publication date: January 25, 2018
    Inventors: Lubin Luo, Matthew W. Holtcamp, Gregory S. Day
  • Publication number: 20170306136
    Abstract: This invention relates to heterophasic copolymers of propylene and an alpha olefin comonomer having a high fill phase content (?15%), and heterophasic polymerization processes using a single site catalyst system with a support having high average particle size (PS?30 ?m), high surface area (SA?400 m2/g), low pore volume (PV?2 mL/g), and a mean pore diameter range of 1?PD?20 nm.
    Type: Application
    Filed: July 7, 2017
    Publication date: October 26, 2017
    Inventors: Lubin Luo, Gregory S. Day, Matthew W. Holtcamp
  • Publication number: 20170253676
    Abstract: Olefin polymerization catalyst systems and methods for making and using the same are provided.
    Type: Application
    Filed: May 19, 2017
    Publication date: September 7, 2017
    Inventors: Lubin Luo, Anupriya Jain, Xuan Ye
  • Patent number: 9738779
    Abstract: This invention relates to heterophasic copolymers of propylene and an alpha olefin comonomer having a high fill phase content (?15%), and heterophasic polymerization processes using a single site catalyst system with a support having high average particle size (PS?30 ?m), high surface area (SA?400 m2/g), low pore volume (PV?2 mL/g), and a mean pore diameter range of 1?PD?20 nm.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: August 22, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Gregory S. Day, Matthew W. Holtcamp
  • Patent number: 9725569
    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: April 29, 2016
    Date of Patent: August 8, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Gregory S. Day, Jian Yang, Lubin Luo, Steven D. Brown, Rohan A. Hule
  • Patent number: 9725537
    Abstract: This invention relates to single site catalyst supportation methods involving high temperature treatment (?40° C., e.g., 100-130° C.) to improve catalyst activity for olefin polymerization, e.g., propylene polymerization, and to the supported catalyst systems obtained by the methods, e.g., single site catalyst systems supported on a support having high average particle size (PS?30 ?m), high surface area (SA?200 m2/g), low pore volume (PV?2 mL/g), and a mean pore diameter range of 1?PD?20 nm.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: August 8, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Lubin Luo, Gregory S. Day
  • Publication number: 20160355618
    Abstract: Olefin polymerization catalyst systems having high aluminoxane loading and methods for making and using them are disclosed herein.
    Type: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Lubin Luo, Anupriya Jain, Xuan Ye
  • Publication number: 20160355657
    Abstract: This invention relates to heterophasic copolymers of propylene and an alpha olefin comonomer having a high fill phase content (?15%), and heterophasic polymerization processes using a single site catalyst system with a support having high average particle size (PS?30 ?m), high surface area (SA?400 m2/g), low pore volume (PV?2 mL/g), and a mean pore diameter range of 1?PD?20 nm.
    Type: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Lubin Luo, Gregory S. Day, Matthew W. Holtcamp
  • Publication number: 20160355619
    Abstract: Olefin polymerization catalyst systems having high aluminoxane loading and methods for making and using them are disclosed herein.
    Type: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Lubin Luo, Anupriya Jain, Xuan Ye
  • Publication number: 20160355656
    Abstract: This invention relates to catalyst 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), supported catalysts, and supportation processes; and further relates to: high porosity (?15%) and/or low pore diameter (PD<165 ?m) propylene polymers; bimodal polymers and/or heterophasic copolymers based on the high porosity and/or low pore diameter propylene polymers; propylene polymerization processes using the supported catalysts and/or to prepare the high porosity and/or low pore diameter propylene polymers, bimodal polymers and/or heterophasic copolymers.
    Type: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Lubin Luo, Gregory S. Day, Jian Yang, Matthew W. Holtcamp
  • Publication number: 20160355654
    Abstract: This invention relates to single site catalyst supportation methods involving high temperature treatment (?40° C., e.g., 100-130° C.) to improve catalyst activity for olefin polymerization, e.g., propylene polymerization, and to the supported catalyst systems obtained by the methods, e.g., single site catalyst systems supported on a support having high average particle size (PS?30 ?m), high surface area (SA?200 m2/g), low pore volume (PV?2 mL/g), and a mean pore diameter range of 1?PD?20 nm.
    Type: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Lubin Luo, Gregory S. Day
  • Publication number: 20160355653
    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: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Matthew W. Holtcamp, Gregory S. Day, Jian Yang, Lubin Luo, Steven D. Brown, Rohan A. Hule
  • Patent number: 9090720
    Abstract: This invention relates to an activator composition comprising (i) an organoaluminum compounds; (ii) a carbocation compound of the formula R1(X)n; wherein R1 is a hydrocarbyl; n is from 1 to the number of possible substitutions of the hydrocarbyl group and each X is a labile leaving group; and (iii) an aluminoxane. The activator composition may also contain a carrier support. This invention also provides a catalyst composition comprising the activator composition described above and a transition metal component. This invention also provides methods of polymerizing monomer comprising carrying out such polymerization in the presence of one or more catalyst composition according to this invention.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: July 28, 2015
    Assignee: ALBEMARLE CORPORATION
    Inventors: Lubin Luo, Xiao Wu, Steven P. Diefenbach
  • Publication number: 20150105238
    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: March 14, 2013
    Publication date: April 16, 2015
    Inventors: Steven P. Diefenbach, Min Li, Matthew Grant Thorn, Lubin Luo
  • Patent number: 8895465
    Abstract: This invention provides activator precursor compositions and activator compositions. The activator precursor compositions are formed from a support material, an organoaluminum 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, an organoaluminum 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: November 14, 2011
    Date of Patent: November 25, 2014
    Assignee: Albemarle Corporation
    Inventor: Lubin Luo