Patents by Inventor Rongbo Li

Rongbo Li 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: 11084890
    Abstract: A magnesium alkoxide catalyst support and the preparation method and use thereof are provided. The method for preparing the magnesium alkoxide catalyst support comprises the following steps: mixing a metallic magnesium, a monohydric alcohol, a halogenating agent and a surfactant at 0° C. to 90° C. under an inert gas atmosphere, and then washing the resultant with an inert solvent to obtain the magnesium alkoxide catalyst support. A magnesium alkoxide catalyst support obtained by the above method is also provided, which can be used to catalyze olefin polymerization. The magnesium alkoxide catalyst support obtained by the above method according to the invention has excellent particle morphology and controllable size, and is suitable for preparing a catalyst for olefin polymerization.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: August 10, 2021
    Inventors: Jianjun Yi, Kefeng Wang, Jie Hu, Xingfeng Chen, Yuan Yuan, Weisong Cui, Liang Cui, Zhifei Li, Rongbo Li
  • Patent number: 10808052
    Abstract: The present invention provides a spherical supported transition metal catalyst. The catalyst carrier is a spherical titanium/zirconium hydrophosphate compound, the primary catalyst is a transition metal compound, the co-catalyst is methylaluminoxane; the spherical titanium/zirconium hydrophosphate compound comprises one or several combinations of titanium hydrophosphate, modified titanium hydrophosphate and zirconium hydrophosphate. The present invention also provides a preparation method of said spherical supported transition metal catalyst and a use thereof in olefin polymerization, as well as the spherical titanium/zirconium hydrophosphate compound and its preparation method. The spherical, supported transition metal catalyst in the present invention has a high catalytic activity, and the polymer particles obtained have good morphology.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: October 20, 2020
    Assignee: PetroChina Company Limited
    Inventors: Yuan Yuan, Tianxu Sun, Jianjun Yi, Shan Xue, Kefeng Wang, Kuilong Tan, Li Wang, Rongbo Li
  • Publication number: 20190169324
    Abstract: A magnesium alkoxide catalyst support and the preparation method and use thereof are provided. The method for preparing the magnesium alkoxide catalyst support comprises the following steps: mixing a metallic magnesium, a monohydric alcohol, a halogenating agent and a surfactant at 0° C. to 90° C. under an inert gas atmosphere, and then washing the resultant with an inert solvent to obtain the magnesium alkoxide catalyst support. A magnesium alkoxide catalyst support obtained by the above method is also provided, which can be used to catalyze olefin polymerization. The magnesium alkoxide catalyst support obtained by the above method according to the invention has excellent particle morphology and controllable size, and is suitable for preparing a catalyst for olefin polymerization.
    Type: Application
    Filed: November 27, 2018
    Publication date: June 6, 2019
    Inventors: Jianjun YI, Kefeng Wang, Jie Hu, Xingfeng Chen, Yuan Yuan, Weisong Cui, Liang Cui, Zhifei Li, Rongbo Li
  • Publication number: 20180244812
    Abstract: The present invention provides a spherical supported transition metal catalyst. The catalyst carrier is a spherical titanium/zirconium hydrophosphate compound, the primary catalyst is a transition metal compound, the co-catalyst is methylaluminoxane; the spherical titanium/zirconium hydrophosphate compound comprises one or several combinations of titanium hydrophosphate, modified titanium hydrophosphate and zirconium hydrophosphate. The present invention also provides a preparation method of said spherical supported transition metal catalyst and a use thereof in olefin polymerization, as well as the spherical titanium/zirconium hydrophosphate compound and its preparation method. The spherical, supported transition metal catalyst in the present invention has a high catalytic activity, and the polymer particles obtained have good morphology.
    Type: Application
    Filed: February 19, 2016
    Publication date: August 30, 2018
    Inventors: Yuan Yuan, Tianxu Sun, Jianjun Yi, Shan Xue, Kefeng Wang, Kuilong Tan, Li Wang, Rongbo Li
  • Publication number: 20160102159
    Abstract: The present disclosure provides an olefin polymerization catalyst and a combined catalyst containing the same. The catalyst comprises a reaction product of a magnesium dialkoxide, a titanium compound, an electron donor compound A and an electron donor compound B, wherein the electron donor compound A is a sulfonyl compound represented by general formula I, X is a disubstituted or unsubstituted group 14 element atom, a monosubstituted or unsubstituted group 15 element atom or group 16 element atom, and the substituent is a monocyclic, polycyclic or heteroatom-containing cyclic group or an aliphatic chain; R1 and R2 are respectively hydrogen atom, halogen atom, substituted or unsubstituted alkyl, cycloalkyl, aryl, aralkyl, alkylaryl or heteroatom-containing cyclic group. The combined catalyst comprises the catalyst and an organoaluminium compound and can comprise an organosilicon compound.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 14, 2016
    Inventors: Weisong Cui, Jianjun Yi, Baozuo Yin, Kejing Gao, Kefeng Wang, Kuilong Tan, Yonggang Wang, Jing Mao, Rongbo Li