Patents by Inventor Chuanfeng Li

Chuanfeng 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).

  • Publication number: 20120214957
    Abstract: This invention relates to a supported nonmetallocene catalyst and preparation thereof. The supported nonmetallocene catalyst can be produced with a simple and feasible process and is characterized by an easily controllable polymerization activity. This invention further relates to use of the supported nonmetallocene catalyst in olefin homopolymerization/copolymerization, which is characterized by a lowered assumption of the co-catalyst as compared with the prior art.
    Type: Application
    Filed: October 13, 2010
    Publication date: August 23, 2012
    Inventors: Chuanfeng Li, Hongping Ren, Xiaoli Yao, Zhonglln Ma, Feng Guo, Kaixiu Wang, Jingwei Liu, Yaming Wang, Lijuan Yang
  • Patent number: 8193288
    Abstract: This invention relates to a supported nonmetallocene catalyst for olefin polymerization, which is produced by directly reacting a nonmetallocene ligand with a catalytically active metallic compound on a carrier through an in-situ supporting process. The process according to this invention is simple and feasible, and it is easy to adjust the load of the nonmetallocene ligand on the porous carrier. The supported nonmetallocene catalyst according to this invention can be used for olefin homopolymerization/copolymerization, even in combination with a comparatively less amount of the co-catalyst, to achieve a comparatively high polymerization activity. Further, the polymer product obtained therewith boasts desirable polymer morphology and a high bulk density.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: June 5, 2012
    Assignee: Sinopec Yangzi Petro-Chemical Ltd.
    Inventors: Yuefeng Gu, Chuanfeng Li, Xiaoli Yao, Zhonglin Ma, Bo Liu, Feng Guo, Yaming Wang, Jiye Bai, Shaohui Chen, Xiaoqiang Li
  • Publication number: 20110237764
    Abstract: The present invention relates to a magnesium compound-supported nonmetallocene catalyst, which is produced by directly contacting a catalytically active metallic compound with a nonmetallocene ligand-containing magnesium compound, or by directly contacting a nonmetallocene ligand with a catalytically active metal-containing magnesium compound, through an in-situ supporting process. The process is simple and flexible. In the process, there are many variables in response for adjusting the polymerization activity of the catalyst, and the margin for adjusting the catalyst load or the catalyst polymerization activity is broad. The magnesium compound-supported nonmetallocene catalyst according to this invention can be used for olefin homopolymerization/copolymerization, in combination with a comparatively less amount of the co-catalyst, to achieve a comparatively high polymerization activity. Further, the polymer product obtained therewith boasts high bulk density and adjustable molecular weight distribution.
    Type: Application
    Filed: October 15, 2008
    Publication date: September 29, 2011
    Inventors: Yuefeng Gu, Xiaoli Yao, Chuanfeng Li, Zhonglin Ma, Feng Guo, Bo Liu, Yaming Wang, Shaohui Chen, Xiaoqiang Li, Jiye Bai
  • Publication number: 20110152486
    Abstract: This invention relates to a supported nonmetallocene catalyst for olefin polymerization, which is produced by directly reacting a nonmetallocene ligand with a catalytically active metallic compound on a carrier through an in-situ supporting process. The process according to this invention is simple and feasible, and it is easy to adjust the load of the nonmetallocene ligand on the porous carrier. The supported nonmetallocene catalyst according to this invention can be used for olefin homopolymerization/copolymerization, even in combination with a comparatively less amount of the co-catalyst, to achieve a comparatively high polymerization activity. Further, the polymer product obtained therewith boasts desirable polymer morphology and a high bulk density.
    Type: Application
    Filed: October 15, 2008
    Publication date: June 23, 2011
    Inventors: Yuefeng Gu, Chuanfeng Li, Xiaoli Yao, Zhonglin Ma, Bo Liu, Feng Guo, Yaming Wang, Jiye Bai, Shaohui Chen, Xiaoqiang Li
  • Patent number: 7875568
    Abstract: The present invention provides a method for supporting a nonmetallocene olefin polymerization catalyst, comprising the following steps: a carrier reacts with a chemical activator to obtain a modified carrier; a magnesium compound is dissolved in a tetrahydrofuran-alcohol mixed solvent to form a solution, then the modified carrier is added to the solution to perform a reaction, then filtered and washed, dried and suction dried to prepare a composite carrier; a nonmetallocene olefin polymerization catalyst is dissolved in a solvent, and then reacts with said composite carrier, then is washed and filtered, dried and suction dried, to prepare a supported nonmetallocene olefin polymerization catalyst. The present invention further relates to a supported nonmetallocene olefin polymerization catalyst as prepared by this method.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: January 25, 2011
    Assignee: Yangzi Petrochemical Company Co., Ltd.
    Inventors: Houliang Dai, Houping You, Chuanfeng Li, Xiaoli Yao, Lijin Zhou, Xiaoqiang Li, Yarning Wang, Zhonglin Ma, Jiye Bai
  • Publication number: 20080227936
    Abstract: The present invention provides a method for supporting a nonmetallocene olefin polymerization catalyst, comprising the following steps: a carrier reacts with a chemical activator to obtain a modified carrier; a magnesium compound is dissolved in a tetrahydrofuran-alcohol mixed solvent to form a solution, then the modified carrier is added to the solution to perform a reaction, then filtered and washed, dried and suction dried to prepare a composite carrier; a nonmetallocene olefin polymerization catalyst is dissolved in a solvent, and then reacts with said composite carrier, then is washed and filtered, dried and suction dried, to prepare a supported nonmetallocene olefin polymerization catalyst. The present invention further relates to a supported nonmetallocene olefin polymerization catalyst as prepared by this method.
    Type: Application
    Filed: October 21, 2005
    Publication date: September 18, 2008
    Applicant: YANGZI PETROCHEMICAL COMPANY CO., LTD.
    Inventors: Houliang Dai, Houping You, Chuanfeng Li, Xiaoli Yao, Lijin Zhou, Xiaoqing Li, Yarning Wang, Zhonglin Ma, Jiye Bai