Patents by Inventor Hongguang Cai

Hongguang Cai 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).

  • Method for producing soluble neodymium chloride complex
    Patent number: 8350072
    Abstract: The invention provides a method for producing soluble neodymium chloride complex using neodymium chloride aqueous solution as raw material, thereby avoiding the use of anhydrous neodymium chloride, simplifying the synthesis process and reducing the cost for synthesizing neodymium chloride complex. The neodymium chloride complex produced by this method is soluble not only in polar solvent, but also in nonpolar solvent. Such neodymium chloride complex also has good dissolvability in aliphatic hydrocarbon solvent which has relatively weaker solution power, and even in aliphatic hydrocarbon solvent with 6 or less carbon atoms which has even lower solution power. Since neodymium chloride complex is soluble in aliphatic hydrocarbon solvent, its transportation may be conducted, which is convenient for industrial application and contributes to improve the utilization efficiency of rare earth.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: January 8, 2013
    Assignee: CHangchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Jifu Bi, Xuequan Zhang, Liansheng Jiang, Hongguang Cai, Bei Wang, Chunyu Zhang, Lihua Na, Quanquan Dai, Changliang Fan
  • METHOD FOR PRODUCING SOLUBLE NEODYMIUM CHLORIDE COMPLEX
    Publication number: 20110160473
    Abstract: The invention provides a method for producing soluble neodymium chloride complex using neodymium chloride aqueous solution as raw material, thereby avoiding the use of anhydrous neodymium chloride, simplifying the synthesis process and reducing the cost for synthesizing neodymium chloride complex. The neodymium chloride complex produced by this method is soluble not only in polar solvent, but also in nonpolar solvent. Such neodymium chloride complex also has good dissolvability in aliphatic hydrocarbon solvent which has relatively weaker solution power, and even in aliphatic hydrocarbon solvent with 6 or less carbon atoms which has even lower solution power. Since neodymium chloride complex is soluble in aliphatic hydrocarbon solvent, its transportation may be conducted, which is convenient for industrial application and contributes to improve the utilization efficiency of rare earth.
    Type: Application
    Filed: November 2, 2010
    Publication date: June 30, 2011
    Applicant: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Jifu Bi, Xuequan Zhang, Liansheng Jiang, Hongguang Cai, Bei Wang, Chunyu Zhang, Lihua Na, Quanquan Dai, Changliang Fan
  • Catalysts for synthesizing a polypropylene with a wide molecular weight distribution and use of the same
    Patent number: 7723449
    Abstract: The present invention relates to a catalyst for synthesizing a polypropylene with a wide molecular weight distribution and use of the same. The catalyst comprises magnesium halide, titanium-containing compound, and an organic phosphate type electron donor compound. By the catalyst according to the present invention, a propylene polymer with a wide molecular weight distribution, easily controllable isotacticity and good processing properties can be synthesized.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: May 25, 2010
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Chunyu Zhang, Hongguang Cai, Bin Chen, Yuping Yuan, Qiaofeng Zhang, Weimin Dong, Xuequan Zhang
  • Catalyst for synthesizing a polypropylene with a wide molecular weight distribution and use of the same
    Publication number: 20090023881
    Abstract: The present invention relates to a catalyst for synthesizing a polypropylene with a wide molecular weight distribution and use of the same. The catalyst comprises magnesium halide, titanium-containing compound, and an organic phosphate type electron donor compound. By the catalyst according to the present invention, a propylene polymer with a wide molecular weight distribution, easily controllable isotacticity and good processing properties can be synthesized.
    Type: Application
    Filed: July 3, 2008
    Publication date: January 22, 2009
    Inventors: Chunyu Zhang, Hongguang Cai, Bin Chen, Yuping Yuan, Qiaofeng Zhang, Weimin Dong, Xuequan Zhang