Patents by Inventor Enxiu Guo

Enxiu Guo 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).

  • Process for synthesizing trioxymethylene using ionic liquid
    Patent number: 7598402
    Abstract: The present invention relates to a process for synthesizing trioxymethylene, wherein an aqueous solution of formaldehyde is used as the reactant; and an acidic ionic liquid in an amount of from 0.01 to 10 wt % is used as a catalyst.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: October 6, 2009
    Assignees: Lanzhou Institute of Chemical Physics Chinese Academy of Sciences, Blue Diamond International Co., Ltd.
    Inventors: Jing Chen, Heyuan Song, Chungu Xia, Zhonghua Tang, Xinzhi Zhang, Zhen Li, Enxiu Guo
  • Process For Synthesizing Trioxymethylene Using Ionic Liquid
    Publication number: 20080293954
    Abstract: The present invention relates to a process for synthesizing trioxymethylene, wherein an aqueous solution of formaldehyde is used as the reactant; and an acidic ionic liquid in an amount of from 0.01 to 10 wt % is used as a catalyst.
    Type: Application
    Filed: January 18, 2008
    Publication date: November 27, 2008
    Applicants: Lanzhou Institute of Chemical Physics Chinese Academy of Sciences, Blue Diamond International Co., Ltd.
    Inventors: Jing CHEN, Heyuan Song, Chungu Xia, Zhonghua Tang, Xinzhi Zhang, Zhen Li, Enxiu Guo
  • Method of synthesizing trioxymethylene from formaldehyde by the catalytic action of an ionic liquid
    Patent number: 7244854
    Abstract: The present invention relates to a method of synthesizing trioxymethylene from formaldehyde by the catalytic action of an acidic ionic liquid. In the method, formaldehyde solution with a concentration of 30˜80 wt % is used as reactant, and an ionic liquid is used as catalyst. The cation moiety of the catalyst is selected from either imidazoles cation or pyridines cation, and the anion moiety of the catalyst is selected from one of p-tolyl benzene sulfonate, trifluoromethyl sulfonate, and hydrogen sulfate. In the present invention, ionic liquid is used, for the first time, as a catalyst to synthesize trioxymethylene from formaldehyde. The catalyst can be circularly used for continuous sampling.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: July 17, 2007
    Assignee: Lanzhou Institute of Chemical Physics Chinese Academy of Sciences
    Inventors: Chungu Xia, Zhonghua Tang, Jing Chen, Xinzhi Zhang, Zhen Li, Enxiu Guo
  • METHOD OF SYNTHESIZING TRIOXYMETHYLENE FROM FORMALDEHYDE BY THE CATALYTIC ACTION OF AN IONIC LIQUID
    Publication number: 20070135649
    Abstract: The present invention relates to a method of synthesizing trioxymethylene from formaldehyde by the catalytic action of an acidic ionic liquid. In the method, formaldehyde solution with a concentration of 30˜80 wt % is used as reactant, and an ionic liquid is used as catalyst. The cation moiety of the catalyst is selected from either imidazoles cation or pyridines cation, and the anion moiety of the catalyst is selected from one of p-tolyl benzene sulfonate, trifluoromethyl sulfonate, and hydrogen sulfate. In the present invention, ionic liquid is used, for the first time, as a catalyst to synthesize trioxymethylene from formaldehyde. The catalyst can be circularly used for continuous sampling.
    Type: Application
    Filed: December 8, 2006
    Publication date: June 14, 2007
    Applicant: Lanzhou Institute of Chemical Physics Chinese Academy of Sciences
    Inventors: Chungu Xia, Zhonghua Tang, Jing Chen, Xinzhi Zhang, Zhen Li, Enxiu Guo