Patents by Inventor Yingxian Zhao

Yingxian Zhao 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 preparing 2,3-dimethyl-2,3-dinitrobutane
    Patent number: 8692036
    Abstract: The present invention relates to a method for preparing 2,3-dimethyl-2,3-dinitrobutane (DMNB), which includes the following steps: (1) making titanium-silicate molecular sieve catalyst, acetone, hydrogen peroxide and ammonia contact and react at 65-80° C. to obtain a modified titanium-silicate molecular sieve catalyst; and (2-1) making acetone oxime and hydrogen peroxide contact and react in the presence of the modified titanium-silicate molecular sieve catalyst and water under the conditions of temperature of 60-90° C. and pH of 8-10, and separating DMNB from the reaction products thereof; or (2-2) making acetone, ammonia and hydrogen peroxide contact and react in the presence of the modified titanium-silicate molecular sieve catalyst and water under the conditions of temperature of 60-90° C. and pH of 8-10, and separating DMNB from the reaction products thereof.
    Type: Grant
    Filed: September 5, 2011
    Date of Patent: April 8, 2014
    Assignee: Ningbo Institute of Technology, Zhejiang University, Zhejiang
    Inventors: Shengjian Zhang, Yingxian Zhao, Hong Zhang
  • METHOD FOR PREPARING 2,3-DIMETHYL-2,3-DINITROBUTANE
    Publication number: 20130184504
    Abstract: The present invention relates to a method for preparing 2,3-dimethyl-2,3-dinitrobutane (DMNB), which includes the following steps: (1) making titanium-silicate molecular sieve catalyst, acetone, hydrogen peroxide and ammonia contact and react at 65-80° C. to obtain a modified titanium-silicate molecular sieve catalyst; and (2-1) making acetone oxime and hydrogen peroxide contact and react in the presence of the modified titanium-silicate molecular sieve catalyst and water under the conditions of temperature of 60-90° C. and pH of 8-10, and separating DMNB from the reaction products thereof; or (2-2) making acetone, ammonia and hydrogen peroxide contact and react in the presence of the modified titanium-silicate molecular sieve catalyst and water under the conditions of temperature of 60-90° C. and pH of 8-10, and separating DMNB from the reaction products thereof.
    Type: Application
    Filed: September 5, 2011
    Publication date: July 18, 2013
    Applicant: NINGBO INSTITUE OF TECHNOLOGY ZHEJIANG ZHEJIAND
    Inventors: Shengjian Zhang, Yingxian Zhao, Hong Zhang