Patents by Inventor Zhangqing Luo

Zhangqing Luo 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 preparing ammonium metatungstate
    Patent number: 8435467
    Abstract: A process for preparing ammonium metatungstate using ammonium paratungstate as raw material comprising: (A) leaching wet ammonium paratungstate with nitric acid to obtain a dilute solution of ammonium metatungstate; (B) concentrating the dilute solution of ammonium metatungstate to be a concentrated solution of ammonium metatungstate; and (C) spray-drying the concentrated solution of ammonium metatungstate to obtain powder of ammonium metatungstate.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: May 7, 2013
    Assignee: Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation
    Inventor: Zhangqing Luo
  • PROCESS FOR PREPARING AMMONIUM METATUNGSTATE
    Publication number: 20120141359
    Abstract: A process for preparing ammonium metatungstate using ammonium paratungstate as raw material comprising: (A) leaching wet ammonium paratungstate with nitric acid to obtain a dilute solution of ammonium metatungstate; (B) concentrating the dilute solution of ammonium metatungstate to be a concentrated solution of ammonium metatungstate; and (C) spray-drying the concentrated solution of ammonium metatungstate to obtain powder of ammonium metatungstate.
    Type: Application
    Filed: December 30, 2009
    Publication date: June 7, 2012
    Inventor: Zhangqing Luo