Patents by Inventor Peiping Zhang

Peiping Zhang 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 metallurgical-grade alumina by using fluidized bed fly ash
    Patent number: 8568671
    Abstract: Provided a method for preparing metallurgical-grade alumina by using fluidized-bed fly ash, comprising: a) removing iron by wet magnetic separation after crushing the fly ash; b) reacting the fly ash after magnetic separation with hydrochloric acid to obtain a hydrochloric leachate; c) passing the hydrochloric leachate through macro-porous cationic resin to deeply remove iron to obtain a refined aluminum chloride solution; d) concentrating and crystallizing the refined aluminum chloride solution to obtain an aluminum chloride crystal; and e) calcining the aluminum chloride crystal to obtain the metallurgical-grade alumina. The method is simple, the procedure is easy to be controlled, the extraction efficiency of alumina is high, the production coast is low, and the product quality is steady.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: October 29, 2013
    Assignee: China Shenhua Energy Company Limited
    Inventors: Zhaohua Guo, Cundi Wei, Peiping Zhang, Jianguo Han, Junzhou Chi, Yanbin Sun, Yixin Zhao
  • METHOD FOR PREPARING METALLURGICAL-GRADE ALUMINA BY USING FLUIDIZED BED FLY ASH
    Publication number: 20130115149
    Abstract: Provided a method for preparing metallurgical-grade alumina by using fluidized-bed fly ash, comprising: a) removing iron by wet magnetic separation after crushing the fly ash; b) reacting the fly ash after magnetic separation with hydrochloric acid to obtain a hydrochloric leachate; c) passing the hydrochloric leachate through macro-porous cationic resin to deeply remove iron to obtain a refined aluminum chloride solution; d) concentrating and crystallizing the refined aluminum chloride solution to obtain an aluminum chloride crystal; and e) calcining the aluminum chloride crystal to obtain the metallurgical-grade alumina. The method is simple, the procedure is easy to be controlled, the extraction efficiency of alumina is high, the production coast is low, and the product quality is steady.
    Type: Application
    Filed: April 27, 2011
    Publication date: May 9, 2013
    Applicant: CHINA SHENHUA ENERGY COMPANY LIMITED
    Inventors: Zhaohua Guo, Cundi Wei, Peiping Zhang, Jianguo Han, Junzhou Chi, Yanbin Sun, Yixin Zhao