Patents by Inventor Qiu Zhuxian

Qiu Zhuxian 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).

  • Activated carbon anode including lithium
    Patent number: 4885073
    Abstract: This invention relates to a lithum-containing carbon anode employed in the process of producing aluminum metal where the lithium compounds in an amount of 0.1 to 1.5 percent by weight were added into the carbon mass made of pitch and calcined coke to produce a Soderberg anode and carbon mass of prebaked anode. Compared with the ordinary carbon anode used in the production of aluminum, the anode overvoltage will be reduced about 100 to about 200 mV. Therefore, the energy consumption will be decreased by about 300 to about 600 Kwh. In addition, the current efficiency will be increased by 1 to 2 percent.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: December 5, 1989
    Assignees: Northeast University of Technology, Shandong Aluminum Works
    Inventors: Yao Guangchun, Qiu Zhuxian, Nu Z. Wu