Patents by Inventor Tiejun Zhang

Tiejun 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 of making shaped activated carbon
    Publication number: 20030020198
    Abstract: A new shaped activated carbon and the method of its manufacture are disclosed. The invention resides in the crosslinking of a polymeric cellulose, such as sodium carboxymethylcellulose (CMC), within the carbon bodies after they are shaped, employing the CMC as a binder for the activated carbon. The approach to attain product mechanical strength and water stability by crosslinking rather than high temperature heat treatment is not obvious from the prior art teaching. The crosslinking reaction occurs at temperatures below 270° C. In addition, this new binder technology produces shaped carbon bodies having key properties beyond the best level that has been accomplished with other binders.
    Type: Application
    Filed: April 11, 2001
    Publication date: January 30, 2003
    Applicant: Westvaco Corporation
    Inventors: Peter D.A. McCrae, Tiejun Zhang, David R.B. Walker
  • Shaped activated carbon
    Patent number: 6472343
    Abstract: A new shaped activated carbon and the method of its manufacture are disclosed. The invention resides in the crosslinking of a polymeric cellulose, such as sodium carboxymethylcellulose (CMC), within the carbon bodies after they are shaped, employing the CMC as a binder for the activated carbon. The approach to attain product mechanical strength and water stability by crosslinking rather than high temperature heat treatment is not obvious from the prior art teaching. The crosslinking reaction occurs at temperatures below 270° C. In addition, this new binder technology produces shaped carbon bodies having key properties beyond the best level that has been accomplished with other binders.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: October 29, 2002
    Assignee: Westvaco Corporation
    Inventors: Peter D. A. McCrae, Tiejun Zhang, David R. B. Walker