Patents by Inventor Ching-Chyi Chen

Ching-Chyi Chen 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 separating iron from nickel and/or cadmium from a waste containing the same
    Patent number: 5728854
    Abstract: A method for separating iron for nickel and/or cadmium contained in a battery waste is composed of a first step in which the spent batteries are crushed and calcined. The calcined pieces are mixed with an acetic acid aqueous solution before acetic acid and water are removed by evaporation or distillation so as to produce a residue containing metallic acetates. Water, the residue and an oxidant are mixed such that Fe.sup.+ and Fe.sup.++ acetates are converted into a basic ferric acetate, Fe(CH.sub.3 COO).sub.2 OH, which is insoluble in water and is recovered by filtration.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: March 17, 1998
    Assignee: Industrial Technology Research Institute
    Inventors: Ching-Chyi Chen, Fong-Ru Yang