Patents by Inventor Majid N. Keyvani

Majid N. Keyvani 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).

  • Removal of dinitrotoluene from process water
    Patent number: 5763696
    Abstract: Reduction of dinitrotoluene impurity in water is achieved by distillation in the presence of nitric acid. A suitable process for such reduction comprises (a) contacting said composition with nitric acid to provide a nitric acid-containing composition, (b) distilling at least a portion of said water in said nitric acid-containing composition to provide vaporized water containing a reduced concentration of said dinitrotoluene, and (c) separating said vaporized water from said nitric acid-containing composition.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: June 9, 1998
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Allen B. Quakenbush, Majid N. Keyvani, Michael C. Fullington, James L. Meyer