Patents by Inventor Ching T. Chi

Ching T. Chi 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).

  • Decontamination of KA oil refinement waste stream
    Patent number: 4450291
    Abstract: A process for the decontamination of the distillation refinement residue from the process of oxidizing cyclohexane to KA oil is provided. The process comprises washing the distillation refinement residue with the crystallization by-product obtained in crystallizing adipic acid from the product stream of the process of oxidizing the KA oil with a strong acid. This crystallization residue comprises residual amounts of the strong acid and adipic acid, as well as substantial amounts of glutaric acid and succinic acid.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: May 22, 1984
    Assignee: Monsanto Company
    Inventors: Ching T. Chi, J. Harvey Lester, Jr.