Patents by Inventor Gilbert E. Klingman

Gilbert E. Klingman 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 oxidation of p-xylene and method for preparing dimethylterephthalate
    Patent number: 4342876
    Abstract: A novel vertical induced circulation reactor is utilized to carry out the oxidation of p-xylene and p-methyltoluate with air in the presence of a catalyst to produce p-toluic acid and monomethylterephthalate (MMT). A novel method for preparation of dimethylterephthalate (DMT) is provided wherein the p-toluic acid and MMT formed according to the invention are esterified by conventional means in the presence of methanol to produce p-methyl toluate and dimethylterephthalate (DMT), respectively, the p-methyl toluate being recycled to the reactor as a reactant stream.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: August 3, 1982
    Assignee: Bechtel International Corporation
    Inventor: Gilbert E. Klingman