Patents by Inventor Tadashi Takeshiro

Tadashi Takeshiro 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 recovering manganese values from a mixture obtained by catalytically oxidizing a paraffin with gaseous oxygen
    Patent number: 4008306
    Abstract: When paraffins having a chain of 10 - 40 carbon atoms are reacted with gaseous oxygen in the presence of a manganese bearing catalyst, manganese is present in the oxidation mixture partly as a solute in the liquid mixture, and partly as a sludge. When the oxidation mixture is extracted with a dilute mineral acid, practically the entire manganese values present in the mixture are found in the aqueous extract which is free of significant amounts of organic matter. When a more concentrated aqueous acid is used in the extraction, practically the entire manganese values present are converted to a precipitate which is readily recovered and may be dissolved in water for further processing.
    Type: Grant
    Filed: June 5, 1975
    Date of Patent: February 15, 1977
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takashi Yamashita, Tadashi Takeshiro