Patents by Inventor Tomio Harada

Tomio Harada 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).

  • Distilling H.sub.2 O from aromatic carboxylic acid at a pH exceeding 9
    Patent number: 3989600
    Abstract: A process for treating an aqueous solution containing organic compounds and having a high chemical oxygen demand (COD) by distilling the aqueous solution at a pH not lower than 9, and recovering the water of low chemical oxygen demand (COD) from said aqueous solution. The aqueous solution containing the organic compounds to be treated is derived from the reaction mixture of the oxidation system of methyl-substituted aromatic compound in the liquid phase with molecular oxygen or a molecular oxygen-containing gas, in the presence of a heavy metal catalyst but in the substantial absence of a lower aliphatic acid solvent, to form the corresponding aromatic acid.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: November 2, 1976
    Assignee: Teijin Hercules Chemical Co., Ltd.
    Inventors: Satoshi Takahashi, Tomio Harada, Koshi Namie, Hiroshi Shirahige, Masayuki Sakurai