Patents by Inventor Akira Taguro

Akira Taguro 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).

  • Process for preparing nitriles
    Patent number: 4778890
    Abstract: A heteroaromatic nitrile is prepared in a high selectivity and yield by catalytically reacting an alkyl-substituted heteroaromatic compound with molecular oxygen and ammonia in a molar ratio of oxygen to ammonia of not larger than 1.6:1 in a gaseous phase in the presence of a catalyst comprising a vanadium-phosphorus oxide of the formula:VP.sub.x Sb.sub.y O.sub.z (I)wherein x, y and z represent atomic ratios of phosphorus, antimony and oxygen to vanadium, respectively, and x is from 0.1 to 5, y is 0 to 8 and z is defined from the valencies of other elements.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: October 18, 1988
    Assignee: Koei Chemical Co., Ltd.
    Inventors: Shinkichi Shimizu, Takayuki Shoji, Nobuyuki Abe, Masanori Doba, Akira Taguro, Akira Iguchi, Toru Nakaishi
  • Process for treating aqueous solutions containing phenols
    Patent number: 4418221
    Abstract: In removing a phenol from an aqueous solution containing the phenol, the phenol could be extracted quite effectively regardless of concentration of the phenol by using, as extracting solvent, a nitrogen-containing heterocyclic compound having a total carbon number of 9 or more either alone or in the state of a dilution with a water-insoluble organic solvent.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: November 29, 1983
    Assignee: Koei Chemical Co., Ltd.
    Inventors: Sinichi Yasuda, Takayuki Kurohara, Akira Taguro