Patents by Inventor Tomoji Tsuji

Tomoji Tsuji 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 producing a urethane and a carbonic acid ester
    Patent number: 4976679
    Abstract: The present invention relates to a process for producing a urethane and a carbonic acid ester which comprises reacting a primary amine, an organic compound containing a hydroxyl group(s), carbon monoxide and molecular oxygen with one another by using a catalyst comprising mainly copper.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: December 11, 1990
    Inventors: Takashi Okawa, Nobuo Isogai, Tomoji Tsuji
  • Process for producing ethanol
    Patent number: 4678858
    Abstract: A process for producing ethanol which comprises reacting methanol, carbon monoxide and water in the presence of a catalyst comprising cobalt or a cobalt compound and a tertiary phosphine as an effective component is disclosed. A gaseous mixture obtained by burning heavy oil or coal having a relatively high content of carbon can be used as a raw material for producing ethanol.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: July 7, 1987
    Assignee: Agency of Industrial Science and Technology
    Inventors: Nobuo Isogai, Takashi Okawa, Motoyuki Hosokawa, Tomoji Tsuji, Natsuko Wakui
  • Process for producing xylyleneglycol
    Patent number: 4507510
    Abstract: Xylyleneglycol is produced by diazotization reaction of xylylenediamine in the presence of more than 5 parts by weight of water per 1 part of xylylenediamine, while maintaining the PH of the reaction mixture in the range of 1.5 to 5.0.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: March 26, 1985
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Shigeo Yoshinaka, Tsukasa Toki, Tomoji Tsuji, Seiji Uchiyama
  • Process for producing trimellitic acid
    Patent number: 4398040
    Abstract: Trimellitic acid is produced in higher yield by liquid phase air oxidation of pseudocumene in acetic acid as a solvent in the presence of cobalt, manganese, and bromine as a catalyst, where the oxidation is carried out at two stages comprising a first stage of reaction at a temperature of 110.degree. to 170.degree. C. and a second stage of reaction at a temperature of 180.degree. to 240.degree. C. while maintaining a reaction pressure under a condition of the following formula throughout the reaction:1.20 Psolv.ltoreq.P.ltoreq.2.20 Psolvwherein P represents a reaction pressure as absolute pressure and Psolv represents a total vapor pressure of acetic acid and water present in a reaction system at a given reaction temperature.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: August 9, 1983
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Takashi Suzuki, Koichi Kitahara, Susumu Naito, Tomoji Tsuji