Patents by Inventor Yoichi Imbe

Yoichi Imbe 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).

  • Catalyst for decarbonylation reaction
    Patent number: 5892091
    Abstract: A catalyst composed of an organic phosphorus compound having a trivalent or pentavalent phosphorus atom and at least one carbon-phosphorus bonding or a combination of the organic phosphorus compound and a halogen atom-containing compound is effective for decarbonylation, that is, for releasing carbon monoxide from a compound containing a moiety of --CO--CO--O-- in its molecular structure.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: April 6, 1999
    Assignee: Ube Industries, Ltd.
    Inventors: Katsumasa Harada, Yoichi Imbe, Keigo Nishihira, Shuji Tanaka, Satoru Fujitsu, Ryoji Sugise, Koichi Kashiwagi, Toshihiko Sumida, Takashi Doi, Masayuki Nishio
  • Process for preparing diaryl carbonate
    Patent number: 5892089
    Abstract: A process for preparing a diaryl carbonate from a diaryl oxalate in a liquid phase by decarbonylation is conducted by the steps of:1) performing a decarbonylation reaction of a diaryl oxalate in the presence of an organic phosphorus compound catalyst to give a reaction mixture of a diaryl carbonate and the organic phosphorus compound catalyst;2) recovering the diaryl carbonate from the reaction mixture; and3) performing a decarbonylation reaction of a diaryl oxalate in the presence of the reaction mixture from which the diaryl carbonate has been recovered and to which a halogen atom-containing compound is added, to give a reaction mixture of a diaryl carbonate and the organic phosphorus compound catalyst.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: April 6, 1999
    Assignee: Ube Industries, Ltd.
    Inventors: Katsumasa Harada, Ryoji Sugise, Koichi Kashiwagi, Yoichi Imbe, Takashi Doi, Keigo Nishihira, Shuji Tanaka, Hirofumi Ii
  • Process for preparation of diaryl carbonate
    Patent number: 5648510
    Abstract: A diaryl carbonate is prepared at a high yield and a high selectivity by heating a diaryl oxalate in the presence of an organic phosphorous compound to release carbon monoxide therefrom. A halogen atom-containing compound can be employed in combination with the organic phosphorous compound.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: July 15, 1997
    Assignee: Ube Industries, Ltd.
    Inventors: Katsumasa Harada, Yoichi Imbe, Keigo Nishihira, Shuji Tanaka, Satoru Fujitsu, Ryoji Sugise, Koichi Kashiwagi, Toshihiko Sumida