Patents by Inventor Yohio Ishii

Yohio Ishii 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 rhodium compounds
    Patent number: 4397788
    Abstract: This invention relates to rhodium compounds having the general formula:HRh(CO)(XR.sub.3).sub.n (YR'.sub.3).sub.3-nwherein X is phosphorus, arsenic or antimony; Y is arsenic or antimony when X is phosphorus, Y is phosphorus or antimony when X is arsenic, or Y is phosphorus, arsenic or antimony when X is antimony; R and R' are aryl groups; and n is an integer of 1 or 2. Further, it relates to a process for the preparation of aldehydes by the hydroformylation of olefins in the presence of a rhodium catalyst, and more particularly for the production of aldehydes by the reaction of olefins such as propylene with carbon monoxide and hydrogen in the presence of HRh(CO)PPh.sub.3).sub.2 (AsPh.sub.3)/excess PPh.sub.3 and AsPh.sub.3 or HRh(CO)(PPh.sub.3)(AsPh.sub.3).sub.2 /excess PPh.sub.3 and AsPh.sub.3.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: August 9, 1983
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Tadamori Sakakibara, Yoshihisa Matsushima, Yukio Nagashima, Nobukazu Okamoto, Katsumi Kaneko, Yohio Ishii, Shozo Wada
  • Novel rhodium compounds and process for producing the same
    Patent number: 4288634
    Abstract: This invention relates to rhodium compounds having the general formula:HRh(CO)(XR.sub.3).sub.n (YR'.sub.3).sub.3-nwherein X is phosphorus, arsenic or antimony; Y is arsenic or antimony when X is phosphorus, Y is phosphorus or antimony when X is arsenic, or Y is phosphorus, arsenic or antimony when X is antimony; R and R' are aryl groups; and n is an integer of 1 or 2. Further, it relates to a process for the preparation of aldehydes by the hydroformylation of olefins in the presence of a rhodium catalyst, and more particularly for the production of aldehydes by the reaction of olefins such as propylene with carbon monoxide and hydrogen in the presence of HRh(CO)(PPh.sub.3).sub.2 (AsPh.sub.3)/excess PPh.sub.3 and AsPh.sub.3 or HRh(CO)(PPh.sub.3)(AsPh.sub.3).sub.2 /excess PPh.sub.3 and AsPh.sub.3.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: September 8, 1981
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Tadamori Sakakibara, Yoshihisa Matsushima, Yukio Nagashima, Nobukazu Okamoto, Katsumi Kaneko, Yohio Ishii, Shozo Wada