Patents by Inventor Masukuni Sobukawa

Masukuni Sobukawa 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 simultaneously producing methacrylo-nitrile and butadiene by vapor-phase catalytic oxidation of mixed butenes
    Patent number: 4000176
    Abstract: This invention provides a process for simultaneously producing methacrylonitrile and butdiene which comprises contacting a mixture of mixed butenes containing isobutene and n-butenes, oxygen and ammonia as the substantial reactants with a catalyst containing as the active component a composition having the empirical formula Fe.sub.10 Sb.sub.5.sub.-60 Me.sub.0.01.sub.-10 -Te.sub.0.05.sub.-5 X.sub.0.sub.-5 O.sub.20.sub.-225 wherein Me is at least one element selected from the group consisting of V, Mo and W and X represents P and/or B in vapor phase.
    Type: Grant
    Filed: May 5, 1971
    Date of Patent: December 28, 1976
    Assignee: Nitto Chemical Industry Co., Ltd.
    Inventors: Takachika Yoshino, Shigeru Saito, Masukuni Sobukawa, Jun Ishikura, Yutaka Sasaki