Patents by Inventor Kazuhiko Sekizawa

Kazuhiko Sekizawa 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 methacrolein
    Patent number: 4250339
    Abstract: Methacrolein is produced by a vapor phase oxidation of isobutylene or tertiary butanol in the presence of a complex oxide catalyst having the formulaMo.sub.a Co.sub.b Fe.sub.c Bi.sub.d Tl.sub.e X.sub.f Y.sub.g Z.sub.h O.sub.iwherein X represents V and/or Nb; Y represents La and/or Ce; and Z represents Cs and/or Te and a, b, c, d, e, f, g, h and i represent atomic ratios wherein a=12; b=3 to 15; c=0.4 to 5; d=0.4 to 5; e=0.01 to 2; f=0.01 to 2; g=0 to 2; h=0 to 2; and i is determined by the valences of the non-oxygen components of the catalyst and is usually in a range of 40 to 79.
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: February 10, 1981
    Assignee: Toyo Soda Manufacturing Co., Ltd.
    Inventors: Teruhisa Sakamoto, Kazuhiko Sekizawa, Keiichi Kihara