Patents by Inventor Yasuyoshi Yamazaki

Yasuyoshi Yamazaki 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).

  • Novel zeolite catalyst and method of preparing
    Patent number: 4636482
    Abstract: A zeolite material obtained by modifying a crystalline aluminosilicate having the following empirical formula:xM.sub.2 O.yM'O.Al.sub.2 O.sub.3.zSiO.sub.2.nH.sub.2 Owherein M is an exchangeable cation selected from the group consisting of alkali metals, hydrogen and mixtures thereof, M' is an alkaline earth metal, x is between 0 and 1.5, y is between 0.2 and 40, z is between 50 and 3000 and n is between 0 and 40 and wherein x+y is at least 1.2, with an alkaline earth metal compound. The modifying may be by impregnation or by mere mixing. The zeolite material is useful as catalyst for converting methanol and/or dimethyl ether into lower olefins.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: January 13, 1987
    Assignee: Director-General of Agency of Industrial Science & Technology
    Inventors: Hideo Okado, Hiroshi Shoji, Haruo Takaya, Kichinari Kawamura, Yasuyoshi Yamazaki
  • Crystalline zeolite, method of preparing same and process for the production of olefins using same as catalyst
    Patent number: 4544793
    Abstract: A crystalline aluminosilicate having the following empirical formula:xM.sub.2 O.yM'O.Al.sub.2 O.sub.3.zSiO.sub.2.nH.sub.2 Owherein M is an exchangeable cation selected from the group consisting of alkali metals, hydrogen and mixtures thereof, M' is an alkaline earth metal, x is between 0 and 1.5, y is between 0.2 and 40, z is between 12 and 3000 and n is between 0 and 40 and wherein x+y is 1.2 or more, said aluminosilicate having the X-ray diffraction lines of Table 1 of the specification. The crystalline aluminosilicate material is obtained by providing a reaction mixture containing water, a tetrapropylammonium compound and a source of an alkali metal oxide, an oxide of silicon, an oxide of aluminum and an oxide of an alkaline earth metal and having a composition falling within the following ranges:SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio: 12-3000OH.sup.- /SiO.sub.2 molar ratio: 0.02-10H.sub.2 O/SiO.sub.2 molar ratio: 1-1000tetrapropylammonium ion/SiO.sub.2 molar ratio: 0.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: October 1, 1985
    Assignee: Director-General of Agency of Industrial Science and Technology
    Inventors: Hideo Okado, Kazuo Hashimoto, Kichinari Kawamura, Yasuyoshi Yamazaki, Haruo Takaya