Patents by Inventor Noboru Hirooka

Noboru Hirooka 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 the production of carboxylic anhydrides
    Patent number: 5252752
    Abstract: A process for the production of carboxylic anhydrides from aromatic hydrocarbons in gas phase oxidation by using a high activity and high selectivity fluid catalyst, comprising 50 to 95% by weight calculated as TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3 of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and5 to 50% by weight calculated as V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal) +SO.sub.3 of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of 0.02 to 0.5 and 0.25 to 1.0, respectively, is provided.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: October 12, 1993
    Assignee: Kawasaki Steel Corporation
    Inventors: Toshinao Aono, Yukio Asami, Noboru Hirooka, Yusaku Arima, Susumu Fujii
  • Fluid catalyst for use in gas phase oxidation of aromatic hydrocarbons
    Patent number: 5185309
    Abstract: A high activity and high selectivity fluid catalyst for use in gas phase oxidation of aromatic hydrocarbons, comprising 50 to 95% by weight (calculated by TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3) of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and 5 to 50% by weight [calculated by V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal)+SO.sub.3 ] of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of from 0.02 to 0.5 and from 0.25 to 1.0, respectively, is provided.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: February 9, 1993
    Assignee: Kawasaki Steel Corp.
    Inventors: Toshinao Aono, Yukio Asami, Noboru Hirooka, Yusaku Arima, Susumu Fujii