Ube Industries, Inc.

Takashi Atoguchi

Shigeru Yao

Tomonori Kanougi

Yoshihisa Kakuta

Disclosed are a proton type &#x3b2; zeolite in which an acid site showing a desorption peak with a range of &#xb1;100&#xb0; C. with a center of 330&#xb0; C. exists in a spectrum measured by the ammonia temperature programmed desorption method (NH-TPD), and an amount of a strong acid site showing a desorption peak of 500&#xb0; C. or higher is controlled to 2.5 &#x3bc;mol/g or less, a method for preparing the same, and a process for preparing a phenol compound by oxidizing a benzene compound with a peroxide in the presence of the proton type &#x3b2; zeolite.

Proton type &#x3b2;  zeolite, preparation method thereof and process for preparing phenol compound using the same

A process for producing a zirconium oxide precursor comprising precipitating a zirconium oxide precursor from an alcoholic solution of a zirconium compound, and a process for producing zirconium oxide having infrared absorption peaks assigned to an S&mdash;O bond between 1010 cm and 1025 cm and between 1035 cm and 1050 cm , which comprises heat treating the zirconium oxide precursor prepared by the above process. The zirconium oxide precursor and the zirconium oxide obtained in the process are effective as a catalyst for removing or decomposing nitrogen oxides.

Zirconium oxide and zirconium oxide precursor and process for producing them

There are disclosed a process for producing a dihydric phenol which comprises oxidizing a monohydric phenol by a peroxide compound in the presence of a &bgr;-zeolite, a ketone and a phosphoric acid, and a process for producing a dihydric phenol which comprises oxidizing a monohydric phenol in the presence of a &bgr;-zeolite, a ketone and a phosphoric acid, by feeding a monohydric phenol, hydrogen peroxide, a ketone and a phosphoric acid into a reactor in which a &bgr;-zeolite is charged, to oxidize the monohydric phenol into a dihydric phenol, and delivering the resultant reaction mixture from the reactor.

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Ichihara, Japan

Takashi Atoguchi