Mitsui Chemicals, Inc.

Nobuhiko Horiuchi

Kenichi Sugimoto

Kenji Iwata

Masami Murakami

Takashi Nabeta

Yoshihiro Kubota

Satoru Miyazoe

Satoshi Inagaki

Akihiro Okabe

Yoshiya Matsukawa

The method for manufacturing a modified aluminosilicate includes a first step of treating an aluminosilicate with an acid, a second step of primarily calcining the treated material obtained in the first step at 550&#xb0; C. to 850&#xb0; C., and a third step of contacting the calcined material obtained in the second step with a liquid containing one or more Group 4 elements and/or Group 5 elements, and then drying and secondarily calcining the resultant. The modified aluminosilicate includes one or more Group 4 elements and/or Group 5 elements, and exhibits an absorbance at 300 nm in an ultraviolet visible spectrum of 1.0 or higher. The method for manufacturing aromatic dihydroxy compounds includes reacting a phenol with hydrogen peroxide in the presence of a specific modified aluminosilicate.

Method for manufacturing modified aluminosilicate, modified aluminosilicate, and method for manufacturing aromatic dihydroxy compound using the same

The invention provides a chlorine production catalyst that shows excellent reaction activity in the oxidation reaction of hydrogen chloride with oxygen into chlorine, is inexpensive and can be supplied stably, and is suited for use in a fluidized-bed reactor. The invention also provides a chlorine production process using the catalyst. The chlorine production catalyst of the invention includes spherical particles containing copper element (A), an alkali metal element (B) and a lanthanoid element (C) and having an average sphericity of not less than 0.80. The lanthanoid element (C) has a bond dissociation energy with oxygen at 298 K of 100 to 185 kcal/mol. The content of the copper element (A) in the catalyst is 0.3 wt % to 4.5 wt %.

Chlorine production catalyst and chlorine production process using the catalyst

A catalyst has high activity and is suitable for use in producing chlorine by oxidizing hydrogen chloride with oxygen. The catalyst includes copper, an alkali metal and a rare earth and has pores of which pores having a diameter of 5 to 15 nm have a pore volume of 0.4 to 2.0 ml/g.

Catalyst and production process thereof, and chlorine production using the catalyst

Disclosed is a photocatalyst comprising a photocatalytically active base, and a silicon oxide film covering the base and substantially having no pores. The alkali metal content of the photocatalyst is not less than 1 ppm but not more than 1,000 ppm. Also disclosed is a method for producing such a photocatalyst wherein when a photocatalytically active base present in an aqueous medium is coated with a silicon oxide film by using a silicate, the pH of the aqueous medium containing both the photocatalytically active base and the silicate is maintained at 5 or below.

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Chiba, Japan

Nobuhiko Horiuchi