Sumitomo Chemical Company, Limited

Nobufumi Watanabe

Masahiro Hoshino

Keisuke Sugita

Kohei Seki

Kazuaki Yoshimura

Keisuke Tanaka

Masashi Teramori

A method for producing &#x3b5;-caprolactam involves a step of Beckmann-rearranging cyclohexanone oxime in a gas phase in the presence of a zeolite catalyst containing silicon and at least one element selected from alkaline earth metal elements and magnesium. The concentration of the above-described element in the zeolite catalyst is 3 ppm by mass or more and 10000 ppm by mass or less.

Production method of &#x3f5;-caprolactam

An object of the present invention is to provide a method capable of producing a cycloalkanol and/or a cycloalkanone with a favorable selectivity coefficient by oxidizing a cycloalkane with a favorable conversion ratio. Disclosed is a method for producing a cycloalkanol and/or a cycloalkanone, which comprises oxidizing a cycloalkane with oxygen in the presence of a mesoporous silica which contains at least one transition metal and has been also subjected to contact treatment with an amine and/or ammonia. Preferably, a crystal obtained by mixing a compound containing the metal, a silicon compound, a structure-directing agent and water is subjected to contact treatment with an amine and/or ammonia and then fired to obtain a mesoporous silica, and a cycloalkane is oxidized with oxygen in the presence of the mesoporous silica.

Method for producing cycloalkanol and/or cycloalkanone

An object of the present invention is to provide a process capable of producing cycloalkanol and/or cycloalkanone with a favorable selectivity by oxidizing cycloalkane with a favorable conversion. Disclosed is a process for producing cycloalkanol and/or cycloalkanone, which comprises oxidizing cycloalkane with oxygen in the presence of mesoporous silica, wherein (1) the mesoporous silica contains at least one transition metal, and (2) a ratio of total volume of mesoporous silica particles having a particle diameter of 20 &#x3bc;m or less to total volume of entire mesoporous silica particles is 25% or more in the mesoporous silica.

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Niihama, Japan

Nobufumi Watanabe