Sumitomo Chemical Company, Limited

Masahito Sekiguchi

Kenji Saito

Kazuya Minamisaka

Naoki Inui

Taketoshi Kikuchi

Kazuhiko Takahashi

Shinzaburo Masaki

Tamon Itahashi

Hiroshi Shiratani

Shin Tanaka

Yasuo Uekita

Hiroshi Yoshihara

Takashi Kawai

A process for producing particles, the process including pulverizing particles of a compound represented by formula (I) with a median diameter (50% D) of over 100 &#x3bc;m by using a pulverizer in the presence of at least one member selected from the group consisting of silica, talc and clay, to obtain particles of the compound represented by formula (I) with a median diameter (50% D) of 100 &#x3bc;m or less, in formula (I), Rand Reach independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or alternatively, Rand Rare inked to each other to form a ring together with the nitrogen atom to which they are bound, m represents an integer of 2 to 9, Mrepresents Hor an n-valent metal ion, and n represents an integer of 1 or 2.

Process for producing particles

An electric double-layer capacitor comprising an electrode containing an activated carbon, an electrolytic solution containing an electrolyte and a separator, wherein the electrolyte is an imidazolium salt represented by the following formula (1) 

Electric double layer capacitor

4-tert.-Butylcyclohexanol having a larger content of its cis-isomer is prepared by hydrogenating 4-tert.-butylphenol in a solvent in the presence of a rhodium catalyst and a compound selected from the group consisting of hydrogen chloride and (anhydrous) sulfuric acid. Furthermore, 4-tert.-butylcyclohexanol obtained by the above hydrogenation is acetylated to give 4-tert.-butylcyclohexyl acetate.

Processes for preparing 4-tert.-butylcyclohexanol and

The process for producing 5-amino-3-methylpyrazole includes the steps of reacting 2,3-dichloropropene with a cyanogenating agent in the presence of a cuprous salt and water at a pH of 3-8 to obtain at least one intermediate selected from the group consisting of 3-chloro-3-butenonitrile and 2,3-butadienenitrile; reacting the at least one intermediate with a base in the presence of water at a pH of 12.5 or above to obtain 2-butynenitrile; and reacting the 2-butynenitrile with hydrazine. This process is advantageous in that it enables the production of 5-amino-3-methylpyrazole in high yield without using any reagent which may produce fire. 5-Amino-3-methylpyrazole is a useful intermediate for medicines, agricultural chemicals, photographic chemicals, etc.

Process for production of 5-amino-3-methylpyrazole

Process for producing 5-amino-3-methylpyrazole

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Osaka, Japan

Masahito Sekiguchi