Nippon Soda Co., Ltd.

Masamichi Yasuhara

Satoru Yamazaki

Hideki Maekawa

Kimihiko Oohata

Kenichi Hayashi

Makoto Toyooka

Minoru Okada

Jyunichi Kawachi

Ken-ichi Hayashi

Ken-Ichi Hayashi

The present invention provides a method for producing a disulfonylamine alkali metal salt, including a step of subjecting a disulfonylamine onium salt represented by formula [I] (wherein each of Rand Rindependently represents a fluorine atom or a fluorinated alkyl group having 1 to 6 carbon atoms, provided that at least one of Rand Rrepresents a fluorine atom, and each of R, R, Rand Rindependently represents a hydrogen atom or the like) to a cation exchange reaction in an organic solvent, thereby producing a disulfonylamine alkali metal salt represented by formula [II] (wherein Mrepresents an alkali metal cation, and Rand Rare as defined in formula [I]), and a step of filtering the organic solvent solution containing the disulfonylamine alkali metal salt through a filter having a particle retention size of 0.1 to 10 &#x3bc;m to obtain a filtrate. 

Method for producing disulfonylamine alkali metal salt

The present invention provides a polydialkylsilane, and a method for producing a polydialkylsilane, including a step of adding a compound represented by formula (I) (in formula (I), Rand Rindependently represent an alkyl group, and Xand Xindependently represent a halogen atom) to an organic solvent containing an alkali metal, in which 0.010 [hr]&#x2266;the average addition rate of compound (I) [moles&#xb7;hr]/the amount of the alkali metal [moles]&#x2266;0.055 [hr]. 

Method for producing polydialkylsilane

A method for easily producing high-purity polydimethylsilane or polydiphenylsilane, where by-products such as alkali metal salt and alkaline earth metal salt can be efficiently removed, is provided. Dimethyldichlorosilane or diphenyldichlorosilane is reacted with an alkali metal such as metal sodium and metal magnesium and/or an alkaline earth metal in an organic solvent such as toluene to obtain crude polydimethylsilane or crude polydiphenylsilane, methanol having dissolved therein an ether ester-type nonionic surfactant or a surfactant such as alkylbenzenesulfonate is added to the crude polydimethylsilane or the crude polydiphenylsilane to deactivate the remaining alkali metal and alkaline earth metal, and the crude polydimethylsilane or the crude polydiphenylsilane is washed with water in the presence of a surfactant to efficiently remove an alkali metal salt, an alkaline earth metal salt and the like, whereby high-purity polydimethylsilane or polydiphenylsilane is obtained.

Process for production of polysilane compound

The present invention relates to: a process for producing a cyclic silane compound, which comprises subjecting a chained polysilane to pyrolysis in the presence of an oxide of a transition metal belonging to Group 8 or Group 11 of the periodic table; and a process for producing a cyclic carbosilane compound, which comprises subjecting a chained polysilane to pyrolysis in the presence of a simple substance of a metal selected from the group consisting of transition metal elements and elements belonging to Groups 12 to 15 of the periodic table or a compound thereof.

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Myoukou, Japan

Masamichi Yasuhara