Nippon Soda Co., Ltd.

Keiichiro Matsuda

Kaoru Noda

Fuminori Komatsu

Satoshi Kajita

Masayuki Matsushita

Shota Saito

Ryoji Wada

Ryoyo Nakashima

A method for manufacturing a higher purity nitrile solvent by purifying a nitrile solvent containing an impurity, e.g an imine. The nitrile solvent may contain an imine and a conjugated diene, a carbonyl compound, or a high-boiling material as impurities. A method for purifying a nitrile solvent, such as isobutyronitrile, including bringing nitrile solvent containing an imine, e.g., as an impurity, into contact with an acidic aqueous solution having a pH of 3 or less, such as hydrochloric acid; bringing the nitrile solvent having been contacted with acidic aqueous solution into contact with an aqueous sodium hydrogen sulfite solution; bringing the nitrile solvent having been contacted with the aqueous sodium hydrogen sulfite solution into contact with an alkaline aqueous solution, such as an aqueous sodium hydroxide solution; and distilling the nitrile solvent having been contacted with the alkaline aqueous solution.

Method for purifying nitrile solvent

The present invention provides a compound characterized by being represented by general formula (I): (wherein, A represents a halogen atom, alkyl group, haloalkyl group, alkoxy group, haloalkoxy group, alkylsulfonyl group, unsubstituted or substituted aryl group, cyano group or nitro group, n represents an integer of 0 to 5 (and A may be mutually the same or different when n is 2 or more), Y represents an alkyl group, M represents an alkaline metal or alkaline earth metal, and m represents an integer of 1 or 2).

Compound, method for producing compound, and method for purifying compound

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Toyama, Japan

Keiichiro Matsuda