Abstract: Provided are a high-purity vinylene carbonate that is a vinylene carbonate having the content of chlorine impurities of substantially zero as detected by the Wickbold combustion-ion chromatography method and having a Hazen unit color number of 10 or less in a nitrogen atmosphere, a nonaqueous electrolytic solution containing the high-purity vinylene carbonate, and an energy storage device using the same.

Abstract: (1) A container for a nonaqueous electrolytic solution, containing a material containing an aluminum or aluminum alloy layer, and storing a nonaqueous electrolytic solution containing a nonaqueous solvent having dissolved therein an electrolyte salt, the container having a cap and a plug each formed of a resin, and maintaining the nonaqueous electrolytic solution to have a water content of 50 ppm or less after storing in the container for 30 days, (2) a nonaqueous electrolytic solution placed in the container, and (3) a method for storing a nonaqueous electrolytic solution. The container for a nonaqueous electrolytic solution is a light weight container that prevents the nonaqueous electrolytic solution from being decomposed on storing to maintain the high quality, and facilitates and ensures the handling of the nonaqueous electrolytic solution.

Abstract: An asymmetric chain carbonate can be produced in a single-step reaction comprising a step of reacting methyl nitrite, carbon monoxide, and 0.05-1.5 moles of an aliphatic alcohol having 2-6 carbon atoms or an alicyclic alcohol having 5-6 carbon atoms per one mole of methyl nitrile in a gaseous phase in the presence of a solid catalyst comprising a platinum group metal or a compound thereof placed on a support.

Abstract: (1) A container for a nonaqueous electrolytic solution, containing a material containing an aluminum or aluminum alloy layer, and storing a nonaqueous electrolytic solution containing a nonaqueous solvent having dissolved therein an electrolyte salt, the container having a cap and a plug each formed of a resin, and maintaining the nonaqueous electrolytic solution to have a water content of 50 ppm or less after storing in the container for 30 days, (2) a nonaqueous electrolytic solution placed in the container, and (3) a method for storing a nonaqueous electrolytic solution. The container for a nonaqueous electrolytic solution is a light weight container that prevents the nonaqueous electrolytic solution from being decomposed on storing to maintain the high quality, and facilitates and ensures the handling of the nonaqueous electrolytic solution.

Abstract: An asymmetric chain carbonate can be produced in a single-step reaction comprising a step of reacting methyl nitrite, carbon monoxide, and 0.05-1.5 moles of an aliphatic alcohol having 2-6 carbon atoms or an alicyclic alcohol having 5-6 carbon atoms per one mole of methyl nitrile in a gaseous phase in the presence of a solid catalyst comprising a platinum group metal or a compound thereof placed on a support.

Abstract: Disclosed is a nonaqueous electrolytic solution useful for producing a lithium secondary battery having excellent cycle characteristics. Specifically disclosed is a nonaqueous electrolytic solution for lithium secondary batteries obtained by dissolving an electrolyte salt in a nonaqueous solvent which is characterized by containing 0.1 to 10 wt. % of a tert-alkylbenzene compound and also containing 0.001-0.5 wt. % of a benzene compound, wherein a hydrocarbon group having 1-4 carbon atoms is bonded to a benzene ring via the tertiary carbon atom, relative to the tert-alkylbenzene compound.

Abstract: Disclosed is a nonaqueous electrolytic solution useful for producing a lithium secondary battery having excellent cycle characteristics. Specifically disclosed is a nonaqueous electrolytic solution for lithium secondary batteries obtained by dissolving an electrolyte salt in a nonaqueous solvent which is characterized by containing 0.1 to 10 wt. % of a tert-alkylbenzene compound and also containing 0.001-0.5 wt. % of a benzene compound, wherein a hydrocarbon group having 1-4 carbon atoms is bonded to a benzene ring via the tertiary carbon atom, relative to the tert-alkylbenzene compound.

Abstract: An electrolysis solution for electrolytic capacitors including an aqueous organic solvent consisting of water and a water-compatible organic solvent and 1,6-decane-dicarboxylic acid or salt thereof dissolved therein. The solution further contains one or more additives selected from dinitriles, pivalic acid and salts thereof, diesters, alkylated lactones, cyanoalkanoic esters, monocarbboxylic acids each having a C3-7 alkyl chain and substituted with two C1-4 alkyl groups at the &bgr;-position to the carboxyl group and salts thereof, monocarboxylic acids each having C3-7 alkyl chain and substituted with one ethyl group at the &agr;-position to the carboxyl group and salts thereof, and monocarboxylic acids derived from cyclic saturated compounds each having five or six ring-constituting carbon atoms and salts thereof.

Abstract: An electrolysis solution for electrolytic capacitors comprising an aqueous organic solvent consisting of water and a water-compatible organic solvent and 1,6-decanedicarboxylic acid or a salt thereof dissolved therein, which solution further contains one or more additives selected from the group consisting of dinitriles, pivalic acid and salts thereof, diesters, alkylated lactones, cyanoalkanoic esters, monocarboxylic acids each having a C3-7 alkyl chain and being substituted with two C1-4 alkyl groups at the &bgr;-position to the carboxyl group and salts thereof, monocarboxylic acids each having a C3-7 alkyl chain and being substituted with one ethyl group at the &agr;-position to the carboxyl group and salts thereof, and monocarboxylic acids derived from cyclic saturated compounds each having five or six ring-constituting carbon atoms and salts thereof.

Abstract: An electrolyte for a lithium secondary battery comprising (i) a non-aqueous solvent, especially consists essentially of a high dielectric solvent and a low viscosity solvent, and (ii) an electrolyte salt, dissolved therein and (iii) an alkyne derivative or an alkyne carbonate derivative and also a lithium secondary battery using the same are disclosed.