Biocatalyst solvent using ionic liquid, and biocatalyst solution containing biocatalyst and said solvent

Abstract

There is provided a biocatalyst solvent which is capable of dissolving a biocatalyst in a liquid state while maintaining the activity of the biocatalyst at a high concentration from a low temperature to a high temperature, and is capable of storing the biocatalyst for a long time period; and a biocatalyst solution using the biocatalyst solvent. Disclosed is a biocatalyst solvent which consists of an ionic liquid including a quaternary ammonium cation represented by the following Formula (I) and an anion:[Chemical Formula 1]N[R][R]  (I)wherein R's each independently represent a hydroxyalkyl group having one or more hydroxyl groups and an a linear or branched alkyl moiety having 1 to 10 carbon atoms, in which the alkyl moiety may contain an oxygen atom; a carboxyalkyl group having one or more carboxyl groups and a linear or branched alkyl moiety having 1 to 10 carbon atoms, in which the alkyl moiety may contain an oxygen atom; or a hydroxycarboxyalkyl group having one or more hydroxyl groups, one or more carboxyl groups and a linear or branched alkyl moiety having 1 to 10 carbon atoms, in which the alkyl moiety may contain an oxygen atom; R's each independently represent a hydrogen atom, or a linear or branched alkyl group having 1 to 5 carbon atoms; and n represents an integer from 1 to 4.