HIGH-PURITY ACETONITRILE AND PROCESS FOR PRODUCING THE SAME

摘要

A process for producing high-purity acetonitrile having a low absorbance at a wavelength of 200 nm. It requires a reduced amount of energy for purification and the purification step is simple. It considerably diminishes the propionitrile contained in acetonitrile. The process for high-purity acetonitrile production is characterized by mixing hydrous crude acetonitrile with an alkali, separating the mixture into an acetonitrile phase and an aqueous phase, removing the aqueous phase, subjecting the resultant acetonitrile phase to a distillation step to obtain purified acetonitrile, and passing the resultant purified acetonitrile through an cation-exchange resin to obtain high-purity acetonitrile.