Método para purificar un disolvente de nitrilo

• Main Authors: NAKASHIMA, Ryoyo, WADA, Ryoji, MATSUDA, Keiichiro, KOMATSU, Fuminori, SAITO, Shota
• Format: Patent
• Language: Spanish
• Published: 15.10.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

It is an object of the present invention to provide a method for manufacturing a higher purity nitrile solvent by purifying a nitrile solvent containing an imine, etc., as an impurity. In particular, it is an object to provide a method for manufacturing a higher purity nitrile solvent by purifying a nitrile solvent containing an imine and a conjugated diene, a carbonyl compound, or a high-boiling material as impurities. The present invention is a method for purifying a nitrile solvent, such as isobutyronitrile, comprising bringing a nitrile solvent containing an imine, etc., 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 the 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.