| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producingα-amino-ε-caprolactam from lysine or a salt thereof by using a nonpolar solvent which is easily recovered and recycled in place of a polar solvent such as an alcohol. <P>SOLUTION: The problem is solved by the method for producingα-amino-ε-caprolactam, in which lysine or a salt thereof is dehydrated and cyclized in the presence of the mixed solvent of the nonpolar solvent and water kept at a temperature of 200-400°C and a pressure of 5-40 MPa. An amount of water to be used is reduced, and corrosion of a reactor is alleviated, and the nonpolar solvent is easily recovered and recycled. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
