Patent ID: 6984758
Filing Date: 2006-01-10
Classification: C07C

Abstract:
1. A method of purifying 1,3-bis(aminomethyl)cyclohexane which comprises a step of distilling a crude liquid containing 1,3-bis(aminomethyl)cyclohexane and a high-boiling component having a boiling point higher than that of 1,3-bis(aminomethyl)cyclohexane under conditions satisfying the following requirements A and B: (A) controlling a concentration of each of ruthenium, rhodium, palladium, platinum, cobalt and nickel which are contained in a bottom liquid placed in a distillation apparatus to less than 2 ppm by weight; and (B) distilling the bottom liquid under conditions satisfying the following formula 1: wherein c is a concentration (% by weight) of 1,3-bis(aminomethyl)cyclohexane in the bottom liquid, V is a hold up amount (kg) of the bottom liquid, D is a distillation speed (kg/h) and T is a temperature (° C.) of the bottom liquid, thereby obtaining a purified 1,3-bis(aminomethyl)cyclohexane which is free from the high-boiling component.