Patent ID: 6632331
Filing Date: 2003-10-14
Classification: C08G

Abstract:
A method of purifying a polycyclic diol, which comprises distilling a mixture of the polycyclic diol and at least one aldehyde compound as impurity in the presence of an alkali metal compound and/or an alkaline earth metal compound in a proportion of 200 to 5000 ppm based on the polycyclic diol, at 180Â°-230Â° C. under a reduced pressure of 0.1 to 15 mmHg, thereby removing the aldehyde compound from the polycyclic diol, wherein the polycyclic diol is at least one diol selected from the group consisting of tricyclodecane dimethanol, bicycloheptane dimethanol, decalin dimethanol, pentacyclopentadecane dimethanol, and norbornene dimethanol.