| 摘要 |
A method for distillation of 1,2-dichloroethane containing high-boiling substances in a high-boiling column is disclosed, which comprises distilling the 1,2-dichloroethane in said high-boiling column at an overhead pressure higher than one atmosphere (absolute), introducing the 1,2-dichloroethane gas recovered from the top of said column into a compressor, increasing the pressure and temperature of said gas to levels higher than the overhead pressure and temperature by from 0.5 kg/cm<2> or more and from 7 DEG C or more, respectively, and recovering heat from said gas. The method includes a heat recovery step for making effective use of the thermal energy of a 1,2-dichloroethane gas being recovered from the top of the high-boiling column in which 1,2-dichloroethane containing high-boiling substances is distilled. |
