Process for purifying cyanogen chloride gas

A process for purifying raw cyanogen chloride gas contaminated with chlorine which comprises fractionally separating chlorine from cyanogen chloride and thereafter absorbing essentially chlorine-free cyanogen chloride in a solvent which is fed to the bottom of the fractionation column and which has a higher boiling point than cyanogen chloride;

• the cyanogen chloride absorption and dissolution in the solvent being accomplished simultaneously in the lower portion of a stripping section, with the reboiling solvent providing vapors necessary for stripping the chlorine from the cyanogen chloride in the upper portion of the stripping section.