Phosgene - prepd from chlorine and excess carbon monoxide, - partially condensing product and recycling part of gaseous residue

摘要

Process comprises bringing Cl2 into contact with an excess of CO in the presence of active charcoal as the catalyst, followed by paratial condensation of the phosgene formed and recycling, to the synthesis, of a part of the uncondensed gas mixture, resulting from the reaction.