Phosgene synthesis by conversion of a gas mixture containing chlorine and carbon monoxide on an organic catalyst containing chloride anions

A composition having at least two phases, comprising as the first phase a gas mixture containing carbon monoxide, chlorine, and phosgene, and a catalyst-containing phase different therefrom, which comprises at least one ionic, monochloride anion-containing organic compound which forms an ionic, polychloride anion-containing organic compound on contact with the chlorine.

A method for producing phosgene, comprising:

• a) bringing a gas mixture containing carbon monoxide and chlorine into contact with a catalyst, wherein the catalyst comprises at least one ionic, monochloride anion-containing organic compound, which forms an ionic, polychloride anion-containing organic compound on contact with the chlorine,
• b) converting the gas mixture to phosgene over the catalyst, and
• c) collecting the phosgene formed in step b).