초록

Raw material yields are increased and waste disposal requirements are decreased in the preparation of phosgene by the reaction of chlorine with an excess of carbon monoxide in the presence of an activated carbon catalyst by recovering unreacted carbon monoxide and recycling it to the reaction zone.

대표청구항 ▼

An improved process for preparing phosgene by reacting chlorine with substantially pure carbon monoxide in a reaction zone to produce a product gas mixture comprising phosgene and unreacted carbon monoxide, separating substantially all of said phosgene from said unreacted carbon monoxide by passing

An improved process for preparing phosgene by reacting chlorine with substantially pure carbon monoxide in a reaction zone to produce a product gas mixture comprising phosgene and unreacted carbon monoxide, separating substantially all of said phosgene from said unreacted carbon monoxide by passing the gas mixture through a partial condensation zone and recycling a major portion of said unreacted carbon monoxide directly to said reaction zone whereby the raw material yield of the process is increased and the amount of carbon monoxide discarded as a waste stream is reduced.