| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing phosgene where the increase of pressure drop and the deterioration of a solid catalyst caused by clogging of the chloride of nickel (a solid compound) produced by reacting a nickel compound in carbon monoxide produced by using coke with chlorine when producing phosgene on the surface layer and in the space of the solid catalyst are suppressed, where the renewal frequency of the solid catalyst is reduced, which has an advantageous cost and which has excellent production efficiency, and to provide a method for producing the carbon monoxide used as the raw material of phosgene.SOLUTION: In a method for producing high purity carbon monoxide by purifying the carbon monoxide produced by oxidizing the coke by the aeration of an oxygen-containing gas to the coke, it is characterized in that the obtained carbon monoxide is in contact with an aqueous alkali solution after being in contact with chlorine and then the carbon monoxide is in contact with an adsorbing agent. |
