| 摘要 |
PROBLEM TO BE SOLVED: To produce carbonyl fluoride at a low cost without using a phosgene and carbon monoxide that are highly toxicix by allowing carbon dioxide to react with fluorine in a gaseous state. SOLUTION: The carbon dioxide and the fluorine are allowed to react with each other in the gaseous state at a temp. in the range of 150-400 deg.C, preferably 150-250 deg.C. In the reaction, either batch type or flow type may be used. A molar ratio of the carbon dioxide to the fluorine is in the range of 0.1-10, preferably 0.5-2. A reaction pressure may be selected properly depending on a reaction temp. and mixing ratio but the pressure near the atmosphere which is easy in handling may be selected preferably. A fluorine resistant metal, etc., such as nickel, nickel alloy, stainless steel, copper and aluminum and a fluorine resistant ceramic, etc., such as quartz, alumina, silicon carbide and aluminum nitride are used as a material of the reaction vessel. The vessel from which a water content is completely removed is preferably used as the reaction device and a preservation vessel of a produced carbonyl fluoride. |
