阅读说明：本技术 提供纯化的光气蒸气的节能方法 (Energy-saving method for providing purified phosgene vapor ) 是由 M.默克尔 M.埃里希 M.科拜尔卡 J.莫尔巴赫 M.卡拉斯科萨马斯 C.M.延斯 于 2018-06-22 设计创作，主要内容包括：本发明涉及制造纯化光气蒸气的方法,包括以下步骤：1)提供可获自氯与一氧化碳的反应的包含光气和一氧化碳的气体料流；2)单阶段或多阶段冷凝该气体料流,并除去不可冷凝的残余气体；3)单阶段或多阶段蒸发步骤2)中获得的液体光气,并任选使产生的光气蒸气过热；其中在步骤2)的一个或多个冷凝阶段与步骤3)中的一个或多个蒸发阶段之间实施能量集成,并且在最后的冷凝阶段中的压力比第一蒸发阶段中高≥0.2至≤6.0巴。(The invention relates to a method for producing purified phosgene vapors, comprising the following steps: 1) providing a gas stream comprising phosgene and carbon monoxide obtainable from the reaction of chlorine with carbon monoxide; 2) condensing the gas stream in a single or multiple stages and removing non-condensable residual gases; 3) evaporating the liquid phosgene obtained in step 2) in a single or multiple stages and optionally superheating the phosgene vapor produced; wherein an energy integration is carried out between the condensation stage or stages of step 2) and the evaporation stage or stages of step 3), and the pressure in the last condensation stage is higher by ≥ 0.2 to ≤ 6.0 bar than in the first evaporation stage.)