ENERGY-EFFICIENT METHOD FOR PROVIDING A PURIFIED PHOSGENE VAPOUR
The present invention relates to a method for producing purified phosgene vapor, comprising the following steps: 1) providing a gas flow obtainable from the reaction of chlorine with carbon monoxide and comprising phosgene and carbon monoxide; 2) one-stage or multi-stage condensation of the gas flow...
Saved in:
Main Authors | , , , , , |
---|---|
Format | Patent |
Language | English French German |
Published |
06.05.2020
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The present invention relates to a method for producing purified phosgene vapor, comprising the following steps: 1) providing a gas flow obtainable from the reaction of chlorine with carbon monoxide and comprising phosgene and carbon monoxide; 2) one-stage or multi-stage condensation of the gas flow and separation of non-condensable residue gases; 3) one-stage or multi-stage evaporation of the liquid phosgene obtained in step 2) and optional overheating of the produced phosgene vapour, wherein there is an energy integration between one or more of the condensation steps of step 2) and one or more of the evaporation steps in step 3) and the pressure in the last condensation step is between ≥0.2 and ≤6.0 bar higher than in the first evaporation step. |
---|---|
Bibliography: | Application Number: EP20180732354 |