METHOD FOR CLEANING PHOSGENE CONDUCTING APPARATUS

The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phosgene residues with a continuous increase in temperature until a...

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Bibliographische Detailangaben
Hauptverfasser:	Plathen, Peter, Wolf, Peter, Manzel, Dirk, Boegel, Udo
Format:	Patent
Sprache:	eng
Schlagworte:	ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLEANING CLEANING IN GENERAL COMPOUNDS THEREOF DETERGENT COMPOSITIONS DETERGENTS FATTY ACIDS THEREFROM INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREVENTION OF FOULING IN GENERAL RECOVERY OF GLYCEROL RESIN SOAPS SEPARATION SOAP OR SOAP-MAKING THEIR RELEVANT APPARATUS TRANSPORTING USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phosgene residues with a continuous increase in temperature until a maximum temperature ranging between 30° C. to 120° C. is reached; once the maximum temperature is reached, shutting down the ammonia supply and the conveying of inert gas, optionally (and preferably) followed by washing the apparatus with an aqueous stream.