METHOD OF PURIFYING OUTGOING GASES IN BENZOYL CHLORIDE PRODUCTION

A process for purification of the off-gases resulting from the production of benzoyl chloride by phosgenation of benzoic acid from phosgene comprising recovery of phosgene from said off-gases by means of a selective absorbent, i.e. benzoyl chloride at a temperature within the range of from 1 DEG to...

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Hauptverfasser:	KONDRATENKO VLADIMIR I,SU, KOLESNIKOV VALERIJ YA,SU, NEFEDOV VALENTIN I,SU, FUDALER YURIJ A,SU, NOVIKOV IVAN N,SU, FELDMAN ISAJ N,SU, MOISEEV BORIS G,SU
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for purification of the off-gases resulting from the production of benzoyl chloride by phosgenation of benzoic acid from phosgene comprising recovery of phosgene from said off-gases by means of a selective absorbent, i.e. benzoyl chloride at a temperature within the range of from 1 DEG to 40 DEG C. The recovered phosgene is recycled to the production of benzoyl chloride. The process is technologically simple, it makes possible to purify the off-gases without decomposition of phosgene thus preventing pollution of the environments; it also makes possible to simplify utilization of hydrogen chloride contained in the off-gases and, thereby, simplify preparation of commercial hydrochloric acid.