A PROCESS FOR THE PREPARATION OF AROMATIC POLYISOCYANATE COMPOUNDS IN THE GASEOUS PHASE

A PROCESS FOR THE PREPARATION OF AROMATIC POLYISOCYANATE COMPOUNDS IN THE GASEOUS PHASE

AROMATIC POLYISOCYANATES ARE PREPARED BY REACTING AT LEAST ONE COMPOUND (A), CONTAINING AT LEAST TWO PRIMARY AMINE FUNCTIONS AND AT LEAST ONE AROMATIC NUCLEUS, WITH A RELATIVELY MODEST QUANTITY OF PHOSGENE, IN THE GASEOUS PHASE, THE AMOUNT OF PHOSGENE RANGING FROM THE STOICHIMETRIC AMOUNT TO A STOIC...

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Bibliographische Detailangaben
Hauptverfasser: HENRI CHIARELLI, JEROME ARMAND, PASCAL VACUS, DENIS REVELANT
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:AROMATIC POLYISOCYANATES ARE PREPARED BY REACTING AT LEAST ONE COMPOUND (A), CONTAINING AT LEAST TWO PRIMARY AMINE FUNCTIONS AND AT LEAST ONE AROMATIC NUCLEUS, WITH A RELATIVELY MODEST QUANTITY OF PHOSGENE, IN THE GASEOUS PHASE, THE AMOUNT OF PHOSGENE RANGING FROM THE STOICHIMETRIC AMOUNT TO A STOICHIOMETRIC EXCESS OF 100WITH RESPECT TO THE NUMBER OF MOLES OF AMINE FUNCTIONS OF COMPOUND (A), CARRIED OUT IN A MIXED REACTOR WHICH COMPRISES A FIRST, HOMOGENIZING ZONE CONSTITUTING FROM 20TO 80OF THE TOTAL VOLUME THEREOF, AND A SECOND, ESSENTIALLY PISTON FLOW DOWNSTREAM ZONE CONSTITUTING FROM 80TO 20OF THE TOTAL VOLUME THEREOF.