METHOD FOR CONTROLLING THE PROCESS FOR MAKING ISOCYANATES

The invention relates to a method for preparing an aromatic polyisocyanate in an isocyanate plant comprising a reaction section for a phosgenation reaction, wherein a primary aromatic amine is reacted with phosgene compounds in a reaction section to obtain an isocyanate comprising reaction product a...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: MULLER, Peter, CARR, Robert, Henry
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The invention relates to a method for preparing an aromatic polyisocyanate in an isocyanate plant comprising a reaction section for a phosgenation reaction, wherein a primary aromatic amine is reacted with phosgene compounds in a reaction section to obtain an isocyanate comprising reaction product and wherein CO2 concentration in the gases coming from the reaction section is measured and analyzed, and wherein the conditions in the phosgenation reaction are adjusted in case the CO2 concentration in the gases coming from the reaction section is higher than a background CO2 concentration.