METHOD FOR OPERATING AN INSTALLATION FOR THE CONTINUOUS PRODUCTION OF AN ISOCYANATE

The present invention relates to a method for operating a plant for continuous production of an isocyanate by converting a primary amine A with phosgene P whilst maintaining, based on the amino groups of the primary amine, a stoichiometric excess of phosgene in the presence of a solvent L in the liq...

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Bibliographic Details
Main Authors WILDERMUTH, Achim, HIELSCHER, Anke, WASTIAN, Dietmar, SPRIEWALD, Jürgen
Format Patent
LanguageEnglish
French
German
Published 12.06.2024
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The present invention relates to a method for operating a plant for continuous production of an isocyanate by converting a primary amine A with phosgene P whilst maintaining, based on the amino groups of the primary amine, a stoichiometric excess of phosgene in the presence of a solvent L in the liquid phase, using a first, adiabatically operated reaction chamber and a second, isothermally operated reaction chamber. The method is characterised in that a combination of measures, in particular the maintenance of a sufficiently high starting pressure and a sufficiently high starting temperature, is applied in order to bring the plant back into the target state, standard operation, starting from a state of interruption to production.
Bibliography:Application Number: EP20210726086