PROCESO PARA LA PREPARACION DE DIISOCIANATO DE ISOFORONA A PARTIR DE ESTERES DICARBAMILICOS DE ISOFORONA USANDO CATALIZADORES DE SNO2 O CUO ALTAMENTE SELECTIVOS

PROCESO PARA LA PREPARACION DE DIISOCIANATO DE ISOFORONA A PARTIR DE ESTERES DICARBAMILICOS DE ISOFORONA USANDO CATALIZADORES DE SNO2 O CUO ALTAMENTE SELECTIVOS

Isophorone diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (IPDI) is prepared by liquid phase thermolysis of the corresponding bis-carbamic acid ester into the corresponding isocyanate and alcohol, respectively, in the presence of a highly selective metal oxide catalyst (SnO2 an...

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Bibliographische Detailangaben
Hauptverfasser: LUH, YUHSHI, FORGIONE, PETER SALVATORE
Format: Patent
Sprache:spa
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Zusammenfassung:Isophorone diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (IPDI) is prepared by liquid phase thermolysis of the corresponding bis-carbamic acid ester into the corresponding isocyanate and alcohol, respectively, in the presence of a highly selective metal oxide catalyst (SnO2 and/or CuO). Typically, the cracking reaction is carried out at a temperature from 225 DEG to 350 DEG C, at a pressure of from 20 to 50 mmHg. These catalysts give high IPDI yields with high conversions of the carbamic acid esters.