Process for producing isocyanate from nitro compounds and carbon monoxide using rhodium oxide catalysts
AssigneeEthyl Corporation
InventorGeorge C. Licke
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Abstract
In the process for preparing isocyanate, particularly aromatic isocyanate, by the reaction of an organic nitro compound, particularly an aromatic dinitro compound with carbon monoxide in the presence of a catalyst, the improvement which comprises employing as said catalyst rhodium oxide, particularly substantially amorphous rhodium oxide, and conducting the reaction in the presence of a promoter quantity of a nitrilic solvent, such as acetonitrile.
Claims15
A process for the preparation of an isocyanate mixture comprising mono- and diisocyanates derivable from an aromatic dinitro compound, said process comprising reacting said dinitro compound with carbon monoxide at an elevated temperature and an elevated pressure in the presence of a rhodium oxide catalyst and a promoter quantity of an alkyl nitrile solvent.
A process for the preparation of an isocyanate mixture comprising mono- and diisocyanates derivable from an aromatic dinitro compound, said process comprising reacting said dinitro compound with carbon monoxide at an elevated temperature and an elevated pressure in the presence of an amorphous rhodium oxide catalyst and a promoter quantity of an alkyl nitrile solvent.
Dependencies are inferred from the claim text.