Process for producing urethane from nitro compounds, hydroxyl compounds and carbon monoxide using rhodium oxide catalysts
AssigneeEthyl Corporation
InventorGeorge C. Licke
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Abstract
In the process for preparing a urethane, particularly an aromatic urethane, by the reaction of an organic nitro compound, particularly an aromatic nitro compound, carbon monoxide, and an organic hydroxy compound in the presence of a catalyst, the improvement which comprises employing as said catalyst rhodium oxide, particularly substantially amorphous rhodium oxide, and optionally conducting the reaction in a nitrilic solvent.
Claims20
In a process for preparing a urethane by reacting an organic nitro compound with carbon monoxide and an alcohol or phenol at an elevated temperature and an elevated pressure in the presence of a catalyst, the improvement which comprises carrying out the reaction in the presence of a promoter amount of an alkyl nitrile and employing as a catalyst substantially amorphous rhodium oxide.
In a process for preparing an aromatic urethane which comprises reacting an aromatic nitro compound with carbon monoxide and an alcohol at an elevated temperature and an elevated pressure, the improvement which comprises carrying out the reaction in the presence of a promoter amount of an alkyl nitrile and of a catalytic amount of substantially amorphous rhodium oxide catalyst.
In a process for preparing an aromatic diurethane which comprises reacting dinitrotoluene with carbon monoxide and methanol at temperatures of from about 125.degree. C. to about 225.degree. C. and at elevated pressures, the improvement which comprises carrying out the reaction in the presence of a promoter amount of acetonitrile and of a catalytic amount of substantially amorphous rhodium oxide catalyst.
Dependencies are inferred from the claim text.