Process for producing diurethane from dinitro compounds, hydroxy

Details Process for producing diurethane from dinitro compounds, hydroxy Process for producing diurethane from dinitro compounds, hydroxy

1975-09-22

1977-10-04

Myers, Jane S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260468E, 260470, 260471C, 260479C, 260481C, 260482B, 260482C, 560 25, 560 22, 560 9, 560 13, 560115, 560158, 560114, 560133, 560134, C07C12506

Patent

active

040524205

ABSTRACT:
In the process for preparing a diurethane, particularly an aromatic diurethane, by the reaction of an organic dinitro compound, particularly an aromatic dinitro compound, carbon monoxide, and an organic hydroxyl compound in the presence of a catalyst, the improvement which comprises employing as said catalyst rhodium oxide, particularly substantially amorphous rhodium oxide, and carrying out the reaction in two stages, the first stage being carried out at a first temperature and pressure and the second stage being carried out at a higher temperature and pressure, and optionally conducting the reaction in a nitrilic solvent.

REFERENCES:
patent: 3467694 (1969-09-01), Hardy et al.
patent: 3576836 (1971-04-01), Prichard
patent: 3728370 (1973-04-01), Ottmann et al.
patent: 3754014 (1973-08-01), Kober et al.

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