Conclusions
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1.
It was shown to be possible to obtain high yields of 2,4-toluylene diisocyanate by the carbonylation of 2, 4-dinitrotoluene in the presence of the heterogeneous catalyst PdO-Fe2O3-MoO3 (1.4∶1∶2) on aluminum oxide with a selectivity not less than that obtained with homogeneous-heterogeneous catalysts.
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2.
The possibility of directing the reaction towards the formation of monoisocyanates or diisocyanates by variation of the synthesis conditions was demonstrated.
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J. H. Saunders and K. K. Frish, Chemistry of Polyurethanes [in Russian], Khimiya (1968).
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D. Dodman, K. W. Pearson, and J. M. Woolley, German Patent No. 1901202 (1970); Chem. Abs.,71, 123894 (1970).
B. K. Nefedov and V. I. Manov-Yuvenskii, Izv. Akad. Nauk SSSR, Ser. Khim., 1905 (1976).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1555–1559, July, 1977.
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Nefedov, B.K., Manov-Yuvenskii, V.I. & Khoshdurdyev, K.O. Catalytic synthesis of 2,4-toluylene diisocyanate by the carbonylation of 2,4-dinitrotoluene with carbon monoxide. Russ Chem Bull 26, 1427–1430 (1977). https://doi.org/10.1007/BF00928521
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DOI: https://doi.org/10.1007/BF00928521