Process for the preparation of toluene diamines

Details Process for the preparation of toluene diamines Process for the preparation of toluene diamines

1985-12-20

1988-01-05

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C 5116

Patent

active

047177748

ABSTRACT:
The invention relates to an improved process for the preparation of toluene diamine from dinitrotoluene involving hydrogenation of dinitrotoluene with hydrogen gas at elevated temperatures and super atmospheric pressure in the presence of a supported nickel catalyst and carbon monoxide ranging from 0.001 to 0.1 volume percent. The rate of hydrogenation, product quality and yield are improved when hydrogen spiked with small amounts of carbon monoxide was used.

REFERENCES:
patent: 1124776 (1915-01-01), Marwedel
patent: 3517063 (1970-06-01), Nason
patent: 3637820 (1972-01-01), Dodman et al.
patent: 3801640 (1974-04-01), Knifton
patent: 3935264 (1976-01-01), Bhutani

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