Catalytic reduction of nitro aromatic compounds with hydrogen su

Details Catalytic reduction of nitro aromatic compounds with hydrogen su Catalytic reduction of nitro aromatic compounds with hydrogen su

1980-06-11

1983-06-07

Shaver, Paul F.

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

Organic compounds

Amino nitrogen containing

564413, 564421, 564422, 564163, 564166, 564167, 564170, 564171, 564172, 564180, 546 1, 546152, 252411S, C07C 8511

Patent

active

043872476

ABSTRACT:
In the reduction of di- or polynitro aromatic compounds by gaseous H.sub.2 S over a solid catalyst, addition of CO gas promotes formation of amino groups from all nitro groups in the molecule. A preferred embodiment is reduction of 2,4- and/or 2,6-dinitrotoluene in vapor phase at 325.degree. C. over a supported iron or supported cobalt catalyst on a support comprising alumina. The amino products are useful for production of polyurethane resins.

REFERENCES:
patent: 1237828 (1917-08-01), Schmidt et al.
patent: 2402439 (1946-06-01), Owen
patent: 2455713 (1948-12-01), Voorhies
patent: 2620356 (1952-12-01), Munday
patent: 3637820 (1972-01-01), Dodman et al.
patent: 3739026 (1973-06-01), Wilson
patent: 3801640 (1974-04-01), Knifton
patent: 3935264 (1976-01-01), Bhutani
patent: 4079072 (1978-03-01), Finch

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