Add time:09/27/2019 Source:infona.pl
Results of the catalytic hydrogenation of 2,4,6-TRINITROBENZOIC ACID (cas 129-66-8) (TNBA) in the presence of 1% Pd/C catalyst with analysis of the reaction products at the steps corresponding to the consumption of 1, 3, 5, 6, 8 and 9mols of hydrogen per mol of TNBA are presented. Numerous reaction intermediates were identified using the 1H and 13C NMR spectroscopy; the reaction mixture composition was assessed quantitatively at different steps of the hydrogenation. The data obtained were used to propose a scheme of TNBA transformations over the Pd/C catalyst in the aqueous-phase reaction conditions. The data on the component composition at different steps of TNBA hydrogenation are important to understand the process chemistry, to explore the possibility of selective formation of different types of intermediate nitroamino compounds, and to synthesize high-performance catalysts for the hydrogenation of aromatic polynitro compounds.
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