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Effect of medium acidity on the efficiency of oxidation of 2,4,6-trinitrotoluene to 2,4,6-trinitrobenzoic acid

An effect of boric acid additives on oxidation of 2,4,6-trinitrotoluene (TNT) to 2,4,6-trinitrobenzoic acid (TNBA) with chromic anhydride in concentrated (96—100%) H 2 SO 4 has been studied. In the presence of tetrahydrosulfatoboric acid HB(HSO 4 ) 4 formed in situ (up to 5 mol.%) or added as a prel...

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Bibliographic Details
Published in:Russian chemical bulletin 2016-09, Vol.65 (9), p.2216-2219
Main Authors: Мikhal´chenko, L. V., Leibzon, V. N., Leonova, M. Yu, Gultyai, V. P.
Format: Article
Language:English
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Summary:An effect of boric acid additives on oxidation of 2,4,6-trinitrotoluene (TNT) to 2,4,6-trinitrobenzoic acid (TNBA) with chromic anhydride in concentrated (96—100%) H 2 SO 4 has been studied. In the presence of tetrahydrosulfatoboric acid HB(HSO 4 ) 4 formed in situ (up to 5 mol.%) or added as a preliminary prepared solution (up to 1 mol. %), TNT is selectively oxidized to TNBA in the yields up to 95—99%. The mechanism including formation of TNT dication as a key step of its oxidation at the methyl group has been suggested.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-016-1571-0