Effect of Industrial Detonation Nanodiamonds on the Ratio of Mononitrotoluene Isomers in Nitration of Toluene with a Sulfuric-Nitric Acid Mixture |
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Authors: | E A Veretennikov I V Tselinskii M V Veretennikova |
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Institution: | 1.JSC “Chemical-Pharmaceutical Technologies”,St. Petersburg,Russia;2.St. Petersburg State Technological Institute (Technological University),St. Petersburg,Russia |
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Abstract: | A qualitative and quantitative influence exerted by addition of detonation nanodiamonds on the formation selectivity of mononitrotoluene isomers in the heterophase nitration of toluene with a sulfuric-nitric acid mixture having low nitration activity was found. It is shown that the isomer ratio of the ortho-/paramononitrotoluenes can be varied within the range 1.00–2.7 at a temperature of 50°C by changing the stirring intensity within the range 300–5000 rpm. It was found that the strongest influence on the ortho-/para-ratio of the mononitrotoluene isomers is exerted by nanodiamonds having surface chemically modified via oxidation with a mixture of concentrated nitric and sulfuric acids. |
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