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L. A. Monyakina, N. V. Maksimova, V. S. Leshin, O. N. Shornikova, N. E. Sorokina, V. V. Avdeev, S. G. Ionov

Synthesis of graphite nitrate and its interaction with sulfuric acid

Abstract

Spontaneous intercalation of 80.8–97.0% HNO3 into highly oriented pyrolytic graphite is investigated by Calvet type calorimeter at 305 and 311 K and X-ray diffraction. The formation of the IV–II stages of graphite nitrate is established. The purpose of the present study is to investigate the intercalation of 94.6% H2SO4 into graphite nitrate II-IV stages by the same methods. It is shown that the shape of heat flow curves in the graphite nitrate –H2SO4 system depend on the stage number of graphite nitrate and reaction temperature. The interaction in graphite – 98% HNO3 – 96.0% H2SO4 system is carried out with different volume ratio HNO3 : H2SO4. The experimental data demonstrated that the content of sulfuric acid in the mixing solution influence on intercalation in the system. It is established that formation of the Ist stage of ternary compounds with variable composition takes place.
Moscow University Chemistry Bulletin.
2005, Vol. 46, No. 1, P. 66
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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