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