Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 5, pp. 648−653.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © T.A. Rozdyalovskaya, Yu.S. Chekryshkin, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 5, pp. 700−706.
AND INDUSTRIAL ORGANIC CHEMISTRY
Deep Hexachlorocyclohexane Oxidation
on Molten High-Basic Catalysts
T. A. Rozdyalovskaya and Yu. S. Chekryshkin
Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences, Perm, Russia
Received February 12, 2013
Abstract—Gas-liquid chromatography, chromato-mass-spectrometry, and capillary electrophoresis method were
used to study the reaction of deep oxidation of γ-C
(lindane, an insecticide of contact, enteric, and fumigant
action) on molten eutectic mixtures of alkali metal hydroxides and carbonates with and without addition of active
, CuO, and NaNO
, in relation to temperature, catalyst load, and O
relative to stoichiometry in a closed system. It is shown that the highest activity, among the catalytic systems
studied, in the reaction of deep oxidation of lindane is exhibited by molten catalysts based on a eutectic mixture
of alkali metal carbonates with addition of active components, V
Utilization of industrial and household waste is
a priority area within programs aimed to conserve
ecologically clean environment. Particular attention is
paid to processing of noxious waste. To these belong
unidentiﬁ ed, expired and prohibited-for-use pesticides
and herbicides, many of which (e.g., altrazine,
prometrin, aldrin, etc.) belong to ﬁ rst class of hazard.
Halohydrocarbons are particularly hazardous for living
systems because of their ability to penetrate through
skin and accumulate in an organism and to undergo
transformations yielding dioxins.
The fundamental aspects of the deep oxidation of
halohydrocarbons have been examined during a long
time. However, despite the large number of studies
aimed to develop catalysts for heterogeneous-catalytic
oxidation of halohydrocarbons (HHs), the problem of
development of an active and stable catalyst operating
in the presence of chlorine and hydrogen chloride in the
reaction system is far from being solved [1–4].
An ecologically effective way to process HHs is by
their catalytic oxidation (burning) on high-temperature
ionic melts [1, 2, 5–7]. The reaction is performed in the
temperature range 350–750°C, its main products being
water vapor and carbon dioxide. The authors of  have
developed and tested a gas-lift reactor for elimination of
altrazine and ramrod pesticides. It was shown that the
pesticides are fully oxidized on a NaOH–KOH catalyst
(eutectic) at a temperature of 475°C. The oxidative
destruction and pyrolysis of PVC in molten NaNO
systems at 260°C occurs to give, in addition to
the gas phase, water-soluble sodium and carbon residue
halides in 95% yield [8, 9].
The oxidative destruction of chlorobenzene,
trichloroethylene, tetrachloromethane, and an oil
containing bisphenol polychlorides on a molten eutectic
mixture of lithium and sodium carbonates was examined
in [1, 2]. These studies used two reactors in which
the intermediate products (benzene, CCl
ethylene, acetylene, CO, and HCl) formed in the ﬁ rst
reactor were decomposed in the second. The destruction
of polychlorobiphenyls occurs at temperatures above
900°C to a 99.9999% extent .
We studied the conversion of γ-C
molten highly basic catalysts. Lindane, an insecticide of
contact, enteric, and fumigant action, is a white solid
crystalline substance whose properties are preserved
under the action of light and high temperature and
in contact with the atmosphere, carbon dioxide, and