ISSN 1070-4272, Russian Journal of Applied Chemistry, 2006, Vol. 79, No. 12, pp. 1943!1946. + Pleiades Publishing, Inc., 2006.
Original Russian Text + R.R. Daminev, E.I. Bakhonina, Yu.K. Dmitriev, R.N. Zagidullin, M.M. Muratov, L.F. Tukhvatullina, 2006, published in
Zhurnal Prikladnoi Khimii, 2006, Vol. 79, No. 12, pp. 1966!1969.
AND ION-EXCHANGE PROCESSES
Reactivation of a Solid Carbon-Containing Adsorbent,
Graton, in a Microwave Electromagnetic Field
R. R. Daminev, E. I. Bakhonina, Yu. K. Dmitriev, R. N. Zagidullin,
M. M. Muratov, and L. F. Tukhvatullina
Sterlitamak Branch, Ufa State Technical University of Oil, Sterlitamak, Bashkortostan, Russia
Kaustik ZAO, Sterlitamak, Bashkortostan, Russia
Received July 5, 2005; in final form, July 2006
Abstract-Results of experimental studies of reactivation of a graphite packing, Graton, in a microwave
electromagnetic field are presented.
Adsorbents are widely employed in purification of
gases and liquids to remove impurities . Their use
requires periodic regeneration, removal of adsorbed
substances from adsorbent pores . For example,
electrochemical decomposition of a sodium amalgam
on a carbon-containing packing with a developed sur-
face area (Graton or graphilite) is used at organochlo-
. The packing serves as an anode, and so-
dium amalgam, as a cathode. The sodium amalgam
is produced in the reaction of sodium with mercury:
sodium is recovered from brine in discharge of Na
ions at the mercury cathode of a chlorine electrolyzer:
+e+nHg 6 NaHg
Decomposition of the sodium amalgam with water
is the second stage in manufacture of sodium hydrox-
ide. In the process, NaOH and H
are formed, and
mercury is regenerated and returned into the electro-
O 6 NaOH + 1/2H
In electrochemical decomposition of the amalgam,
reduction and oxidation processes occur separately
and involve the current-conducting surface, which
accepts electrons from the reducing agent, NaHg
transfers them to the oxidizing agent, H
Kaustik ZAO, Sterlitamak.
The process of amalgam decomposition can be made
tens of times faster if it is directed by the electrochem-
ical pathway. For this purpose, it is necessary to di-
minish the hydrogen overvoltage. The most pronounced
effect is achieved when hydrogen evolution occurs on
a material with a lower overvoltage, brought in electric
contact with mercury, rather than on mercury itself.
The amalgam is decomposed in vertical cylindrical
apparatus (VCA) filled with a graphite packing (Fig. 1).
Fig. 1. Schematic of a VCA for decomposition of a sodium