Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 7, pp. 1213−1216.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © D.B. Tagiev, S.B. Agaeva, S.I. Abasov, R.V. Starikov, F.M. Nasirova, 2011, published in Zhurnal Prikladnoi Khimii, 2011, Vol. 84,
No. 7, pp. 1141−1144.
AND INDUSTRIAL ORGANIC CHEMISTRY
Aromatization of Butane over Zirconium-containing
and Zinc-zirconia-zeolite Catalysts
D. B. Tagiev, S. B. Agaeva, S. I. Abasov, R. V. Starikov, and F. M. Nasirova
Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, Azerbaijan, Baku
Received July 28, 2010
Abstract—Comparative researches were conducted of zinc-, zirconia, and zinc- zirconia-ziolite catalysts for
The process of catalytic processing of individual paraf-
ﬁ n hydrocarbons, particularly n-butane, to highly market-
able products, aromatic hydrocarbons, is in the center of
attention of researchers [1–5]. In  it was demonstrated
the advantage of Sn-Zn-zeolite catalyst developed by A.L.
Lepidus et al. for aromatization of propane–butane faction
(PBF) for a ﬂ ow installation in comparison with those
of foreign ﬁ rms. At present, special attention is given to
researches with use of zirconium-containing samples, in
particular with high activity for isomerization of n-alkanes
[6–8]. However, the published papers on the use of nano-
sized powders of zirconium in the aromatization of n-
butane do not show aromatizing activity without modifying
agents [9, 10]. Accounting for that the process of aromatiza-
tion of n-parafﬁ ns proceeds at elevated temperatures and,
apparently, through a stage of intermediate formation of the
isomeric intermediate , the introduction of zirconium in
the NZSM-5 zeolites allows more effective aromatization
of lower alkanes. Therefore, it is promising to increase the
efﬁ ciency of conventional zeolite catalysts by zirconium
modifying to determine the possibility of carrying out the
process in a more favorable energy conditions.
In the study we examined the activity of zirconium
catalysts for aromatization of n-butane, component of
casing-head and fume reﬁ nery manufacture gases, into a
mixture of aromatic hydrocarbons: benzene–toluene–xy-
lene fraction (BTX).
To prepare the catalysts zeolite HZSM-5 hydrogel and
zirconium dioxide obtained by hydrolysis of ZrOCl
in the presence of NH
OH at elevated temperatures were
used as the initial supports (Table 1). Zirconium salt
O and zinc salt Zn (CH
were used as a source of active ingredients.
Application of zirconium and zinc salts on the zeolite
HZSM-5 of an H-form was performed by soaking for
24 hours with further evaporation, drying at room tem-
perature, mixing with the binder, Al
, and subsequent
heat treatment at 120, 350 and 500°C for 4 h.
Testing the catalytic activity of the synthesized
Table 1. Composition of synthesized catalysts
Zirconium hydrogel Zn 5Zn/ZrO
All samples contain 25% Al