Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 6, pp. 1126−1129.
Pleiades Publishing, Ltd., 2010.
Original Russian Text
M.S. Alosmanov, A.M. Aliev, N.M. Binnetova, S.M. Ibragimova, R.Kh. Kuliev, 2010, published in Khimicheskaya Promyshlennost’,
2010, Vol. 87, No. 2, pp. 59−62.
TECHNOLOGY OF ORGANIC
AND INORGANIC CHEMISTRY
Investigation of Superphosphate Preparation
on the Basis of Apatite Concentrate
and Mardin-Mazidagi Phosphorite Mixture
M. S. Alosmanov
, A. M. Aliev, N. M. Binnetova, S. M. Ibragimova, and R. Kh. Kuliev
Institute of Chemical Problems, National Academy of Sciences of Azerbaijan, Azerbaijan
Received January 13, 2010
Abstract—A preparation of the superphosphate on the basis of a apatite concentrate and Mardin-Mazidagi
phosphorite mixture was investigated. It was stated that the superphosphate obtained as a result of a substitution
of the apatite concentrate by Mardin-Mazidagi phosphorite up to 45% met the requirements of State Standards.
In recent years the need of phosphorus-containing
fertilizers remains high [1, 3] so a problem of use and
management of the apatite concentrate is of increasing
Previously the scarce expensive apatite concentrate
was replaced by phosphorite of Karatau deposit .
However the substituted part of the apatite concentrate
by phosphorite did not exceed 25 –30% since a further
increase in phosphorite fraction of the phosphate mixture
led to lowering a decomposition degree of the phosphate
raw material and P
In this regard, we have studied the preparation of
superphosphate on the basis of a mixture of apatite con-
centrate and Mardin-Mazydagi phosphorite (Turkey).
In conducting the experiments the apatite concentrate
partially replaced by Mazydagi phosphorites of the
following composition (wt.%): P
2.0; Fe 2.0–2.8;
O 0.6–1.0 Na
O 0.7–1.03, Al
35.0–36.3; NA 8.
The compositions of the phosphate mixtures in
dependence on an apatite concentrate to Mazidagi
phosphorite ratio are listed in Table 1.
The experiments on the superphosphate preparation
were conducted according to the standard technique
. We used 62% sulfuric acid for determination of the
dependence of the decomposition degree of the mixture
of the apatite concentrate and Mazidagi phosphorite on
their ratio in the mixture.
As Table 2 shows that in the case of an increase in
amount of Mazidagi phosphorite in the mixture of the
phosphate raw material the decomposition degree in the
chamber product grows and reaches a maximum at 45%
content of phosphorite. It can be understood by the fact
that in the course of using Mazidagi phosphorite a small
amount of oxides of magnesium, sodium, potassium et
al. contained in it exerts a salting-out effect and facilitates
a formation of more large crystals of calcium sulfate.
As a result a diffusion of sulfuric acid to a surface of
phosphates being non-reacted is improved and also grow
the decomposion degree of the phosphate raw material
In addition, in the case of use of Mazidagi phos-
phorite with 7.7% content of iron oxide the obtained
superphosphate enriched by an additional nutrient, iron,
that in turn leads to improvement of superphosphate
quality and, respectively, to an increase in a quality and
fruits and vegetables yield, since as known , an intense
phosphoric nutrition of plants is possible with the aid of
other nutrients: magnesium, iron, potassium et al.
Results of experiments on studying an effect of the
apatite concentrate to Mazidagi phosphorite ratio on