Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 12, pp. 2155−2158.
Pleiades Publishing, Ltd., 2011.
Original Russian Text
O.R. Abdurakhmanov, Z.S. Salimov, Sh.M. Saydakhmedov, Kh.N. Bobokhonov, B.S. Usmonov, 2010, published in Khimicheskaya
Promyshlennost’, 2010, Vol. 87, No. 7, pp. 339−342.
TECHNOLOGY OF ORGANIC
AND INORGANIC CHEMISTRY
Intensiﬁ cation of the Process of Primary Distillation
of Crude Oil-Gas Condensate
O. R. Abdurakhmanov
, Z. S. Salimov
, Sh. M. Saydakhmedov
Kh. N. Bobokhonov
, and B. S. Usmonov
Tashkent State Technical University, Tashkent, Republic Uzbekistan
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic Uzbekistan, Republic Uzbekistan
Bukhara Oil Reﬁ nery, Bukhara, Republic Uzbekistan
Received September 14, 2010
Abstract—Results of fractionation on laboratory apparatus ARN-2 are reported and generalized, and distillation
curves are obtained for certain hydrocarbons. The process of primary distillation of crude oil-gas condensate with
the high content of low-boiling hydrocarbons is analyzed.
Oil, gas condensates, and their fractions are a complex
mixture of organic compounds. Hundreds of hydro-
carbons with different structure, multiple heterorganic
compounds are found in their composition. Therefore
the investigation on the chemical composition of the
oil, its products as a combination of all compounds in-
cluded in their composition, and of their physicochemical
characteristics is most complicated and necessary task.
Nowadays the individual hydrocarbon composition can
be sufﬁ ciently reliably determined by gas-liquid chroma-
tography only for individual gasoline fractions Therefore,
the individual hydrocarbon composition cannot be the
basis for the predictive methods of calculation of ther-
mophysical characteristics due to its inaccessibility for
customers. At the same time the fractional composition
and structural-group hydrocarbon composition can have
more productive application in generation of calculation
methods of thermophysical characteristics.
As a rule, oil and oil products are separated by distil-
lation in fractions, each of these being a less complex
mixture. Hydrocarbon fractions in comparison with
individual compounds do not have constant boiling tem-
perature. They boil in a certain interval of temperature.
Temperatures of the beginning of boiling and the end
of boiling depend on the chemical composition of the
Thus, the fractional composition of oil and oil products
shows the content in it of different fractions, evaporating
within certain temperature limits. This index has a big
practical importance. By the fractional composition of
oil it is possible to determine which products and in what
quantities can be separated; and the fractional composi-
tion of gasoline and other engine fuels characterizes their
volatility, fullness of volatilization etc.
The determination of the fractional composition of
the oil and gas condensate in laboratory conditions was
performed on distillation apparatuses ARN-2.
The rectification in apparatus ARN-2 cannot be
performed over 450–460°C due to the possible thermal
decomposition of the residue. It is recommended by
the Uniﬁ ed research program of oil to distil further the
residue obtained prior the start of decomposition in ap-
paratus ARN-2 by the method of Grozny Research Insti-
tute in Manovyan ﬂ ask [1–3] up to boiling temperature
560–580°C. Therewiththe behavior of the curve of true
boiling point (TBP) almost does not change.
Oil and raw gas condensate of different ﬁ elds were in-
vestigated in laboratory conditions on apparatus ARN-2.
Therewith the physicochemical characteristics of hydro-
carbon fractions were determined. The distillation for the
determination of the content of light products was carried
out for raw gas condensate of deposits of Kokdumalak,