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Chemistry and Technology of Fuels and Oils, Vol. 39, Nos. 1-2, 2003
EFFECT OF ACTIVATORS IN PRODUCTION OF OXIDIZED ASPHALTS
A. F. Kemalov UDC 665.775
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Kazan State Engineering University. Translated from Khimiya i Tekhnologiya Topliv i Masel, Nos. 1-2,
pp. 64 67, January April, 2003.
0009-3092/03/3901 0076$25.00Ó2003Plenum Publishing Corporation
It is shown that activators and mixtures of activators added to oxidation feedstock (vacuum resid)
alter its colloidal structure and rheological properties. As a result, extreme values of the size of
complex structural units are attained in the vacuum resid and the phase interface increases so that
production of oxidized asphalts is enhanced and their quality is improved. Based on the results of
industrial tests, the technology for enhancement of asphalt production is recommended for
introduction.
The urgency of the problem of conserving power in production of asphalts by the oxidation method is
increasing with the increase in the demand for asphalts. The oxidation process lasts for 10 h and more as a
function of the grade of product obtained, the softening point of the feedstock, and the air consumption. One
effective method of solving this problem is to enhance the process with specially selected activators added to
the feedstock [1]. Another advantage of this method is the possibility of improving the quality of the asphalt
obtained without significantly altering the implementation of the process and production technology.
Many products from oil refining and petrochemistry primarily highly aromatized mixtures of
hydrocarbons and resins, have been investigated as oxidation enhancing additives [2, 3]. We investigated the
difficult to use by-products from Nizhnekamskneftekhim Co. bottoms from production of alkylbenzenes
(BOT) and mixtures of them as feedstock activators.
The former contain 65-68 wt. % aromatic hydrocarbons, and the latter consist of 30-35 wt. %
dimethylformamide and 65-70 wt. % polymer resin. The =NH, COOH, and O=CHN functional groups present
in BOT (established by IR spectroscopy) should in our opinion improve the adhesiveness of the asphalt with the
surface of mineral material.
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