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Egorov A.G.,Kazan Federal University | Gilmanov Kh.Kh.,OAO Nizhnekamskneftekhim | Lamberov A.A.,Kazan Federal University | Urtyakov P.V.,Kazan Federal University
Catalysis in Industry | Year: 2014

A mathematical model is suggested for the dehydrogenation of isoamylenes into isoprene in a fixed bed of industrial, self-regenerating, iron-potassium catalysts (KDOM and ZhKD). The model takes into account the size and shape of catalyst granules, the rate constants and activation energies of the forward (dehydrogenation) and reverses (hydrogenation) reactions, those of cracking and catalyst self-regeneration reactions, and the buildup of leachable and nonleachable coke. The mathematical model adequately describes the physical and chemical processes occurring in the dehydrogenation of isoamylenes in industrial reactors at different amounts of iron-potassium catalyst and varied reactor operation parameters (feed flow rate, degree of dilution of the feedstock with water vapor, temperature and pressure at the reactor inlet. It provides means to optimize the technological parameters of the industrial process. © Pleiades Publishing, Ltd., 2014. © A.G. Egorov, Kh.Kh. Gilmanov, A.A. Lamberov, P.V. Urtyakov, 2014.


Kataev A.N.,Kazan Federal University | Lamberov A.A.,Kazan Federal University | Egorova S.R.,Kazan Federal University | Gilmanov Kh.Kh.,OAO Nizhnekamskneftekhim
Catalysis in Industry | Year: 2014

The main problems associated with the operation of microspherical treating-type chromia-alumina catalysts with increased strength during isoparaffin dehydrogenation are discussed. The erosive wear of the walls of overflow pipelines when using a mixture of treating-type KDI and conventional IM-2201S catalysts and ways of solving the problem are emphasized. It is found that the main reason for an increase in erosive wear is the greater momentum of catalyst particles due to a higher mean particle size and gas transport rate; upon transitioning from IM-2201S to a mixture of IM-2201S and KDM (70 : 30), the mean particle size of the equilibrium catalyst grows from 68 to 74 μm. The optimum size range of a high-strength catalytic system in which the activity does not increase over time is calculated with a lower rate of transport gas injection while keeping the number of particles 20-40 μm in size at 20-30 wt %. Pilot batch production of high-strength catalyst in the optimum size range is recommended in order to shift units for the industrial dehydrogenation of isobutane to the use of treating-type KDI catalyst without the addition of IM-2201S. © Pleiades Publishing, Ltd., 2014. © A.N. Kataev, A.A. Lamberov, S.R. Egorova, Kh.Kh. Gilmanov, 2014.


Gil'manov Kh.Kh.,OAO Nizhnekamskneftekhim | Lamberov A.A.,Kazan Federal University
Catalysis in Industry | Year: 2011

This paper discusses prospects for the innovative development in the OAO Nizhnekamskneftekhim corporation. Only the innovative technologies are identified from the entire variety of research and development activities of last years, and their development and industrial implementation is analyzed in a number of examples. The key participants of the innovative technologies market are briefly noted, and Russian academic institutions (Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences) in the research and development and in the development and implementation of their own new catalysts take more active involvement. Some successful aspects of the integration of the university research and science-technical services of the corporation are exemplified by the cooperation of Kazan (Volga) Federal University and the Nizhnekamskneftekhim corporation. The problems of innovative development in other universities and the effectiveness of Russian state policy in the development of the innovative economy are briefly reviewed. © 2011 Pleiades Publishing, Ltd.


Makhiyanov N.,OAO Nizhnekamskneftekhim
Polymer Science - Series A | Year: 2010

The 1H NMR spectra (working frequencies of 500 and 600 MHz) of polychloroprenes are studied. The spin systems of protons for monomer units of different configurations (1,2, 3,4, 1,4-cis-and 1,4-transunits), as well as for dyad and triad combinations of 1,4 units, are classified. A high working frequency, the method of double resonance, and the calculation of chemical shifts by empirical increments make it possible to refine the assignment of 1H NMR signals. © Pleiades Publishing, Ltd., 2010.


Makhiyanov N.,OAO Nizhnekamskneftekhim
Polymer Science - Series A | Year: 2012

The NMR spectra (600 MHz) of polybutadienes containing different amounts of cis-1,4, trans-1,4 and 1,2 units are analyzed. The critical consideration of signal assignment and the comparison of 1H and 13C NMR data reveal that there are significant limitations to the quantitative characterization of polybutadienes with the use of NMR spectroscopy. © Pleiades Publishing, Ltd., 2012.

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