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  1. No Access

    Article

    The development of catalysts for dehydrogenation of lower C3-C4 paraffins using the products of gibbsite thermal activation

    A standardized approach to the preparation of alumina-chromia catalysts for dehydrogenation of lower C3-C4 paraffins is discussed. The approach is based on the use of initial products prepared by thermochemical a...

    N. A. Pakhomov, V. V. Molchanov, B. P. Zolotovskii… in Catalysis in Industry (2010)

  2. No Access

    Article

    Improvement of the method of obtaining gas sulfur

    An improved method of obtaining gas sulfur using the Claus and Sulfren processes, which provides an increase in its yield to 99.6–99.8%, is suggested. To realize this method, new catalysts are developed, namel...

    I. I. Artemova, T. O. Zinchenko, S. A. Molchanov… in Catalysis in Industry (2009)

  3. No Access

    Article

    Mössbauer Spectroscopy Study of Alumina-Supported Iron-Containing Catalysts for Hydrogen Sulfide Oxidation

    The correlation of the state of iron in supported Fe/Al2O3 catalysts with catalytic properties in H2S oxidation, studied by Mössbauer spectroscopy, indicates that the Fe oxide particles promote the formation of s...

    N.S. Sakaeva, V.A. Varnek, G.A. Bukhtiyarova… in Reaction Kinetics and Catalysis Letters (2000)

  4. No Access

    Article

    On the nature of factors determining reactivity of strongly bound surface species as intermediates in heterogeneous catalytic redox reactions

    The rate-limiting stage of heterogeneous catalytic redox reactions with participation of strongly bound surface species, such as nitrates, carbonates and sulfites, is the interaction of these heteroatomic oxid...

    V. A. Sadykov, A. Ya. Rozovskii, V. V. Lunin… in Reaction Kinetics and Catalysis Letters (1999)

  5. No Access

    Article

    Low-waste production of alumina catalysts for gas sulfur recovery

    A new low-waste technology for production of the alumina catalyst at the Claus process has been developed. The catalytic activity of the Claus alumina catalysts (IC-27-22) produced by this technology is close ...

    B. P. Zolotovskii, R. A. Buyanov… in Reaction Kinetics and Catalysis Letters (1995)

  6. No Access

    Article

    Influence of mechano-chemical activation and thermal treatment of kaolinite on cation distribution of Al(III) and formation of Na−A zeolite

    It has been established that cation distribution in kaolinite, which becomes close to that in Na−A zeolite due to mechano-chemical activation and thermal treatment, promotes zeolite crystallization. Optimal co...

    D. P. Klevtsov, O. P. Krivoruchko… in Reaction Kinetics and Catalysis Letters (1988)

  7. No Access

    Article

    Investigation of the structural changes in bayerite during mechanochemical activation

    1. The mechanochemical activation of bayerite is accompanied by displacement of the hydroxyl units followed by s...

    S. M. Paramzin, L. M. Plyasova… in Bulletin of the Academy of Sciences of the… (1988)

  8. No Access

    Article

    Kinetics of kaolinite dehydration and its dependence on mechanochemical activation

    For the mechanochemical activation of two processes can be considered: the structural disordering of laminar crystals, and the formation of molecular dense aggregates from small particles. The activation energ...

    D. P. Klevtsov, V. A. Logvinenko, B. P. Zolotovskii… in Journal of thermal analysis (1988)

  9. No Access

    Article

    Influence of the initial morphology of boehmite on the structural peculiarities of spinel Al(III) oxides

    The morphology of boehmite crystals and their aggregation type have been found to exert a significant influence on the structural peculiarities of their spinel Al(III) oxide products.

    O. P. Krivoruchko, L. M. Plyasova… in Reaction Kinetics and Catalysis Letters (1983)

  10. No Access

    Article

    Study of the effect of the size of hydrargillite crystals on the peculiarities of its thermal decomposition and formation of the phase composition of Al(III) oxides

    Conditions have been determined which allow production of pure χ-phase of Al(III) oxide from hydrargillite.

    B. P. Zolotovskii, O. P. Krivoruchko… in Reaction Kinetics and Catalysis Letters (1983)

  11. No Access

    Article

    Boehmite formation mechanism in precipitate ageing

    Phase composition of the products of Al(III) hydroxide ageing at 473 K is shown to be independent of pH. Under these conditions boehmite is always formed whose morphological structure is determined by both the...

    O. P. Krivoruchko, B. P. Zolotovskii… in Reaction Kinetics and Catalysis Letters (1982)

  12. No Access

    Article

    Study of local environment and cation distribution in Al(III) oxides by27Al-NMR with sample rotation at a “magic” angle

    The possible use of the27Al-NMR method with sample rotation at a “magic” angle to study the local environment and cation distribution of Al(III) ions in the oxide lattice are exemplified by γ-, х-, χ-, α-Al2O3 an...

    V. M. Mastikhin, O. P. Krivoruchko… in Reaction Kinetics and Catalysis Letters (1982)

  13. No Access

    Article

    Structure and properties of primary polymer particles of freshly precipitated Cr3+ hydrogels

    1. Freshly precipitated hydrogels of Cr3+ have a number of structural hydroxyl groups per single cation correspo...

    B. P. Zolotovskii, O. P. Krivoruchko… in Bulletin of the Academy of Sciences of the… (1977)

  14. No Access

    Article

    Some peculiarities of the mechanism of the hydrolytic polymerization of Fe3+ ions in aqueous solution

    1. Certain peculiarities of the mechanism of the polymerization of Fe3+ ions in aqueous solutions were investiga...

    M. E. Fedotov, O. P. Krivoruchko… in Bulletin of the Academy of Sciences of the… (1975)

  15. No Access

    Article

    Investigation of the properties of primary polymer particles of freshly precipitated Fe3+ hydrogels

    1. A new approach to the investigation of freshly precipitated Fe3+ hydrogels, based on the concepts of the poly...

    O. P. Krivoruchko, R. A. Buyanov… in Bulletin of the Academy of Sciences of the… (1974)