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  • 1
    Electronic Resource
    Electronic Resource
    Chemisorption of mixtures of propylene and oxygen on an oxide antimony-tin catalyst and tin dioxide (1968)
    Springer
    Russian chemical bulletin 17 (1968), S. 108-114 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The individual, successive, and simultaneous chemisorption of propylene and oxygen on a catalyst of mild oxidation of hydrocarbons (Sn/Sb) and a catalyst of profound oxidation (SnO2) was studied. 2. At temperatures substantially below the temperature of catalysis, C3H6 and O2 are adsorbed reversibly on both catalysts. 3. Under the conditions of precatalysis, the chemisorption of propylene and oxygen on Sn/Sb and SnO2 is partially irreversible. 4. The mutual influence of C3H6 and O2 differs on catalysts of mild and profound oxidation: on Sn/Sb, irreversibly adsorbed oxygen intensifies the subsequent chemisorption of propylene; on SnO2, irreversibly adsorbed propylene intensifies the subsequent chemisorption of oxygen. 5. The formation of intermediate hydrocarbon-oxygen complexes on the surface of the catalysts under conditions of precatalysis was proposed; moreover, the intermediate forms of mild and profound oxidation possess different structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00914646
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  • 2
    Electronic Resource
    Electronic Resource
    Catalytic oxidation of the simplest unsaturated hydrocarbons with heavy oxygen (1953)
    Springer
    Russian chemical bulletin 2 (1953), S. 625-630 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. A study has been made of the oxidation of ethylene and propene in presence of various catalysts (V2O5 V2O4 MgCr2O4. 2. By observations on the oxidation of ethylene and propene with heavy oxygen in presence of oxidative catalysts, the varying extents to which the oxygen,of the catalyst participates in the process have been demonstrated. 3. A relation has been established between the formation of products of the partial oxidation of the hydrocarbons (aldehydes) and the extent to which the oxygen of the catalyst participates in the oxidation reaction. 4. The application of the mass spectrometer method of analysis to the reaction products from the catalytic oxidation of hydrocarbons has enabled us to explain the diffferent mechanisms of the oxidation reactions at dffferent catalysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01171784
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum-chemical modeling of catalytic isomerization of olefins (1976)
    Springer
    Russian chemical bulletin 25 (1976), S. 1612-1614 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Following the extended Hückel method we have treated 1-butene isomerization on a fragment of the aluminum oxide surface, showing decomposition to be the limiting step in the associative carbonium ion and the intramolecular carbcation mechanisms, and formation of an intermediate surface compound to be the limiting step in the dissociative carbanion mechanism. 2. Comparison of the calculated barrier heights has shown the four isomerization mechanisms to be equally likely of realization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00921409
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  • 4
    Electronic Resource
    Electronic Resource
    IR Spectroscopy study of the interaction of methylpyrazine and 4-methylpyrimidine with vanadium and molybdenum oxides supported on magnesium oxide (1977)
    Springer
    Russian chemical bulletin 26 (1977), S. 2287-2292 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The introduction of vanadium and molybdenum oxides into MgO gives rise to the formation of acid centers which bond with adsorbed methylpyrazine and 4-methylpyrimidine through the ring nitrogen atom. 2. Increasing the temperature changes the state of these active centers and thereby increases the strength of coordinational bonding of the methylpyrazine and 4-methylpyrimidine with the surface of the vanadium and molybdenum oxides on MgO. Similar effects are not observed in the interaction of these diazines with the γ-Al2O3 surface. 3. The interaction of oxygen with methylpyrazine and 4-methylpyrimidine adsorbed on vanadium and molybdenum oxides supported by MgO gives rise to the formation of surface heterocyclic carbonyl compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00958712
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  • 5
    Electronic Resource
    Electronic Resource
    IR-spectroscopic study of compounds formed by unsaturated aldehydes and acids on the cobalt molybdate surface (1978)
    Springer
    Russian chemical bulletin 27 (1978), S. 466-472 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Acrolein and methacrolein coordinately bond through the aldehyde group oxygen during adsorption on the surface of cobalt molybdate catalysts modified by Co, V, and Mo ions. 2. The C=C bond of the aldehyde does not participate in the formation of surface compounds with cobalt molybdate. 3. Acrylates and methacrylates are formed in the interaction of acrylic and methacrylic acids with the catalyst surface. 4. Modification of cobalt molybdate with Co, V, and Mo ions changes the strength of surface bonding and affects the catalytic reaction involved in the formation of CO and CO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00923917
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  • 6
    Electronic Resource
    Electronic Resource
    Mechansim of propylene oxidation on modified cobalt molybdate catalysts (1977)
    Springer
    Russian chemical bulletin 26 (1977), S. 473-477 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Study has been made of the effect of adding iron, copper, nickel, and vanadium oxides to cobalt molybdate catalysts used for oxidizing propylene to acrolein and acrylic acid, and acrolein to acrylic acid. 2. The structure, Mo-O bond type, and solid body electron transfer resulting from reaction component adsorption are the principal factors determining the activity and selectivity of propylene oxidation to acrolein on modified cobalt molybdate catalysts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179445
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  • 7
    Electronic Resource
    Electronic Resource
    Investigation of the interaction of isobutylene with an antimony-tin catalyst (1976)
    Springer
    Russian chemical bulletin 25 (1976), S. 722-725 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The surface of a SnO2-Sb2O4 catalyst is uniformly homogeneous with respect to the heats of adsorption of isobutylene. The heats vary from 50 to 20 kcal/mole as the degree of coverage is increased to 18% of a monolayer. 2. Isobutylene is adsorbed on SnO2-Sb2O4 in two forms: reversible (desorbed in the range 79–100° with Edes=21 kcal/mole) and irreversible. 3. Irreversibly chemisorbed isobutylene exists on the surface primarily in the form of theπ-methallyl complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00922367
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  • 8
    Electronic Resource
    Electronic Resource
    Quantum chemical model study of the catalytic isomerization of olefins (1975)
    Springer
    Russian chemical bulletin 24 (1975), S. 454-459 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. Quantum chemical calculations of possible intermediate states in the isomerization of 1-butene and their interaction with aluminum oxide, the surface of which was simulated by the O=AlOH fragment, were performed in the approximation of the expanded Hückel method. 2. The possibility of the occurrence of catalytic isomerization of 1-butene according to associative carbonium ion, dissociative allylcarbanion, and allylcarbocation mechanisms was discussed. For the second of them, the limiting step should be the formation of the intermediate complex, while for the other mechanisms it should be the decomposition of the complex with the formation of 2-butene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00927454
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  • 9
    Electronic Resource
    Electronic Resource
    Iron-containing zeolites as catalysts of the profound oxidation of propylene (1970)
    Springer
    Russian chemical bulletin 19 (1970), S. 929-933 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The catalytic behavior of iron-containing zeolites in the reaction of profound oxidation of propylene was studied. It was found that the catalytic activity of zeolites of the NaX, NaY, CaX, and CaA types increases sharply with the replacement of Na+ or Ca2+ ions by the iron ion. 2. A change in the degree of exchange of Na+ or Ca2+ ions for the Fe3+ ion in zeolites of the X, Y, and CaA types influences the rate constant and the conversion of propylene. 3. The change in the catalytic activity of zeolites with the introduction of the iron is evidently associated with the nonequivalence of the cationic regions in the structures of the individual zeolites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01084290
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  • 10
    Electronic Resource
    Electronic Resource
    The role of oxygen in the catalytic oxidative dehydrogenation of butylene (1970)
    Springer
    Russian chemical bulletin 19 (1970), S. 1687-1691 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The individual chemisorption of propylene, butylene, and oxygen and the chemisorption of mixture of olefins with oxygen were investigated on bismuth-molybdenum, antimony-tin, iron-zinc-chromium, and antimony-chromium oxide catalysts at temperatures close to the temperature of catalysis. 2. The adsorption of olefins on active catalysts was partially irreversible. On catalysts inactive in the oxidation of propylene, only reversible adsorption of this gas was observed. 3. On all the catalysts expect for the iron-zinc-chromium catalyst, oxygen was adsorbed partially irreversibly. On active catalysts, in the presence of irreversibly adsorbed oxygen, a superadditive adsorption of butylene and propylene is observed. No intensification of the adsorption of oxygen was detected under the influence of preliminary adsorption of hydrocarbons. The superadditivity of the adsorption is explained by the formation of intermediate forms of oxidative transformations of the hydrocarbons. 4. The data obtained show that on all three catalysts studied, oxygen evidently participates in the formation of active centers and intermediate forms of the oxidative dehydrogenation of butylene. The formation of divinyl from butylene in the presence of oxygen on an iron-zinc-chromium catalyst probably proceeds according to a different mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00996505
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